Merge branch 'master' into layoutgraph

Conflicts:
	tests/testbench/com/vaadin/tests/components/orderedlayout/OrderedLayoutCases.java

359 files changed, 1802 insertions, 852 deletions

diff --git a/tests/testbench/com/vaadin/launcher/ApplicationRunnerServlet.java b/tests/testbench/com/vaadin/launcher/ApplicationRunnerServlet.java
index bb37082d30..8183ed2d0b 100644
--- a/tests/testbench/com/vaadin/launcher/ApplicationRunnerServlet.java
+++ b/tests/testbench/com/vaadin/launcher/ApplicationRunnerServlet.java
@@ -30,13 +30,13 @@ import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
 import com.vaadin.Application;
-import com.vaadin.RootRequiresMoreInformationException;
-import com.vaadin.terminal.AbstractRootProvider;
+import com.vaadin.UIRequiresMoreInformationException;
+import com.vaadin.terminal.AbstractUIProvider;
 import com.vaadin.terminal.WrappedRequest;
 import com.vaadin.terminal.gwt.server.AbstractApplicationServlet;
 import com.vaadin.terminal.gwt.server.WrappedHttpServletRequest;
 import com.vaadin.tests.components.TestBase;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
 @SuppressWarnings("serial")
 public class ApplicationRunnerServlet extends AbstractApplicationServlet {
@@ -110,15 +110,15 @@ public class ApplicationRunnerServlet extends AbstractApplicationServlet {
         // Creates a new application instance
         try {
             final Class<?> classToRun = getClassToRun();
-            if (Root.class.isAssignableFrom(classToRun)) {
+            if (UI.class.isAssignableFrom(classToRun)) {
                 Application application = new Application();
-                application.addRootProvider(new AbstractRootProvider() {
+                application.addUIProvider(new AbstractUIProvider() {
 
                     @Override
-                    public Class<? extends Root> getRootClass(
+                    public Class<? extends UI> getUIClass(
                             Application application, WrappedRequest request)
-                            throws RootRequiresMoreInformationException {
-                        return (Class<? extends Root>) classToRun;
+                            throws UIRequiresMoreInformationException {
+                        return (Class<? extends UI>) classToRun;
                     }
                 });
                 return application;
@@ -126,7 +126,7 @@ public class ApplicationRunnerServlet extends AbstractApplicationServlet {
                 return (Application) classToRun.newInstance();
             } else {
                 throw new ServletException(classToRun.getCanonicalName()
-                        + " is neither an Application nor a Root");
+                        + " is neither an Application nor a UI");
             }
         } catch (final IllegalAccessException e) {
             throw new ServletException(e);
@@ -215,13 +215,13 @@ public class ApplicationRunnerServlet extends AbstractApplicationServlet {
     protected Class<? extends Application> getApplicationClass()
             throws ClassNotFoundException {
         Class<?> classToRun = getClassToRun();
-        if (Root.class.isAssignableFrom(classToRun)) {
+        if (UI.class.isAssignableFrom(classToRun)) {
             return Application.class;
         } else if (Application.class.isAssignableFrom(classToRun)) {
             return classToRun.asSubclass(Application.class);
         } else {
             throw new ClassCastException(classToRun.getCanonicalName()
-                    + " is not an Application nor a Root");
+                    + " is not an Application nor a UI");
         }
     }
 
diff --git a/tests/testbench/com/vaadin/tests/Components.java b/tests/testbench/com/vaadin/tests/Components.java
index f4fa1b6608..66e693a1de 100644
--- a/tests/testbench/com/vaadin/tests/Components.java
+++ b/tests/testbench/com/vaadin/tests/Components.java
@@ -25,7 +25,7 @@ import com.vaadin.ui.ComponentContainer;
 import com.vaadin.ui.Embedded;
 import com.vaadin.ui.HorizontalSplitPanel;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Tree;
 import com.vaadin.ui.Tree.ItemStyleGenerator;
 import com.vaadin.ui.VerticalLayout;
diff --git a/tests/testbench/com/vaadin/tests/CustomLayoutDemo.java b/tests/testbench/com/vaadin/tests/CustomLayoutDemo.java
index ce99f6e70f..833340f678 100644
--- a/tests/testbench/com/vaadin/tests/CustomLayoutDemo.java
+++ b/tests/testbench/com/vaadin/tests/CustomLayoutDemo.java
@@ -26,7 +26,7 @@ import com.vaadin.ui.Field;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
 import com.vaadin.ui.PasswordField;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.Tree;
 
diff --git a/tests/testbench/com/vaadin/tests/LayoutDemo.java b/tests/testbench/com/vaadin/tests/LayoutDemo.java
index 1a3801aecc..23997ac084 100644
--- a/tests/testbench/com/vaadin/tests/LayoutDemo.java
+++ b/tests/testbench/com/vaadin/tests/LayoutDemo.java
@@ -25,7 +25,7 @@ import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Layout;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TabSheet;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/ListenerOrder.java b/tests/testbench/com/vaadin/tests/ListenerOrder.java
index 7f136b10ed..ab364a8781 100644
--- a/tests/testbench/com/vaadin/tests/ListenerOrder.java
+++ b/tests/testbench/com/vaadin/tests/ListenerOrder.java
@@ -13,7 +13,7 @@ import com.vaadin.data.Property.ValueChangeListener;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Select;
 
 public class ListenerOrder extends com.vaadin.Application.LegacyApplication
diff --git a/tests/testbench/com/vaadin/tests/ModalWindow.java b/tests/testbench/com/vaadin/tests/ModalWindow.java
index 84fa761eb4..6153f14285 100644
--- a/tests/testbench/com/vaadin/tests/ModalWindow.java
+++ b/tests/testbench/com/vaadin/tests/ModalWindow.java
@@ -20,7 +20,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.Window;
 
diff --git a/tests/testbench/com/vaadin/tests/NativeWindowing.java b/tests/testbench/com/vaadin/tests/NativeWindowing.java
index 70f978a8b1..4bce92b668 100644
--- a/tests/testbench/com/vaadin/tests/NativeWindowing.java
+++ b/tests/testbench/com/vaadin/tests/NativeWindowing.java
@@ -24,7 +24,7 @@ import com.vaadin.shared.ui.label.ContentMode;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Window;
 
 public class NativeWindowing extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/Parameters.java b/tests/testbench/com/vaadin/tests/Parameters.java
index e9824d9c40..d6bc9007ed 100644
--- a/tests/testbench/com/vaadin/tests/Parameters.java
+++ b/tests/testbench/com/vaadin/tests/Parameters.java
@@ -30,7 +30,7 @@ import com.vaadin.ui.Label;
 import com.vaadin.ui.Layout.MarginHandler;
 import com.vaadin.ui.Link;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/RandomLayoutStress.java b/tests/testbench/com/vaadin/tests/RandomLayoutStress.java
index 711e79a28d..0161a2a20e 100644
--- a/tests/testbench/com/vaadin/tests/RandomLayoutStress.java
+++ b/tests/testbench/com/vaadin/tests/RandomLayoutStress.java
@@ -29,7 +29,7 @@ import com.vaadin.ui.Label;
 import com.vaadin.ui.Layout;
 import com.vaadin.ui.Link;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Select;
 import com.vaadin.ui.TabSheet;
 import com.vaadin.ui.TextField;
diff --git a/tests/testbench/com/vaadin/tests/ScrollbarStressTest.java b/tests/testbench/com/vaadin/tests/ScrollbarStressTest.java
index 9cd27e9d5c..7436bfc539 100644
--- a/tests/testbench/com/vaadin/tests/ScrollbarStressTest.java
+++ b/tests/testbench/com/vaadin/tests/ScrollbarStressTest.java
@@ -10,7 +10,7 @@ import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.OptionGroup;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TabSheet;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
diff --git a/tests/testbench/com/vaadin/tests/TestBench.java b/tests/testbench/com/vaadin/tests/TestBench.java
index b58df225bc..32fff09455 100644
--- a/tests/testbench/com/vaadin/tests/TestBench.java
+++ b/tests/testbench/com/vaadin/tests/TestBench.java
@@ -37,7 +37,7 @@ import com.vaadin.ui.Label;
 import com.vaadin.ui.Layout;
 import com.vaadin.ui.Link;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Tree;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/TestForApplicationLayoutThatUsesWholeBrosersSpace.java b/tests/testbench/com/vaadin/tests/TestForApplicationLayoutThatUsesWholeBrosersSpace.java
index 78ab9f61ca..c3fa269fba 100644
--- a/tests/testbench/com/vaadin/tests/TestForApplicationLayoutThatUsesWholeBrosersSpace.java
+++ b/tests/testbench/com/vaadin/tests/TestForApplicationLayoutThatUsesWholeBrosersSpace.java
@@ -19,7 +19,7 @@ package com.vaadin.tests;
 import com.vaadin.Application;
 import com.vaadin.ui.HorizontalSplitPanel;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
 import com.vaadin.ui.VerticalSplitPanel;
diff --git a/tests/testbench/com/vaadin/tests/TestForNativeWindowing.java b/tests/testbench/com/vaadin/tests/TestForNativeWindowing.java
index 628c3cc4e8..41b3309c57 100644
--- a/tests/testbench/com/vaadin/tests/TestForNativeWindowing.java
+++ b/tests/testbench/com/vaadin/tests/TestForNativeWindowing.java
@@ -24,7 +24,7 @@ import com.vaadin.shared.ui.label.ContentMode;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Window;
 
 public class TestForNativeWindowing extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/TestForStyledUpload.java b/tests/testbench/com/vaadin/tests/TestForStyledUpload.java
index 120cf9a59a..af41ccc37b 100644
--- a/tests/testbench/com/vaadin/tests/TestForStyledUpload.java
+++ b/tests/testbench/com/vaadin/tests/TestForStyledUpload.java
@@ -36,7 +36,7 @@ import com.vaadin.ui.Layout;
 import com.vaadin.ui.Link;
 import com.vaadin.ui.Panel;
 import com.vaadin.ui.ProgressIndicator;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Upload;
 import com.vaadin.ui.Upload.FailedEvent;
 import com.vaadin.ui.Upload.FailedListener;
diff --git a/tests/testbench/com/vaadin/tests/TestForWindowOpen.java b/tests/testbench/com/vaadin/tests/TestForWindowOpen.java
index 621bdbfee2..3b5c7404e7 100644
--- a/tests/testbench/com/vaadin/tests/TestForWindowOpen.java
+++ b/tests/testbench/com/vaadin/tests/TestForWindowOpen.java
@@ -20,7 +20,7 @@ import com.vaadin.terminal.ExternalResource;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.CustomComponent;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 import com.vaadin.ui.VerticalLayout;
 
 public class TestForWindowOpen extends CustomComponent {
@@ -37,7 +37,7 @@ public class TestForWindowOpen extends CustomComponent {
                     public void buttonClick(ClickEvent event) {
                         final ExternalResource r = new ExternalResource(
                                 "http://www.google.com");
-                        Root.getCurrent().getPage().open(r);
+                        UI.getCurrent().getPage().open(r);
 
                     }
 
@@ -50,7 +50,7 @@ public class TestForWindowOpen extends CustomComponent {
                     public void buttonClick(ClickEvent event) {
                         final ExternalResource r = new ExternalResource(
                                 "http://www.google.com");
-                        Root.getCurrent().getPage().open(r, "mytarget");
+                        UI.getCurrent().getPage().open(r, "mytarget");
 
                     }
 
@@ -63,7 +63,7 @@ public class TestForWindowOpen extends CustomComponent {
                     public void buttonClick(ClickEvent event) {
                         final ExternalResource r = new ExternalResource(
                                 "http://www.google.com");
-                        Root.getCurrent().getPage().open(r, "secondtarget");
+                        UI.getCurrent().getPage().open(r, "secondtarget");
 
                     }
 
diff --git a/tests/testbench/com/vaadin/tests/TestForWindowing.java b/tests/testbench/com/vaadin/tests/TestForWindowing.java
index 9a3362af8b..a59323b97c 100644
--- a/tests/testbench/com/vaadin/tests/TestForWindowing.java
+++ b/tests/testbench/com/vaadin/tests/TestForWindowing.java
@@ -26,7 +26,7 @@ import com.vaadin.ui.CheckBox;
 import com.vaadin.ui.CustomComponent;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.OptionGroup;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 import com.vaadin.ui.Select;
 import com.vaadin.ui.Slider;
 import com.vaadin.ui.VerticalLayout;
@@ -99,7 +99,7 @@ public class TestForWindowing extends CustomComponent {
 
                         w.addComponent(s);
 
-                        Root.getCurrent().addWindow(w);
+                        UI.getCurrent().addWindow(w);
 
                     }
 
diff --git a/tests/testbench/com/vaadin/tests/TestSetVisibleAndCaching.java b/tests/testbench/com/vaadin/tests/TestSetVisibleAndCaching.java
index 5b3a93e065..6bb8bac200 100644
--- a/tests/testbench/com/vaadin/tests/TestSetVisibleAndCaching.java
+++ b/tests/testbench/com/vaadin/tests/TestSetVisibleAndCaching.java
@@ -21,7 +21,7 @@ import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class TestSetVisibleAndCaching extends
         com.vaadin.Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/TestSizeableIncomponents.java b/tests/testbench/com/vaadin/tests/TestSizeableIncomponents.java
index f33132a709..a0ff6f0fc7 100644
--- a/tests/testbench/com/vaadin/tests/TestSizeableIncomponents.java
+++ b/tests/testbench/com/vaadin/tests/TestSizeableIncomponents.java
@@ -37,7 +37,7 @@ import com.vaadin.ui.Embedded;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/TestSplitPanel.java b/tests/testbench/com/vaadin/tests/TestSplitPanel.java
index d1a6ede53c..4b0b47ed74 100644
--- a/tests/testbench/com/vaadin/tests/TestSplitPanel.java
+++ b/tests/testbench/com/vaadin/tests/TestSplitPanel.java
@@ -17,7 +17,7 @@
 package com.vaadin.tests;
 
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalSplitPanel;
 
 public class TestSplitPanel extends com.vaadin.Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/TreeFilesystem.java b/tests/testbench/com/vaadin/tests/TreeFilesystem.java
index b311ae32b1..f2a0d97b08 100644
--- a/tests/testbench/com/vaadin/tests/TreeFilesystem.java
+++ b/tests/testbench/com/vaadin/tests/TreeFilesystem.java
@@ -23,7 +23,7 @@ import com.vaadin.shared.ui.label.ContentMode;
 import com.vaadin.tests.util.SampleDirectory;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Tree;
 import com.vaadin.ui.Tree.ExpandEvent;
 
diff --git a/tests/testbench/com/vaadin/tests/TreeFilesystemContainer.java b/tests/testbench/com/vaadin/tests/TreeFilesystemContainer.java
index 52dd61dbee..672c518ea8 100644
--- a/tests/testbench/com/vaadin/tests/TreeFilesystemContainer.java
+++ b/tests/testbench/com/vaadin/tests/TreeFilesystemContainer.java
@@ -26,7 +26,7 @@ import com.vaadin.ui.Component.Listener;
 import com.vaadin.ui.Field;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Tree;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/UpgradingSample.java b/tests/testbench/com/vaadin/tests/UpgradingSample.java
index cf2516fbff..48e2222d7e 100644
--- a/tests/testbench/com/vaadin/tests/UpgradingSample.java
+++ b/tests/testbench/com/vaadin/tests/UpgradingSample.java
@@ -31,7 +31,7 @@ import com.vaadin.ui.CustomComponent;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.Tree;
 import com.vaadin.ui.VerticalLayout;
diff --git a/tests/testbench/com/vaadin/tests/UsingObjectsInSelect.java b/tests/testbench/com/vaadin/tests/UsingObjectsInSelect.java
index 42a9d358c5..c5a836b4f1 100644
--- a/tests/testbench/com/vaadin/tests/UsingObjectsInSelect.java
+++ b/tests/testbench/com/vaadin/tests/UsingObjectsInSelect.java
@@ -24,7 +24,7 @@ import com.vaadin.data.Property.ValueChangeListener;
 import com.vaadin.shared.ui.label.ContentMode;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Select;
 
 public class UsingObjectsInSelect extends
diff --git a/tests/testbench/com/vaadin/tests/appengine/GAESyncTest.java b/tests/testbench/com/vaadin/tests/appengine/GAESyncTest.java
index fbf9e7b46e..9fa716a23e 100644
--- a/tests/testbench/com/vaadin/tests/appengine/GAESyncTest.java
+++ b/tests/testbench/com/vaadin/tests/appengine/GAESyncTest.java
@@ -12,7 +12,7 @@ import com.vaadin.ui.Embedded;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Notification;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 public class GAESyncTest extends Application.LegacyApplication {
@@ -93,8 +93,8 @@ public class GAESyncTest extends Application.LegacyApplication {
 
                     @Override
                     public void buttonClick(ClickEvent event) {
-                        if (getRoot() == getMainWindow()) {
-                            getRoot().getPage().showNotification(
+                        if (getUI() == getMainWindow()) {
+                            getUI().getPage().showNotification(
                                     new Notification("main"));
                             try {
                                 Thread.sleep((5000));
diff --git a/tests/testbench/com/vaadin/tests/application/ErrorInUnloadEvent.java b/tests/testbench/com/vaadin/tests/application/ErrorInUnloadEvent.java
index 690df3f360..2e6c188331 100644
--- a/tests/testbench/com/vaadin/tests/application/ErrorInUnloadEvent.java
+++ b/tests/testbench/com/vaadin/tests/application/ErrorInUnloadEvent.java
@@ -10,7 +10,7 @@ import com.vaadin.ui.FormLayout;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.PasswordField;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/application/RefreshStatePreserve.java b/tests/testbench/com/vaadin/tests/application/RefreshStatePreserve.java
index bd2aea3756..1e6509ab85 100644
--- a/tests/testbench/com/vaadin/tests/application/RefreshStatePreserve.java
+++ b/tests/testbench/com/vaadin/tests/application/RefreshStatePreserve.java
@@ -1,34 +1,34 @@
 package com.vaadin.tests.application;
 
 import com.vaadin.Application;
-import com.vaadin.RootRequiresMoreInformationException;
-import com.vaadin.terminal.AbstractRootProvider;
+import com.vaadin.UIRequiresMoreInformationException;
+import com.vaadin.terminal.AbstractUIProvider;
 import com.vaadin.terminal.WrappedRequest;
 import com.vaadin.tests.components.AbstractTestApplication;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
 public class RefreshStatePreserve extends AbstractTestApplication {
-    public static class RefreshStateRoot extends Root {
+    public static class RefreshStateUI extends UI {
         @Override
         public void init(WrappedRequest request) {
             getContent().addComponent(
                     new Label("window.name: "
                             + request.getBrowserDetails().getWindowName()));
-            getContent().addComponent(new Label("Root id: " + getRootId()));
+            getContent().addComponent(new Label("UI id: " + getUIId()));
         }
     }
 
     @Override
     public void init() {
         super.init();
-        setRootPreserved(true);
-        addRootProvider(new AbstractRootProvider() {
+        setUiPreserved(true);
+        addUIProvider(new AbstractUIProvider() {
             @Override
-            public Class<? extends Root> getRootClass(Application application,
+            public Class<? extends UI> getUIClass(Application application,
                     WrappedRequest request)
-                    throws RootRequiresMoreInformationException {
-                return RefreshStateRoot.class;
+                    throws UIRequiresMoreInformationException {
+                return RefreshStateUI.class;
             }
         });
     }
diff --git a/tests/testbench/com/vaadin/tests/application/TerminalErrorNotification.java b/tests/testbench/com/vaadin/tests/application/TerminalErrorNotification.java
index 77596da0f9..992a3afbca 100644
--- a/tests/testbench/com/vaadin/tests/application/TerminalErrorNotification.java
+++ b/tests/testbench/com/vaadin/tests/application/TerminalErrorNotification.java
@@ -19,7 +19,7 @@ import com.vaadin.tests.components.TestBase;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Notification;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
 public class TerminalErrorNotification extends TestBase {
 
@@ -41,7 +41,7 @@ public class TerminalErrorNotification extends TestBase {
     public void terminalError(com.vaadin.terminal.Terminal.ErrorEvent event) {
         event.getThrowable().printStackTrace();
 
-        Root mainWindow = getMainWindow();
+        UI mainWindow = getMainWindow();
         if (mainWindow != null) {
             Throwable throwable = event.getThrowable();
 
diff --git a/tests/testbench/com/vaadin/tests/application/ThreadLocalInstances.java b/tests/testbench/com/vaadin/tests/application/ThreadLocalInstances.java
index def68a7357..fa5ab7d100 100644
--- a/tests/testbench/com/vaadin/tests/application/ThreadLocalInstances.java
+++ b/tests/testbench/com/vaadin/tests/application/ThreadLocalInstances.java
@@ -1,7 +1,7 @@
 package com.vaadin.tests.application;
 
 import com.vaadin.Application;
-import com.vaadin.RootRequiresMoreInformationException;
+import com.vaadin.UIRequiresMoreInformationException;
 import com.vaadin.terminal.ApplicationResource;
 import com.vaadin.terminal.DownloadStream;
 import com.vaadin.terminal.PaintException;
@@ -12,14 +12,14 @@ import com.vaadin.tests.util.Log;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Embedded;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
 public class ThreadLocalInstances extends AbstractTestApplication {
     private static final Application staticInitApplication = Application
             .getCurrent();
-    private static final Root staticInitRoot = Root.getCurrent();
+    private static final UI staticInitRoot = UI.getCurrent();
 
-    private final Root mainWindow = new Root() {
+    private final UI mainWindow = new UI() {
         boolean paintReported = false;
 
         @Override
@@ -77,14 +77,14 @@ public class ThreadLocalInstances extends AbstractTestApplication {
     }
 
     @Override
-    protected Root getRoot(WrappedRequest request)
-            throws RootRequiresMoreInformationException {
+    protected UI getUI(WrappedRequest request)
+            throws UIRequiresMoreInformationException {
         return mainWindow;
     }
 
     @Override
     protected String getTestDescription() {
-        return "Tests the precence of Application.getCurrentApplication() and Root.getCurrentRoot() from different contexts";
+        return "Tests the precence of Application.getCurrentApplication() and UI.getCurrentRoot() from different contexts";
     }
 
     @Override
@@ -93,12 +93,12 @@ public class ThreadLocalInstances extends AbstractTestApplication {
     }
 
     private void reportCurrentStatus(String phase) {
-        reportStatus(phase, Application.getCurrent(), Root.getCurrent());
+        reportStatus(phase, Application.getCurrent(), UI.getCurrent());
     }
 
-    private void reportStatus(String phase, Application application, Root root) {
+    private void reportStatus(String phase, Application application, UI uI) {
         log.log(getState(application, this) + " app in " + phase);
-        log.log(getState(root, mainWindow) + " root in " + phase);
+        log.log(getState(uI, mainWindow) + " root in " + phase);
     }
 
     private static String getState(Object value, Object reference) {
diff --git a/tests/testbench/com/vaadin/tests/applicationcontext/ChangeSessionId.java b/tests/testbench/com/vaadin/tests/applicationcontext/ChangeSessionId.java
index abcdf232cd..3169806f27 100644
--- a/tests/testbench/com/vaadin/tests/applicationcontext/ChangeSessionId.java
+++ b/tests/testbench/com/vaadin/tests/applicationcontext/ChangeSessionId.java
@@ -6,7 +6,7 @@ import com.vaadin.tests.util.Log;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class ChangeSessionId extends AbstractTestCase {
 
diff --git a/tests/testbench/com/vaadin/tests/components/AbstractTestRoot.java b/tests/testbench/com/vaadin/tests/components/AbstractTestUI.java
index d20f7a4a21..7dd742952f 100644
--- a/tests/testbench/com/vaadin/tests/components/AbstractTestRoot.java
+++ b/tests/testbench/com/vaadin/tests/components/AbstractTestUI.java
@@ -8,10 +8,10 @@ import com.vaadin.terminal.gwt.server.AbstractWebApplicationContext;
 import com.vaadin.terminal.gwt.server.WebBrowser;
 import com.vaadin.ui.Component;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 import com.vaadin.ui.VerticalLayout;
 
-public abstract class AbstractTestRoot extends Root {
+public abstract class AbstractTestUI extends UI {
 
     @Override
     public void init(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/components/TestBase.java b/tests/testbench/com/vaadin/tests/components/TestBase.java
index a66f0efe64..19c6826977 100644
--- a/tests/testbench/com/vaadin/tests/components/TestBase.java
+++ b/tests/testbench/com/vaadin/tests/components/TestBase.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.components;
 import com.vaadin.shared.ui.label.ContentMode;
 import com.vaadin.ui.Component;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public abstract class TestBase extends AbstractTestCase {
diff --git a/tests/testbench/com/vaadin/tests/components/TouchScrollables.java b/tests/testbench/com/vaadin/tests/components/TouchScrollables.java
index 415f660c62..6c340804af 100644
--- a/tests/testbench/com/vaadin/tests/components/TouchScrollables.java
+++ b/tests/testbench/com/vaadin/tests/components/TouchScrollables.java
@@ -51,7 +51,7 @@ public class TouchScrollables extends TestBase {
 
         TestUtils
                 .injectCSS(
-                        getLayout().getRoot(),
+                        getLayout().getUI(),
                         "body * {-webkit-user-select: none;} .v-table-row-drag-middle .v-table-cell-content {"
                                 + "        background-color: inherit ; border-bottom: 1px solid cyan;"
                                 + "}"
@@ -81,7 +81,7 @@ public class TouchScrollables extends TestBase {
                 new Button.ClickListener() {
                     @Override
                     public void buttonClick(ClickEvent event) {
-                        getLayout().getRoot().scrollIntoView(l);
+                        getLayout().getUI().scrollIntoView(l);
                     }
                 });
         cssLayout.addComponent(button);
diff --git a/tests/testbench/com/vaadin/tests/components/abstractcomponent/AllComponentTooltipTest.java b/tests/testbench/com/vaadin/tests/components/abstractcomponent/AllComponentTooltipTest.java
index 100c30cdc9..34655be91d 100644
--- a/tests/testbench/com/vaadin/tests/components/abstractcomponent/AllComponentTooltipTest.java
+++ b/tests/testbench/com/vaadin/tests/components/abstractcomponent/AllComponentTooltipTest.java
@@ -17,12 +17,12 @@ package com.vaadin.tests.components.abstractcomponent;
 
 import com.vaadin.terminal.WrappedRequest;
 import com.vaadin.tests.VaadinClasses;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.ui.AbstractComponent;
 import com.vaadin.ui.Component;
 import com.vaadin.ui.GridLayout;
 
-public class AllComponentTooltipTest extends AbstractTestRoot {
+public class AllComponentTooltipTest extends AbstractTestUI {
 
     @Override
     protected void setup(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/components/abstractcomponent/EnableState.java b/tests/testbench/com/vaadin/tests/components/abstractcomponent/EnableState.java
index f8931ecdea..e93529fad4 100644
--- a/tests/testbench/com/vaadin/tests/components/abstractcomponent/EnableState.java
+++ b/tests/testbench/com/vaadin/tests/components/abstractcomponent/EnableState.java
@@ -6,7 +6,7 @@ import com.vaadin.tests.components.AbstractTestCase;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.CheckBox;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class EnableState extends AbstractTestCase {
     @Override
diff --git a/tests/testbench/com/vaadin/tests/components/button/ButtonsInHorizontalLayout.java b/tests/testbench/com/vaadin/tests/components/button/ButtonsInHorizontalLayout.java
index bdabed3032..3a0afdce50 100644
--- a/tests/testbench/com/vaadin/tests/components/button/ButtonsInHorizontalLayout.java
+++ b/tests/testbench/com/vaadin/tests/components/button/ButtonsInHorizontalLayout.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.components.button;
 import com.vaadin.tests.components.AbstractTestCase;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.HorizontalLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 import com.vaadin.ui.themes.BaseTheme;
 
diff --git a/tests/testbench/com/vaadin/tests/components/combobox/ComboBoxInPopup.java b/tests/testbench/com/vaadin/tests/components/combobox/ComboBoxInPopup.java
index c0490c127d..393a8ceb6b 100644
--- a/tests/testbench/com/vaadin/tests/components/combobox/ComboBoxInPopup.java
+++ b/tests/testbench/com/vaadin/tests/components/combobox/ComboBoxInPopup.java
@@ -25,7 +25,7 @@ public class ComboBoxInPopup extends TestBase {
         close.setClickShortcut(KeyCode.ESCAPE, null);
         w.addComponent(close);
 
-        getLayout().getRoot().addWindow(w);
+        getLayout().getUI().addWindow(w);
 
     }
 
diff --git a/tests/testbench/com/vaadin/tests/components/combobox/ComboBoxReapperingOldValue.java b/tests/testbench/com/vaadin/tests/components/combobox/ComboBoxReapperingOldValue.java
index 5dc5a2efbd..10afb05ae3 100644
--- a/tests/testbench/com/vaadin/tests/components/combobox/ComboBoxReapperingOldValue.java
+++ b/tests/testbench/com/vaadin/tests/components/combobox/ComboBoxReapperingOldValue.java
@@ -8,7 +8,7 @@ import com.vaadin.data.util.IndexedContainer;
 import com.vaadin.ui.AbstractSelect;
 import com.vaadin.ui.ComboBox;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 @SuppressWarnings("serial")
diff --git a/tests/testbench/com/vaadin/tests/components/combobox/GridLayoutComboBoxZoomOut.java b/tests/testbench/com/vaadin/tests/components/combobox/GridLayoutComboBoxZoomOut.java
index 37b0fe21a1..f64fd6f5fa 100644
--- a/tests/testbench/com/vaadin/tests/components/combobox/GridLayoutComboBoxZoomOut.java
+++ b/tests/testbench/com/vaadin/tests/components/combobox/GridLayoutComboBoxZoomOut.java
@@ -5,7 +5,7 @@ import com.vaadin.ui.ComboBox;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Layout;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 import com.vaadin.ui.Select;
 
 @SuppressWarnings("serial")
@@ -13,7 +13,7 @@ public class GridLayoutComboBoxZoomOut extends AbstractTestCase {
 
     @Override
     public void init() {
-        Root.LegacyWindow mainWindow = new Root.LegacyWindow(
+        UI.LegacyWindow mainWindow = new UI.LegacyWindow(
                 "Gridlayoutbug Application");
         setMainWindow(mainWindow);
 
diff --git a/tests/testbench/com/vaadin/tests/components/datefield/DateFieldInSubWindow.java b/tests/testbench/com/vaadin/tests/components/datefield/DateFieldInSubWindow.java
index 85f1c80a08..4cf7b98679 100644
--- a/tests/testbench/com/vaadin/tests/components/datefield/DateFieldInSubWindow.java
+++ b/tests/testbench/com/vaadin/tests/components/datefield/DateFieldInSubWindow.java
@@ -13,7 +13,7 @@ import com.vaadin.ui.DefaultFieldFactory;
 import com.vaadin.ui.Field;
 import com.vaadin.ui.Form;
 import com.vaadin.ui.HorizontalLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 import com.vaadin.ui.Window;
 
diff --git a/tests/testbench/com/vaadin/tests/components/datefield/DateFieldPopupOffScreen.java b/tests/testbench/com/vaadin/tests/components/datefield/DateFieldPopupOffScreen.java
index b87c458c01..ac3296724b 100644
--- a/tests/testbench/com/vaadin/tests/components/datefield/DateFieldPopupOffScreen.java
+++ b/tests/testbench/com/vaadin/tests/components/datefield/DateFieldPopupOffScreen.java
@@ -8,7 +8,7 @@ import com.vaadin.ui.Alignment;
 import com.vaadin.ui.DateField;
 import com.vaadin.ui.DateField.Resolution;
 import com.vaadin.ui.GridLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class DateFieldPopupOffScreen extends AbstractTestCase {
 
diff --git a/tests/testbench/com/vaadin/tests/components/embedded/EmbeddedApplet.java b/tests/testbench/com/vaadin/tests/components/embedded/EmbeddedApplet.java
index 1bb3e7abe2..5091f3a929 100644
--- a/tests/testbench/com/vaadin/tests/components/embedded/EmbeddedApplet.java
+++ b/tests/testbench/com/vaadin/tests/components/embedded/EmbeddedApplet.java
@@ -38,6 +38,6 @@ public class EmbeddedApplet extends TestBase {
 
         Window window = new Window("Testwindow");
         window.addComponent(new Label("I am inside the window"));
-        applet.getRoot().addWindow(window);
+        applet.getUI().addWindow(window);
     }
 }
diff --git a/tests/testbench/com/vaadin/tests/components/embedded/EmbeddedPdf.java b/tests/testbench/com/vaadin/tests/components/embedded/EmbeddedPdf.java
index c3854d2420..252229cbe3 100644
--- a/tests/testbench/com/vaadin/tests/components/embedded/EmbeddedPdf.java
+++ b/tests/testbench/com/vaadin/tests/components/embedded/EmbeddedPdf.java
@@ -35,7 +35,7 @@ public class EmbeddedPdf extends TestBase {
             }
         }));
 
-        player.getRoot().addWindow(new Window("Testwindow"));
+        player.getUI().addWindow(new Window("Testwindow"));
     }
 
 }
diff --git a/tests/testbench/com/vaadin/tests/components/embeddedbrowser/EmbeddedBrowserIsVisible.html b/tests/testbench/com/vaadin/tests/components/embeddedbrowser/EmbeddedBrowserIsVisible.html
new file mode 100644
index 0000000000..2d76cd48b2
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/components/embeddedbrowser/EmbeddedBrowserIsVisible.html
@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head profile="http://selenium-ide.openqa.org/profiles/test-case">
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+<link rel="selenium.base" href="" />
+<title>EmbeddedBrowserIsVisible</title>
+</head>
+<body>
+<table cellpadding="1" cellspacing="1" border="1">
+<thead>
+<tr><td rowspan="1" colspan="3">EmbeddedBrowserIsVisible</td></tr>
+</thead><tbody>
+<tr>
+	<td>open</td>
+	<td>/run/com.vaadin.tests.components.embeddedbrowser.EmbeddedBrowserIsVisible?restartApplication</td>
+	<td></td>
+</tr>
+<tr>
+	<td>screenCapture</td>
+	<td></td>
+	<td>show_initial</td>
+</tr>
+<tr>
+	<td>click</td>
+	<td>vaadin=runcomvaadintestscomponentsembeddedbrowserEmbeddedBrowserIsVisible::/VVerticalLayout[0]/VVerticalLayout[0]/VHorizontalLayout[0]/VButton[0]/domChild[0]/domChild[0]</td>
+	<td></td>
+</tr>
+<tr>
+	<td>screenCapture</td>
+	<td></td>
+	<td>show_hello</td>
+</tr>
+<tr>
+	<td>click</td>
+	<td>vaadin=runcomvaadintestscomponentsembeddedbrowserEmbeddedBrowserIsVisible::/VVerticalLayout[0]/VVerticalLayout[0]/VHorizontalLayout[0]/VButton[1]/domChild[0]/domChild[0]</td>
+	<td></td>
+</tr>
+<tr>
+	<td>screenCapture</td>
+	<td></td>
+	<td>show_lorem</td>
+</tr>
+<tr>
+	<td>click</td>
+	<td>vaadin=runcomvaadintestscomponentsembeddedbrowserEmbeddedBrowserIsVisible::/VVerticalLayout[0]/VVerticalLayout[0]/VHorizontalLayout[0]/VButton[2]/domChild[0]/domChild[0]</td>
+	<td></td>
+</tr>
+<tr>
+	<td>screenCapture</td>
+	<td></td>
+	<td>show_alternative_text</td>
+</tr>
+<tr>
+	<td>click</td>
+	<td>vaadin=runcomvaadintestscomponentsembeddedbrowserEmbeddedBrowserIsVisible::/VVerticalLayout[0]/VVerticalLayout[0]/VHorizontalLayout[0]/VButton[1]/domChild[0]/domChild[0]</td>
+	<td></td>
+</tr>
+<tr>
+	<td>screenCapture</td>
+	<td></td>
+	<td>show_lorem2</td>
+</tr>
+
+</tbody></table>
+</body>
+</html>
diff --git a/tests/testbench/com/vaadin/tests/components/embeddedbrowser/EmbeddedBrowserIsVisible.java b/tests/testbench/com/vaadin/tests/components/embeddedbrowser/EmbeddedBrowserIsVisible.java
new file mode 100644
index 0000000000..fdf9405855
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/components/embeddedbrowser/EmbeddedBrowserIsVisible.java
@@ -0,0 +1,112 @@
+package com.vaadin.tests.components.embeddedbrowser;
+
+import java.io.ByteArrayInputStream;
+import java.io.InputStream;
+import java.io.UnsupportedEncodingException;
+
+import com.vaadin.terminal.StreamResource;
+import com.vaadin.tests.components.TestBase;
+import com.vaadin.ui.Button;
+import com.vaadin.ui.Button.ClickEvent;
+import com.vaadin.ui.EmbeddedBrowser;
+import com.vaadin.ui.HorizontalLayout;
+
+public class EmbeddedBrowserIsVisible extends TestBase {
+
+    @Override
+    protected void setup() {
+
+        HorizontalLayout buttonLayout = new HorizontalLayout();
+        addComponent(buttonLayout);
+
+        Button page1 = new Button("Hello World");
+        buttonLayout.addComponent(page1);
+
+        Button page2 = new Button("Lorem ipsum");
+        buttonLayout.addComponent(page2);
+
+        Button page3 = new Button("null");
+        buttonLayout.addComponent(page3);
+
+        final EmbeddedBrowser browser = new EmbeddedBrowser();
+        browser.setDebugId("browser");
+        browser.setWidth("600px");
+        browser.setHeight("300px");
+        browser.setAlternateText("Browser alternative text");
+        final TextSource textSource = new TextSource("initial");
+        final StreamResource textResource = new StreamResource(textSource,
+                "initial.txt", this);
+        textResource.setMIMEType("text/plain");
+        browser.setSource(textResource);
+        addComponent(browser);
+
+        page1.addListener(new Button.ClickListener() {
+
+            public void buttonClick(ClickEvent event) {
+                TextSource helloSource = new TextSource("Hello World");
+                StreamResource helloResource = new StreamResource(helloSource,
+                        "helloworld.txt", EmbeddedBrowserIsVisible.this);
+                helloResource.setMIMEType("text/plain");
+                browser.setSource(helloResource);
+            }
+        });
+
+        page2.addListener(new Button.ClickListener() {
+
+            public void buttonClick(ClickEvent event) {
+                TextSource helloSource = new TextSource("Lorem Ipsum");
+                StreamResource helloResource = new StreamResource(helloSource,
+                        "loremipsum.txt", EmbeddedBrowserIsVisible.this);
+                helloResource.setMIMEType("text/plain");
+                browser.setSource(helloResource);
+            }
+        });
+
+        page3.addListener(new Button.ClickListener() {
+
+            public void buttonClick(ClickEvent event) {
+                browser.setSource(null);
+            }
+        });
+    }
+
+    @Override
+    protected String getDescription() {
+        return "Embedded browser should be visible for all browsers";
+    }
+
+    @Override
+    protected Integer getTicketNumber() {
+        return null;
+    }
+
+    public class TextSource implements StreamResource.StreamSource {
+        private String text;
+
+        public TextSource(String text) {
+            this.text = text;
+        }
+
+        public InputStream getStream() {
+
+            StringBuilder sb = new StringBuilder();
+            for (int i = 0; i < 200; ++i) {
+                sb.append(text);
+                sb.append("\n");
+            }
+
+            ByteArrayInputStream istream;
+            try {
+                istream = new ByteArrayInputStream(sb.toString().getBytes(
+                        "UTF-8"));
+            } catch (UnsupportedEncodingException e) {
+                // TODO Auto-generated catch block
+                e.printStackTrace();
+                return null;
+            }
+            return istream; // new DownloadStream (istream,null,null);
+
+        }
+    }
+
+}
diff --git a/tests/testbench/com/vaadin/tests/components/flash/FlashIsVisible.html b/tests/testbench/com/vaadin/tests/components/flash/FlashIsVisible.html
new file mode 100644
index 0000000000..82834cf405
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/components/flash/FlashIsVisible.html
@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head profile="http://selenium-ide.openqa.org/profiles/test-case">
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+<link rel="selenium.base" href="" />
+<title>New Test</title>
+</head>
+<body>
+<table cellpadding="1" cellspacing="1" border="1">
+<thead>
+<tr><td rowspan="1" colspan="3">New Test</td></tr>
+</thead><tbody>
+<tr>
+	<td>open</td>
+	<td>/run/com.vaadin.tests.components.flash.FlashIsVisible</td>
+	<td></td>
+</tr>
+<!--Allow the flash plugin to load before taking the screenshot-->
+<tr>
+	<td>pause</td>
+	<td>5000</td>
+	<td></td>
+</tr>
+<tr>
+	<td>screenCapture</td>
+	<td></td>
+	<td></td>
+</tr>
+
+</tbody></table>
+</body>
+</html>
diff --git a/tests/testbench/com/vaadin/tests/components/flash/FlashIsVisible.java b/tests/testbench/com/vaadin/tests/components/flash/FlashIsVisible.java
new file mode 100644
index 0000000000..66cb8819d4
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/components/flash/FlashIsVisible.java
@@ -0,0 +1,31 @@
+package com.vaadin.tests.components.flash;
+
+import com.vaadin.terminal.ExternalResource;
+import com.vaadin.tests.components.TestBase;
+import com.vaadin.ui.Flash;
+
+public class FlashIsVisible extends TestBase {
+
+    @Override
+    protected void setup() {
+        Flash player = new Flash();
+        player.setWidth("400px");
+        player.setHeight("300px");
+        String url = "http://www.youtube.com/v/qQ9N742QB4g&autoplay=0";
+        player.setSource(new ExternalResource(url));
+        addComponent(player);
+    }
+
+    @Override
+    protected String getDescription() {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+    @Override
+    protected Integer getTicketNumber() {
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+}
diff --git a/tests/testbench/com/vaadin/tests/components/flash/FlashPresentation.java b/tests/testbench/com/vaadin/tests/components/flash/FlashPresentation.java
new file mode 100644
index 0000000000..843e61ace1
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/components/flash/FlashPresentation.java
@@ -0,0 +1,33 @@
+package com.vaadin.tests.components.flash;
+
+import com.vaadin.terminal.ExternalResource;
+import com.vaadin.tests.components.TestBase;
+import com.vaadin.ui.Flash;
+
+public class FlashPresentation extends TestBase {
+
+    @Override
+    protected String getDescription() {
+        return "The embedded flash should have the movie parameter set to \"someRandomValue\" and an allowFullScreen parameter set to \"true\".";
+    }
+
+    @Override
+    protected Integer getTicketNumber() {
+        return 3367;
+    }
+
+    @Override
+    public void setup() {
+        Flash player = new Flash();
+        player.setWidth("400px");
+        player.setHeight("300px");
+        String url = "http://www.youtube.com/v/qQ9N742QB4g&autoplay=1";
+        player.setSource(new ExternalResource(url));
+        player.setParameter("movie", "someRandomValue");
+        player.setParameter("allowFullScreen", "true");
+        player.setAlternateText("Flash alternative text");
+
+        addComponent(player);
+    }
+
+}
diff --git a/tests/testbench/com/vaadin/tests/components/form/UndefinedWideFormWithRelativeWideFooter.java b/tests/testbench/com/vaadin/tests/components/form/UndefinedWideFormWithRelativeWideFooter.java
index 21430d8936..b34db2170e 100644
--- a/tests/testbench/com/vaadin/tests/components/form/UndefinedWideFormWithRelativeWideFooter.java
+++ b/tests/testbench/com/vaadin/tests/components/form/UndefinedWideFormWithRelativeWideFooter.java
@@ -5,7 +5,7 @@ import com.vaadin.ui.Alignment;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Form;
 import com.vaadin.ui.HorizontalLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 @SuppressWarnings("serial")
diff --git a/tests/testbench/com/vaadin/tests/components/formlayout/FormLayoutErrorHover.java b/tests/testbench/com/vaadin/tests/components/formlayout/FormLayoutErrorHover.java
index 184f8a9261..a73c88cf73 100644
--- a/tests/testbench/com/vaadin/tests/components/formlayout/FormLayoutErrorHover.java
+++ b/tests/testbench/com/vaadin/tests/components/formlayout/FormLayoutErrorHover.java
@@ -16,11 +16,11 @@
 package com.vaadin.tests.components.formlayout;
 
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.ui.FormLayout;
 import com.vaadin.ui.PopupDateField;
 
-public class FormLayoutErrorHover extends AbstractTestRoot {
+public class FormLayoutErrorHover extends AbstractTestUI {
 
     @Override
     protected void setup(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/components/formlayout/TableInFormLayoutCausesScrolling.java b/tests/testbench/com/vaadin/tests/components/formlayout/TableInFormLayoutCausesScrolling.java
index bbe88b1770..360c559086 100644
--- a/tests/testbench/com/vaadin/tests/components/formlayout/TableInFormLayoutCausesScrolling.java
+++ b/tests/testbench/com/vaadin/tests/components/formlayout/TableInFormLayoutCausesScrolling.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.components.formlayout;
 
 import com.vaadin.tests.components.AbstractTestCase;
 import com.vaadin.ui.FormLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.TextField;
 
diff --git a/tests/testbench/com/vaadin/tests/components/image/ImageAltText.html b/tests/testbench/com/vaadin/tests/components/image/ImageAltText.html
new file mode 100644
index 0000000000..743aa5caaf
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/components/image/ImageAltText.html
@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head profile="http://selenium-ide.openqa.org/profiles/test-case">
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+<link rel="selenium.base" href="" />
+<title>ImageAltText</title>
+</head>
+<body>
+<table cellpadding="1" cellspacing="1" border="1">
+<thead>
+<tr><td rowspan="1" colspan="3">ImageAltText</td></tr>
+</thead><tbody>
+<tr>
+	<td>open</td>
+	<td>/run/com.vaadin.tests.components.image.ImageAltText?restartApplication</td>
+	<td></td>
+</tr>
+<tr>
+	<td>assertAttribute</td>
+	<td>vaadin=runcomvaadintestscomponentsimageImageAltText::/VVerticalLayout[0]/VVerticalLayout[0]/VImage[0]@alt</td>
+	<td>Original alt text</td>
+</tr>
+<tr>
+	<td>click</td>
+	<td>vaadin=runcomvaadintestscomponentsimageImageAltText::/VVerticalLayout[0]/VVerticalLayout[0]/VButton[0]/domChild[0]</td>
+	<td></td>
+</tr>
+<tr>
+	<td>assertAttribute</td>
+	<td>vaadin=runcomvaadintestscomponentsimageImageAltText::/VVerticalLayout[0]/VVerticalLayout[0]/VImage[0]@alt</td>
+	<td>New alt text!</td>
+</tr>
+<tr>
+	<td>screenCapture</td>
+	<td></td>
+	<td>image_alt_text</td>
+</tr>
+
+</tbody></table>
+</body>
+</html>
diff --git a/tests/testbench/com/vaadin/tests/components/image/ImageAltText.java b/tests/testbench/com/vaadin/tests/components/image/ImageAltText.java
new file mode 100644
index 0000000000..1f787fd64f
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/components/image/ImageAltText.java
@@ -0,0 +1,38 @@
+package com.vaadin.tests.components.image;
+
+import com.vaadin.terminal.ThemeResource;
+import com.vaadin.tests.components.TestBase;
+import com.vaadin.ui.Button;
+import com.vaadin.ui.Button.ClickEvent;
+import com.vaadin.ui.Image;
+
+public class ImageAltText extends TestBase {
+
+    @Override
+    protected void setup() {
+        final Image image = new Image("Caption", new ThemeResource(
+                "../runo/icons/64/ok.png"));
+        image.setDebugId("image");
+        image.setAlternateText("Original alt text");
+        addComponent(image);
+
+        Button changeAltTexts = new Button("Change alt text",
+                new Button.ClickListener() {
+            public void buttonClick(ClickEvent event) {
+                image.setAlternateText("New alt text!");
+            }
+        });
+        addComponent(changeAltTexts);
+    }
+
+    @Override
+    protected String getDescription() {
+        return "Test alternative text of image";
+    }
+
+    @Override
+    protected Integer getTicketNumber() {
+        return null;
+    }
+
+}
diff --git a/tests/testbench/com/vaadin/tests/components/image/ImageClicks.html b/tests/testbench/com/vaadin/tests/components/image/ImageClicks.html
new file mode 100644
index 0000000000..14afaab98d
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/components/image/ImageClicks.html
@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head profile="http://selenium-ide.openqa.org/profiles/test-case">
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+<link rel="selenium.base" href="" />
+<title>ImageClicks</title>
+</head>
+<body>
+<table cellpadding="1" cellspacing="1" border="1">
+<thead>
+<tr><td rowspan="1" colspan="3">ImageClicks</td></tr>
+</thead><tbody>
+<tr>
+	<td>open</td>
+	<td>/run/com.vaadin.tests.components.image.ImageClicks?restartApplication</td>
+	<td></td>
+</tr>
+<tr>
+	<td>screenCapture</td>
+	<td></td>
+	<td>0_clicks</td>
+</tr>
+<tr>
+	<td>mouseClick</td>
+	<td>vaadin=runcomvaadintestscomponentsimageImageClicks::/VVerticalLayout[0]/VVerticalLayout[0]/VImage[0]</td>
+	<td>129,107</td>
+</tr>
+<tr>
+	<td>screenCapture</td>
+	<td></td>
+	<td>1_click</td>
+</tr>
+<tr>
+	<td>mouseClick</td>
+	<td>vaadin=runcomvaadintestscomponentsimageImageClicks::/VVerticalLayout[0]/VVerticalLayout[0]/VImage[0]</td>
+	<td>129,107</td>
+</tr>
+<tr>
+	<td>screenCapture</td>
+	<td></td>
+	<td>2_clicks</td>
+</tr>
+<tr>
+	<td>mouseClick</td>
+	<td>vaadin=runcomvaadintestscomponentsimageImageClicks::/VVerticalLayout[0]/VVerticalLayout[0]/VImage[0]</td>
+	<td>273,273</td>
+</tr>
+<tr>
+	<td>screenCapture</td>
+	<td></td>
+	<td>3_clicks</td>
+</tr>
+
+</tbody></table>
+</body>
+</html>
diff --git a/tests/testbench/com/vaadin/tests/components/image/ImageClicks.java b/tests/testbench/com/vaadin/tests/components/image/ImageClicks.java
new file mode 100644
index 0000000000..394e38a106
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/components/image/ImageClicks.java
@@ -0,0 +1,133 @@
+package com.vaadin.tests.components.image;
+
+import java.awt.Color;
+import java.awt.Graphics;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+import javax.imageio.ImageIO;
+
+import com.vaadin.event.MouseEvents.ClickEvent;
+import com.vaadin.event.MouseEvents.ClickListener;
+import com.vaadin.terminal.StreamResource;
+import com.vaadin.tests.components.TestBase;
+import com.vaadin.ui.Image;
+import com.vaadin.ui.Label;
+
+public class ImageClicks extends TestBase {
+
+    private int clickCounter = 0;
+
+    @Override
+    protected void setup() {
+
+        final Label label = new Label(labelText());
+        addComponent(label);
+
+        Image image = new Image();
+        final MyImageSource imageSource = new MyImageSource();
+        final StreamResource imageResource = new StreamResource(imageSource,
+                "testimage.png", this);
+        image.setSource(imageResource);
+        image.addListener(new ClickListener() {
+
+            public void click(ClickEvent event) {
+                ++clickCounter;
+                label.setValue(labelText());
+            }
+
+        });
+        addComponent(image);
+
+    }
+
+    private String labelText() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("Image clicked ");
+        sb.append(clickCounter);
+        sb.append(" times.");
+        return sb.toString();
+    }
+
+    @Override
+    protected String getDescription() {
+        return "Test click event handling of images";
+    }
+
+    @Override
+    protected Integer getTicketNumber() {
+        return null;
+    }
+
+    public class MyImageSource implements StreamResource.StreamSource {
+        public MyImageSource() {
+        }
+
+        int intervalPos(int pos, int resolution, int cells) {
+            return (int) Math.round(pos * resolution / (cells * 1.0));
+        }
+
+        public InputStream getStream() {
+            // Create an image and draw some background on it.
+            BufferedImage image = new BufferedImage(300, 300,
+                    BufferedImage.TYPE_INT_RGB);
+            Graphics drawable = image.getGraphics();
+
+            // Background
+            drawable.setColor(Color.white);
+            drawable.fillRect(0, 0, 300, 300);
+
+            final int rows = 4;
+            final int cols = 4;
+
+            // Grid
+            for (int row = 0; row < rows; row++) {
+                int gridy = intervalPos(row, 300, rows);
+                int gridynext = intervalPos(row + 1, 300, rows);
+
+                // Horizontal grid line
+                if (row > 0) {
+                    drawable.setColor(Color.lightGray);
+                    drawable.drawLine(0, gridy, 300 - 1, gridy);
+                }
+
+                for (int col = 0; col < cols; col++) {
+                    int gridx = intervalPos(col, 300, cols);
+                    int gridxnext = intervalPos(col + 1, 300, cols);
+
+                    // Vertical grid line
+                    if (row == 0 && col > 0) {
+                        drawable.setColor(Color.lightGray);
+                        drawable.drawLine(gridx, 0, gridx, 300 - 1);
+                    }
+
+                    // Cell
+                    if (Math.random() < 0.5f) {
+                        drawable.setColor(Color.white);
+                    } else {
+                        drawable.setColor(Color.black);
+                    }
+                    drawable.fillRect(gridx + 1, gridy + 1, gridxnext - gridx
+                            - 1, gridynext - gridy - 1);
+                }
+            }
+
+            try {
+                // Write the image to a buffer.
+                ByteArrayOutputStream imagebuffer = new ByteArrayOutputStream();
+                ImageIO.write(image, "png", imagebuffer);
+
+                // Return a stream from the buffer.
+                ByteArrayInputStream istream = new ByteArrayInputStream(
+                        imagebuffer.toByteArray());
+                return istream; // new DownloadStream (istream,null,null);
+            } catch (IOException e) {
+                return null;
+            }
+        }
+
+    }
+}
diff --git a/tests/testbench/com/vaadin/tests/components/javascriptcomponent/BasicJavaScriptComponent.java b/tests/testbench/com/vaadin/tests/components/javascriptcomponent/BasicJavaScriptComponent.java
index 0b732e5948..a0df85a5b3 100644
--- a/tests/testbench/com/vaadin/tests/components/javascriptcomponent/BasicJavaScriptComponent.java
+++ b/tests/testbench/com/vaadin/tests/components/javascriptcomponent/BasicJavaScriptComponent.java
@@ -29,13 +29,13 @@ import com.vaadin.shared.ui.JavaScriptComponentState;
 import com.vaadin.terminal.ClassResource;
 import com.vaadin.terminal.WrappedRequest;
 import com.vaadin.terminal.gwt.server.ResourceReference;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.tests.util.Log;
 import com.vaadin.ui.AbstractJavaScriptComponent;
 import com.vaadin.ui.HasComponents;
 import com.vaadin.ui.JavaScriptFunction;
 
-public class BasicJavaScriptComponent extends AbstractTestRoot {
+public class BasicJavaScriptComponent extends AbstractTestUI {
 
     public interface TestRpc extends ServerRpc, ClientRpc {
         public void sendRpc(String message);
diff --git a/tests/testbench/com/vaadin/tests/components/label/MarginsInLabels.java b/tests/testbench/com/vaadin/tests/components/label/MarginsInLabels.java
index b1cf2957be..18d3b1e8ed 100644
--- a/tests/testbench/com/vaadin/tests/components/label/MarginsInLabels.java
+++ b/tests/testbench/com/vaadin/tests/components/label/MarginsInLabels.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.components.label;
 
 import com.vaadin.shared.ui.label.ContentMode;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.ui.AbstractLayout;
 import com.vaadin.ui.Accordion;
 import com.vaadin.ui.GridLayout;
@@ -10,7 +10,7 @@ import com.vaadin.ui.Label;
 import com.vaadin.ui.TabSheet;
 import com.vaadin.ui.VerticalLayout;
 
-public class MarginsInLabels extends AbstractTestRoot {
+public class MarginsInLabels extends AbstractTestUI {
 
     @Override
     protected void setup(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/components/loginform/LoginFormUIInLoginHandler.html b/tests/testbench/com/vaadin/tests/components/loginform/LoginFormUIInLoginHandler.html
new file mode 100755
index 0000000000..9a80ce6013
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/components/loginform/LoginFormUIInLoginHandler.html
@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head profile="http://selenium-ide.openqa.org/profiles/test-case">
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+<link rel="selenium.base" href="http://arturwin.office.itmill.com:8888/" />
+<title>New Test</title>
+</head>
+<body>
+<table cellpadding="1" cellspacing="1" border="1">
+<thead>
+<tr><td rowspan="1" colspan="3">New Test</td></tr>
+</thead><tbody>
+<tr>
+	<td>open</td>
+	<td>/run/com.vaadin.tests.components.loginform.LoginFormUIInLoginHandler?restartApplication</td>
+	<td></td>
+</tr>
+<tr>
+	<td>waitForElementPresent</td>
+	<td>username</td>
+	<td></td>
+</tr>
+<tr>
+	<td>enterCharacter</td>
+	<td>username</td>
+	<td>abc</td>
+</tr>
+<tr>
+	<td>enterCharacter</td>
+	<td>password</td>
+	<td>def</td>
+</tr>
+<tr>
+	<td>click</td>
+	<td>//form[@id='loginf']/div[5]/div/span/span</td>
+	<td></td>
+</tr>
+<tr>
+	<td>pauseAndWait</td>
+	<td>1000</td>
+	<td></td>
+</tr>
+<tr>
+	<td>assertText</td>
+	<td>vaadin=runcomvaadintestscomponentsloginformLoginFormUIInLoginHandler::/VVerticalLayout[0]/VVerticalLayout[0]/VLabel[0]</td>
+	<td>UI.getCurrent().data: This UI</td>
+</tr>
+<tr>
+	<td>assertText</td>
+	<td>vaadin=runcomvaadintestscomponentsloginformLoginFormUIInLoginHandler::/VVerticalLayout[0]/VVerticalLayout[0]/VLabel[1]</td>
+	<td>event.getSource().data: This UI</td>
+</tr>
+
+</tbody></table>
+</body>
+</html>
diff --git a/tests/testbench/com/vaadin/tests/components/loginform/LoginFormRootInLoginHandler.java b/tests/testbench/com/vaadin/tests/components/loginform/LoginFormUIInLoginHandler.java
index 2c0a8744fc..b3ebb02751 100755
--- a/tests/testbench/com/vaadin/tests/components/loginform/LoginFormRootInLoginHandler.java
+++ b/tests/testbench/com/vaadin/tests/components/loginform/LoginFormUIInLoginHandler.java
@@ -5,9 +5,9 @@ import com.vaadin.ui.Label;
 import com.vaadin.ui.LoginForm;

 import com.vaadin.ui.LoginForm.LoginEvent;

 import com.vaadin.ui.LoginForm.LoginListener;

-import com.vaadin.ui.Root;

+import com.vaadin.ui.UI;

 

-public class LoginFormRootInLoginHandler extends TestBase {

+public class LoginFormUIInLoginHandler extends TestBase {

 

     @Override

     protected void setup() {

@@ -16,14 +16,14 @@ public class LoginFormRootInLoginHandler extends TestBase {
 

             @Override

             public void onLogin(LoginEvent event) {

-                Root r1 = Root.getCurrent();

+                UI r1 = UI.getCurrent();

                 if (r1 != null) {

-                    addComponent(new Label("Root.getCurrent().data: "

+                    addComponent(new Label("UI.getCurrent().data: "

                             + r1.getData()));

                 } else {

-                    addComponent(new Label("Root.getCurrent() is null"));

+                    addComponent(new Label("UI.getCurrent() is null"));

                 }

-                Root r2 = ((LoginForm) event.getSource()).getRoot();

+                UI r2 = ((LoginForm) event.getSource()).getUI();

                 if (r2 != null) {

                     addComponent(new Label("event.getSource().data: "

                             + r2.getData()));

@@ -34,7 +34,7 @@ public class LoginFormRootInLoginHandler extends TestBase {
             }

         });

         addComponent(lf);

-        getLayout().getRoot().setData("This root");

+        getLayout().getUI().setData("This UI");

     }

 

     @Override

diff --git a/tests/testbench/com/vaadin/tests/components/loginform/LoginFormWithMultipleWindows.java b/tests/testbench/com/vaadin/tests/components/loginform/LoginFormWithMultipleWindows.java
index 83f89f0214..480c186df7 100644
--- a/tests/testbench/com/vaadin/tests/components/loginform/LoginFormWithMultipleWindows.java
+++ b/tests/testbench/com/vaadin/tests/components/loginform/LoginFormWithMultipleWindows.java
@@ -5,14 +5,14 @@ import com.vaadin.terminal.WrappedRequest;
 import com.vaadin.ui.LoginForm;
 import com.vaadin.ui.LoginForm.LoginEvent;
 import com.vaadin.ui.LoginForm.LoginListener;
-import com.vaadin.ui.Root;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI;
+import com.vaadin.ui.UI.LegacyWindow;
 
 @SuppressWarnings("serial")
 public class LoginFormWithMultipleWindows extends Application {
 
     @Override
-    protected Root getRoot(WrappedRequest request) {
+    protected UI getUI(WrappedRequest request) {
         return new LoginFormWindow();
     }
 
diff --git a/tests/testbench/com/vaadin/tests/components/menubar/MenuBarInSplitPanel.java b/tests/testbench/com/vaadin/tests/components/menubar/MenuBarInSplitPanel.java
index 2a6f952c0a..59aebd0bd7 100644
--- a/tests/testbench/com/vaadin/tests/components/menubar/MenuBarInSplitPanel.java
+++ b/tests/testbench/com/vaadin/tests/components/menubar/MenuBarInSplitPanel.java
@@ -4,7 +4,7 @@ import com.vaadin.tests.components.AbstractTestCase;
 import com.vaadin.ui.HorizontalSplitPanel;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.MenuBar;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Tree;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/components/menubar/MenuBarRunsOutOfBrowser.java b/tests/testbench/com/vaadin/tests/components/menubar/MenuBarRunsOutOfBrowser.java
index 33e6c0b4a9..2c4a975f9b 100644
--- a/tests/testbench/com/vaadin/tests/components/menubar/MenuBarRunsOutOfBrowser.java
+++ b/tests/testbench/com/vaadin/tests/components/menubar/MenuBarRunsOutOfBrowser.java
@@ -4,7 +4,7 @@ import com.vaadin.terminal.ThemeResource;
 import com.vaadin.tests.components.AbstractTestCase;
 import com.vaadin.ui.Alignment;
 import com.vaadin.ui.MenuBar;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class MenuBarRunsOutOfBrowser extends AbstractTestCase {
diff --git a/tests/testbench/com/vaadin/tests/components/orderedlayout/OrderedLayoutCases.java b/tests/testbench/com/vaadin/tests/components/orderedlayout/OrderedLayoutCases.java
index aeae09e7b9..a10e69e188 100644
--- a/tests/testbench/com/vaadin/tests/components/orderedlayout/OrderedLayoutCases.java
+++ b/tests/testbench/com/vaadin/tests/components/orderedlayout/OrderedLayoutCases.java
@@ -9,7 +9,7 @@ import com.vaadin.annotations.Theme;
 import com.vaadin.data.Property.ValueChangeEvent;
 import com.vaadin.data.Property.ValueChangeListener;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.tests.util.TestUtils;
 import com.vaadin.ui.AbstractOrderedLayout;
 import com.vaadin.ui.Alignment;
@@ -22,57 +22,58 @@ import com.vaadin.ui.NativeSelect;
 import com.vaadin.ui.VerticalLayout;
 
 @Theme("tests-components")
-public class OrderedLayoutCases extends AbstractTestRoot {
+public class OrderedLayoutCases extends AbstractTestUI {
+
     private static final String[] dimensionValues = { "-1px", "5px", "350px",
-            "800px", "100%", "50%" };
+        "800px", "100%", "50%" };
 
     private static class SampleChild extends VerticalLayout {
         public SampleChild() {
             setStyleName("sampleChild");
             addComponent(createSimpleSelector("Child width",
                     new ValueChangeListener() {
-                        @Override
-                        public void valueChange(ValueChangeEvent event) {
-                            setWidth(event.getProperty().getValue().toString());
-                        }
-                    }, dimensionValues));
+                @Override
+                public void valueChange(ValueChangeEvent event) {
+                    setWidth(event.getProperty().getValue().toString());
+                }
+            }, dimensionValues));
             addComponent(createSimpleSelector("Child height",
                     new ValueChangeListener() {
-                        @Override
-                        public void valueChange(ValueChangeEvent event) {
-                            setHeight(event.getProperty().getValue().toString());
-                        }
-                    }, dimensionValues));
+                @Override
+                public void valueChange(ValueChangeEvent event) {
+                    setHeight(event.getProperty().getValue().toString());
+                }
+            }, dimensionValues));
             addComponent(createSimpleSelector("Caption",
                     new ValueChangeListener() {
-                        @Override
-                        public void valueChange(ValueChangeEvent event) {
-                            String value = event.getProperty().getValue()
-                                    .toString();
-                            if (value.length() == 0) {
-                                setCaption(null);
-                            } else if (value.equals("Long")) {
-                                setCaption("A rather long caption just to see what happens");
-                            } else {
-                                setCaption(value);
-                            }
-                        }
-                    }, "", "Short", "Long"));
+                @Override
+                public void valueChange(ValueChangeEvent event) {
+                    String value = event.getProperty().getValue()
+                            .toString();
+                    if (value.length() == 0) {
+                        setCaption(null);
+                    } else if (value.equals("Long")) {
+                        setCaption("A rather long caption just to see what happens");
+                    } else {
+                        setCaption(value);
+                    }
+                }
+            }, "", "Short", "Long"));
 
             addComponent(createSimpleSelector("Expand ratio",
                     new ValueChangeListener() {
-                        @Override
-                        public void valueChange(ValueChangeEvent event) {
-                            AbstractOrderedLayout parent = (AbstractOrderedLayout) getParent();
-                            if (parent == null) {
-                                return;
-                            }
-                            String value = event.getProperty().getValue()
-                                    .toString();
-                            parent.setExpandRatio(SampleChild.this,
-                                    Float.parseFloat(value));
-                        }
-                    }, "0", "1", "2"));
+                @Override
+                public void valueChange(ValueChangeEvent event) {
+                    AbstractOrderedLayout parent = (AbstractOrderedLayout) getParent();
+                    if (parent == null) {
+                        return;
+                    }
+                    String value = event.getProperty().getValue()
+                            .toString();
+                    parent.setExpandRatio(SampleChild.this,
+                            Float.parseFloat(value));
+                }
+            }, "0", "1", "2"));
 
             // Why is Alignment not an enum? Now we have to use reflection just
             // to get the different values as hardcoding is never an option! ;)
@@ -85,29 +86,29 @@ public class OrderedLayoutCases extends AbstractTestRoot {
             }
             addComponent(createSimpleSelector("Alignment",
                     new ValueChangeListener() {
-                        @Override
-                        public void valueChange(ValueChangeEvent event) {
-                            String value = event.getProperty().getValue()
-                                    .toString();
-                            AlignmentHandler parent = (AlignmentHandler) getParent();
-                            if (parent == null) {
-                                return;
-                            }
-                            try {
-                                Field field = Alignment.class
-                                        .getDeclaredField(value);
-                                Alignment alignment = (Alignment) field
-                                        .get(null);
-                                parent.setComponentAlignment(SampleChild.this,
-                                        alignment);
-                            } catch (Exception e) {
-                                throw new RuntimeException(e);
-                            }
-                        }
-                    }, alignmentValues, "TOP_LEFT")); // Sorry for not using
-                                                      // more reflection magic
-                                                      // just to find the
-                                                      // default value...
+                @Override
+                public void valueChange(ValueChangeEvent event) {
+                    String value = event.getProperty().getValue()
+                            .toString();
+                    AlignmentHandler parent = (AlignmentHandler) getParent();
+                    if (parent == null) {
+                        return;
+                    }
+                    try {
+                        Field field = Alignment.class
+                                .getDeclaredField(value);
+                        Alignment alignment = (Alignment) field
+                                .get(null);
+                        parent.setComponentAlignment(SampleChild.this,
+                                alignment);
+                    } catch (Exception e) {
+                        throw new RuntimeException(e);
+                    }
+                }
+            }, alignmentValues, "TOP_LEFT")); // Sorry for not using
+            // more reflection magic
+            // just to find the
+            // default value...
 
         }
     }
@@ -118,12 +119,12 @@ public class OrderedLayoutCases extends AbstractTestRoot {
     @Override
     protected void setup(WrappedRequest request) {
         TestUtils
-                .injectCSS(
-                        getRoot(),
-                        ".sampleChild, .theLayout {border: 1px solid black;}"
-                                + ".theLayout > div:first-child {background: aqua;}"
-                                + ".theLayout > div:first-child + div {background: yellow;}"
-                                + ".theLayout > div:first-child + div + div {background: lightgrey;}");
+        .injectCSS(
+                getUI(),
+                ".sampleChild, .theLayout {border: 1px solid black;}"
+                        + ".theLayout > div:first-child {background: aqua;}"
+                        + ".theLayout > div:first-child + div {background: yellow;}"
+                        + ".theLayout > div:first-child + div + div {background: lightgrey;}");
 
         currentLayout = new HorizontalLayout();
         for (int i = 0; i < 3; i++) {
@@ -135,196 +136,196 @@ public class OrderedLayoutCases extends AbstractTestRoot {
 
         sizeBar.addComponent(createSimpleSelector("Layout width",
                 new ValueChangeListener() {
-                    @Override
-                    public void valueChange(ValueChangeEvent event) {
-                        currentLayout.setWidth(event.getProperty().getValue()
-                                .toString());
-                    }
-                }, dimensionValues));
+            @Override
+            public void valueChange(ValueChangeEvent event) {
+                currentLayout.setWidth(event.getProperty().getValue()
+                        .toString());
+            }
+        }, dimensionValues));
         sizeBar.addComponent(createSimpleSelector("Layout height",
                 new ValueChangeListener() {
-                    @Override
-                    public void valueChange(ValueChangeEvent event) {
-                        currentLayout.setHeight(event.getProperty().getValue()
-                                .toString());
-                    }
-                }, dimensionValues));
+            @Override
+            public void valueChange(ValueChangeEvent event) {
+                currentLayout.setHeight(event.getProperty().getValue()
+                        .toString());
+            }
+        }, dimensionValues));
         sizeBar.addComponent(createSimpleSelector("Spacing",
                 new ValueChangeListener() {
-                    @Override
-                    public void valueChange(ValueChangeEvent event) {
-                        currentLayout.setSpacing(Boolean.parseBoolean(event
-                                .getProperty().getValue().toString()));
-                    }
-                }, "false", "true"));
+            @Override
+            public void valueChange(ValueChangeEvent event) {
+                currentLayout.setSpacing(Boolean.parseBoolean(event
+                        .getProperty().getValue().toString()));
+            }
+        }, "false", "true"));
         sizeBar.addComponent(createSimpleSelector("Margin",
                 new ValueChangeListener() {
-                    @Override
-                    public void valueChange(ValueChangeEvent event) {
-                        currentLayout.setMargin(Boolean.parseBoolean(event
-                                .getProperty().getValue().toString()));
-                    }
-                }, "false", "true"));
+            @Override
+            public void valueChange(ValueChangeEvent event) {
+                currentLayout.setMargin(Boolean.parseBoolean(event
+                        .getProperty().getValue().toString()));
+            }
+        }, "false", "true"));
         sizeBar.addComponent(createSimpleSelector("Direction",
                 new ValueChangeListener() {
-                    @Override
-                    public void valueChange(ValueChangeEvent event) {
-                        Object value = event.getProperty().getValue();
-
-                        AbstractOrderedLayout newLayout;
-                        if (value.equals("Horizontal")) {
-                            newLayout = new HorizontalLayout();
-                        } else {
-                            newLayout = new VerticalLayout();
-                        }
-
-                        while (currentLayout.getComponentCount() > 0) {
-                            newLayout.addComponent(currentLayout
-                                    .getComponent(0));
-                        }
-                        newLayout.setStyleName("theLayout");
-
-                        newLayout.setHeight(currentLayout.getHeight(),
-                                currentLayout.getHeightUnits());
-                        newLayout.setWidth(currentLayout.getWidth(),
-                                currentLayout.getWidthUnits());
-
-                        newLayout.setMargin(currentLayout.getMargin());
-                        newLayout.setSpacing(currentLayout.isSpacing());
-
-                        getLayout().replaceComponent(currentLayout, newLayout);
-                        getLayout().setExpandRatio(newLayout, 1);
-                        currentLayout = newLayout;
-                    }
-                }, "Horizontal", "Vertical"));
+            @Override
+            public void valueChange(ValueChangeEvent event) {
+                Object value = event.getProperty().getValue();
+
+                AbstractOrderedLayout newLayout;
+                if (value.equals("Horizontal")) {
+                    newLayout = new HorizontalLayout();
+                } else {
+                    newLayout = new VerticalLayout();
+                }
+
+                while (currentLayout.getComponentCount() > 0) {
+                    newLayout.addComponent(currentLayout
+                            .getComponent(0));
+                }
+                newLayout.setStyleName("theLayout");
+
+                newLayout.setHeight(currentLayout.getHeight(),
+                        currentLayout.getHeightUnits());
+                newLayout.setWidth(currentLayout.getWidth(),
+                        currentLayout.getWidthUnits());
+
+                newLayout.setMargin(currentLayout.getMargin());
+                newLayout.setSpacing(currentLayout.isSpacing());
+
+                getLayout().replaceComponent(currentLayout, newLayout);
+                getLayout().setExpandRatio(newLayout, 1);
+                currentLayout = newLayout;
+            }
+        }, "Horizontal", "Vertical"));
 
         HorizontalLayout caseBar = new HorizontalLayout();
         caseBar.addComponent(new Button("Undefined without relative",
                 new ClickListener() {
-                    @Override
-                    public void buttonClick(ClickEvent event) {
-                        resetState();
-                        setState(sizeBar, 2, 1);
-                        // width: 350px to middle child
-                        setChildState(1, 0, 2);
-                        // middle center allign to middle child
-                        setChildState(1, 4, 5);
-                        // long captions to right child
-                        setChildState(2, 2, 2);
-                    }
-                }));
+            @Override
+            public void buttonClick(ClickEvent event) {
+                resetState();
+                setState(sizeBar, 2, 1);
+                // width: 350px to middle child
+                setChildState(1, 0, 2);
+                // middle center allign to middle child
+                setChildState(1, 4, 5);
+                // long captions to right child
+                setChildState(2, 2, 2);
+            }
+        }));
         caseBar.addComponent(new Button("Undefined with relative",
                 new ClickListener() {
-                    @Override
-                    public void buttonClick(ClickEvent event) {
-                        resetState();
-                        // width: 100% to middle child
-                        setChildState(1, 0, 4);
-                    }
-                }));
+            @Override
+            public void buttonClick(ClickEvent event) {
+                resetState();
+                // width: 100% to middle child
+                setChildState(1, 0, 4);
+            }
+        }));
         caseBar.addComponent(new Button("Fixed with overflow",
                 new ClickListener() {
-                    @Override
-                    public void buttonClick(ClickEvent event) {
-                        resetState();
-                        // layout width: 350px
-                        setState(sizeBar, 0, 2);
-                        // layout margin enabled
-                        setState(sizeBar, 3, 1);
-                    }
-                }));
+            @Override
+            public void buttonClick(ClickEvent event) {
+                resetState();
+                // layout width: 350px
+                setState(sizeBar, 0, 2);
+                // layout margin enabled
+                setState(sizeBar, 3, 1);
+            }
+        }));
         caseBar.addComponent(new Button("Fixed with extra space",
                 new ClickListener() {
-                    @Override
-                    public void buttonClick(ClickEvent event) {
-                        resetState();
-                        // Layout width: 800px
-                        setState(sizeBar, 0, 3);
-                        // layout margin enabled
-                        setState(sizeBar, 3, 1);
-                        // width: 350px to middle child
-                        setChildState(1, 0, 2);
-                        // short caption for middle child
-                        setChildState(1, 2, 1);
-                        // top center align for middle child
-                        setChildState(1, 4, 2);
-                    }
-                }));
+            @Override
+            public void buttonClick(ClickEvent event) {
+                resetState();
+                // Layout width: 800px
+                setState(sizeBar, 0, 3);
+                // layout margin enabled
+                setState(sizeBar, 3, 1);
+                // width: 350px to middle child
+                setChildState(1, 0, 2);
+                // short caption for middle child
+                setChildState(1, 2, 1);
+                // top center align for middle child
+                setChildState(1, 4, 2);
+            }
+        }));
 
         caseBar.addComponent(new Button("Expand with alignment",
                 new ClickListener() {
-                    @Override
-                    public void buttonClick(ClickEvent event) {
-                        resetState();
-                        // Layout width: 800px
-                        setState(sizeBar, 0, 3);
-                        // Layout height: 350px
-                        setState(sizeBar, 1, 2);
-                        // Expand: 1 to middle child
-                        setChildState(1, 3, 1);
-                        // Align bottom left to middle child
-                        setChildState(1, 4, 6);
-                        // Long caption to middle child
-                        setChildState(1, 2, 2);
-                    }
-                }));
+            @Override
+            public void buttonClick(ClickEvent event) {
+                resetState();
+                // Layout width: 800px
+                setState(sizeBar, 0, 3);
+                // Layout height: 350px
+                setState(sizeBar, 1, 2);
+                // Expand: 1 to middle child
+                setChildState(1, 3, 1);
+                // Align bottom left to middle child
+                setChildState(1, 4, 6);
+                // Long caption to middle child
+                setChildState(1, 2, 2);
+            }
+        }));
 
         caseBar.addComponent(new Button("Multiple expands",
                 new ClickListener() {
-                    @Override
-                    public void buttonClick(ClickEvent event) {
-                        resetState();
-                        // Layout width: 800px
-                        setState(sizeBar, 0, 3);
-                        // Layout height: 350px
-                        setState(sizeBar, 1, 2);
-                        // Long caption to left child
-                        setChildState(0, 2, 2);
-                        // Width 350px to middle child
-                        setChildState(1, 0, 2);
-                        // Apply to left and middle child
-                        for (int i = 0; i < 2; i++) {
-                            // Expand: 1
-                            setChildState(i, 3, 1);
-                            // Align: middle center
-                            setChildState(i, 4, 5);
-                        }
-                    }
-                }));
+            @Override
+            public void buttonClick(ClickEvent event) {
+                resetState();
+                // Layout width: 800px
+                setState(sizeBar, 0, 3);
+                // Layout height: 350px
+                setState(sizeBar, 1, 2);
+                // Long caption to left child
+                setChildState(0, 2, 2);
+                // Width 350px to middle child
+                setChildState(1, 0, 2);
+                // Apply to left and middle child
+                for (int i = 0; i < 2; i++) {
+                    // Expand: 1
+                    setChildState(i, 3, 1);
+                    // Align: middle center
+                    setChildState(i, 4, 5);
+                }
+            }
+        }));
 
         caseBar.addComponent(new Button("Fixed + relative height",
                 new ClickListener() {
-                    @Override
-                    public void buttonClick(ClickEvent event) {
-                        resetState();
-                        // Layout height: 100%
-                        setState(sizeBar, 1, 4);
-                        // Height: 350px to left child
-                        setChildState(0, 1, 2);
-                        // Height: 100% to middle child
-                        setChildState(1, 1, 4);
-                        // Short caption to middle child
-                        setChildState(1, 2, 1);
-                        // Alignment: bottom left to right child
-                        setChildState(2, 4, 7);
-                    }
-                }));
+            @Override
+            public void buttonClick(ClickEvent event) {
+                resetState();
+                // Layout height: 100%
+                setState(sizeBar, 1, 4);
+                // Height: 350px to left child
+                setChildState(0, 1, 2);
+                // Height: 100% to middle child
+                setChildState(1, 1, 4);
+                // Short caption to middle child
+                setChildState(1, 2, 1);
+                // Alignment: bottom left to right child
+                setChildState(2, 4, 7);
+            }
+        }));
 
         caseBar.addComponent(new Button("Undefined + relative height",
                 new ClickListener() {
-                    @Override
-                    public void buttonClick(ClickEvent event) {
-                        resetState();
-                        // Height: 350px to left child
-                        setChildState(0, 1, 2);
-                        // Short caption to left child
-                        setChildState(0, 2, 1);
-                        // Height: 100% to middle child
-                        setChildState(1, 1, 4);
-                        // Alignment: bottom left to right child
-                        setChildState(2, 4, 7);
-                    }
-                }));
+            @Override
+            public void buttonClick(ClickEvent event) {
+                resetState();
+                // Height: 350px to left child
+                setChildState(0, 1, 2);
+                // Short caption to left child
+                setChildState(0, 2, 1);
+                // Height: 100% to middle child
+                setChildState(1, 1, 4);
+                // Alignment: bottom left to right child
+                setChildState(2, 4, 7);
+            }
+        }));
 
         caseBar.setSpacing(true);
 
diff --git a/tests/testbench/com/vaadin/tests/components/orderedlayout/VerticalLayoutWidthCalculation.java b/tests/testbench/com/vaadin/tests/components/orderedlayout/VerticalLayoutWidthCalculation.java
index 945ccf0e28..bc76a0c0ce 100644
--- a/tests/testbench/com/vaadin/tests/components/orderedlayout/VerticalLayoutWidthCalculation.java
+++ b/tests/testbench/com/vaadin/tests/components/orderedlayout/VerticalLayoutWidthCalculation.java
@@ -4,7 +4,7 @@ import com.vaadin.tests.components.AbstractTestCase;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.HorizontalLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
 import com.vaadin.ui.Window;
diff --git a/tests/testbench/com/vaadin/tests/components/panel/PanelChangeContents.java b/tests/testbench/com/vaadin/tests/components/panel/PanelChangeContents.java
index f822af0779..a4067c3dcb 100644
--- a/tests/testbench/com/vaadin/tests/components/panel/PanelChangeContents.java
+++ b/tests/testbench/com/vaadin/tests/components/panel/PanelChangeContents.java
@@ -16,7 +16,7 @@
 package com.vaadin.tests.components.panel;
 
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
@@ -25,7 +25,7 @@ import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
 import com.vaadin.ui.VerticalLayout;
 
-public class PanelChangeContents extends AbstractTestRoot implements
+public class PanelChangeContents extends AbstractTestUI implements
         ClickListener {
 
     VerticalLayout stats = new VerticalLayout();
diff --git a/tests/testbench/com/vaadin/tests/components/popupview/ReopenPopupView.java b/tests/testbench/com/vaadin/tests/components/popupview/ReopenPopupView.java
index b450bfe811..99bfc7acfb 100644
--- a/tests/testbench/com/vaadin/tests/components/popupview/ReopenPopupView.java
+++ b/tests/testbench/com/vaadin/tests/components/popupview/ReopenPopupView.java
@@ -16,13 +16,13 @@
 package com.vaadin.tests.components.popupview;
 
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.tests.util.Log;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.PopupView;
 
-public class ReopenPopupView extends AbstractTestRoot {
+public class ReopenPopupView extends AbstractTestUI {
     private final Log log = new Log(5);
 
     @Override
diff --git a/tests/testbench/com/vaadin/tests/components/richtextarea/RichTextAreaWithKeyboardShortcuts.java b/tests/testbench/com/vaadin/tests/components/richtextarea/RichTextAreaWithKeyboardShortcuts.java
index 73d7a95e9f..6eaffa5cf3 100644
--- a/tests/testbench/com/vaadin/tests/components/richtextarea/RichTextAreaWithKeyboardShortcuts.java
+++ b/tests/testbench/com/vaadin/tests/components/richtextarea/RichTextAreaWithKeyboardShortcuts.java
@@ -48,7 +48,7 @@ public class RichTextAreaWithKeyboardShortcuts extends TestBase {
     @Override
     protected void setup() {
 
-        getLayout().getRoot().addActionHandler(actionHandler);
+        getLayout().getUI().addActionHandler(actionHandler);
         getLayout().addComponent(createRichTextArea("InMainLayout"));
 
         Panel panel = new Panel("RTA Panel");
@@ -61,7 +61,7 @@ public class RichTextAreaWithKeyboardShortcuts extends TestBase {
         w.addComponent(createRichTextArea("InSubWindow"));
         w.getContent().setSizeUndefined();
 
-        getLayout().getRoot().addWindow(w);
+        getLayout().getUI().addWindow(w);
 
     }
 
diff --git a/tests/testbench/com/vaadin/tests/components/root/LazyInitRoots.html b/tests/testbench/com/vaadin/tests/components/root/LazyInitRoots.html
deleted file mode 100644
index 5448a24816..0000000000
--- a/tests/testbench/com/vaadin/tests/components/root/LazyInitRoots.html
+++ /dev/null
@@ -1,46 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
-<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
-<head profile="http://selenium-ide.openqa.org/profiles/test-case">
-<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
-<link rel="selenium.base" href="" />
-<title>New Test</title>
-</head>
-<body>
-<table cellpadding="1" cellspacing="1" border="1">
-<thead>
-<tr><td rowspan="1" colspan="3">New Test</td></tr>
-</thead><tbody>
-<tr>
-	<td>open</td>
-	<td>/run/com.vaadin.tests.components.root.LazyInitRoots/normalPath?restartApplication#normalFragment</td>
-	<td></td>
-</tr>
-<tr>
-	<td>assertText</td>
-	<td>vaadin=runcomvaadintestscomponentsrootLazyInitRoots::/VVerticalLayout[0]/ChildComponentContainer[0]/VLabel[0]</td>
-	<td>NormalRoot<br />pathInfo: /normalPath<br />parameters: [restartApplication]<br />uri fragment: normalFragment</td>
-</tr>
-<tr>
-	<td>open</td>
-	<td>/run/com.vaadin.tests.components.root.LazyInitRoots/lazyCreatePath?lazyCreate#lazyCreateFragment</td>
-	<td></td>
-</tr>
-<tr>
-	<td>assertText</td>
-	<td>vaadin=runcomvaadintestscomponentsrootLazyInitRoots::/VVerticalLayout[0]/ChildComponentContainer[0]/VLabel[0]</td>
-	<td>LazyCreateRoot<br />pathInfo: /lazyCreatePath<br />parameters: [lazyCreate]<br />uri fragment: lazyCreateFragment</td>
-</tr>
-<tr>
-	<td>open</td>
-	<td>/run/com.vaadin.tests.components.root.LazyInitRoots/eagerPath/?eagerInit#eagerFragment</td>
-	<td></td>
-</tr>
-<tr>
-	<td>assertText</td>
-	<td>vaadin=runcomvaadintestscomponentsrootLazyInitRoots::/VVerticalLayout[0]/ChildComponentContainer[0]/VLabel[0]</td>
-	<td>EagerInitRoot<br />pathInfo: /eagerPath/<br />parameters: [eagerInit]<br />uri fragment: null</td>
-</tr>
-</tbody></table>
-</body>
-</html>
diff --git a/tests/testbench/com/vaadin/tests/components/root/RootsInMultipleTabs.java b/tests/testbench/com/vaadin/tests/components/root/RootsInMultipleTabs.java
deleted file mode 100644
index ae3182401d..0000000000
--- a/tests/testbench/com/vaadin/tests/components/root/RootsInMultipleTabs.java
+++ /dev/null
@@ -1,45 +0,0 @@
-package com.vaadin.tests.components.root;
-
-import com.vaadin.Application;
-import com.vaadin.RootRequiresMoreInformationException;
-import com.vaadin.terminal.AbstractRootProvider;
-import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestApplication;
-import com.vaadin.ui.Label;
-import com.vaadin.ui.Root;
-
-public class RootsInMultipleTabs extends AbstractTestApplication {
-    private int numberOfRootsOpened;
-
-    public static class TabRoot extends Root {
-        @Override
-        protected void init(WrappedRequest request) {
-            RootsInMultipleTabs application = (RootsInMultipleTabs) getApplication();
-            String message = "This is root number "
-                    + ++application.numberOfRootsOpened;
-
-            addComponent(new Label(message));
-        }
-    }
-
-    public RootsInMultipleTabs() {
-        addRootProvider(new AbstractRootProvider() {
-            @Override
-            public Class<? extends Root> getRootClass(Application application,
-                    WrappedRequest request)
-                    throws RootRequiresMoreInformationException {
-                return TabRoot.class;
-            }
-        });
-    }
-
-    @Override
-    protected String getTestDescription() {
-        return "Opening the same application again (e.g. in a new tab) should create a new Root.";
-    }
-
-    @Override
-    protected Integer getTicketNumber() {
-        return Integer.valueOf(7894);
-    }
-}
diff --git a/tests/testbench/com/vaadin/tests/components/slider/SliderTest.java b/tests/testbench/com/vaadin/tests/components/slider/SliderTest.java
index 9be1fea987..0b9c2d6c5a 100644
--- a/tests/testbench/com/vaadin/tests/components/slider/SliderTest.java
+++ b/tests/testbench/com/vaadin/tests/components/slider/SliderTest.java
@@ -2,6 +2,7 @@ package com.vaadin.tests.components.slider;
 
 import java.util.LinkedHashMap;
 
+import com.vaadin.shared.ui.slider.SliderOrientation;
 import com.vaadin.tests.components.abstractfield.AbstractFieldTest;
 import com.vaadin.ui.Slider;
 
@@ -21,9 +22,9 @@ public class SliderTest extends AbstractFieldTest<Slider> {
         }
     };
 
-    private Command<Slider, Integer> orientationCommand = new Command<Slider, Integer>() {
+    private Command<Slider, SliderOrientation> orientationCommand = new Command<Slider, SliderOrientation>() {
         @Override
-        public void execute(Slider c, Integer value, Object data) {
+        public void execute(Slider c, SliderOrientation value, Object data) {
             c.setOrientation(value);
         }
     };
@@ -56,9 +57,9 @@ public class SliderTest extends AbstractFieldTest<Slider> {
     }
 
     private void createOrientationSelect(String category) {
-        LinkedHashMap<String, Integer> options = new LinkedHashMap<String, Integer>();
-        options.put("Horizontal", Slider.ORIENTATION_HORIZONTAL);
-        options.put("Vertical", Slider.ORIENTATION_VERTICAL);
+        LinkedHashMap<String, SliderOrientation> options = new LinkedHashMap<String, SliderOrientation>();
+        options.put("Horizontal", SliderOrientation.HORIZONTAL);
+        options.put("Vertical", SliderOrientation.VERTICAL);
         createSelectAction("Orientation", category, options, "Horizontal",
                 orientationCommand);
 
diff --git a/tests/testbench/com/vaadin/tests/components/splitpanel/SplitPanelExtraScrollbars.java b/tests/testbench/com/vaadin/tests/components/splitpanel/SplitPanelExtraScrollbars.java
index 00012522ca..5554b2b9f3 100644
--- a/tests/testbench/com/vaadin/tests/components/splitpanel/SplitPanelExtraScrollbars.java
+++ b/tests/testbench/com/vaadin/tests/components/splitpanel/SplitPanelExtraScrollbars.java
@@ -8,7 +8,7 @@ import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.HorizontalSplitPanel;
 import com.vaadin.ui.NativeButton;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class SplitPanelExtraScrollbars extends AbstractTestCase implements
         ClickListener {
diff --git a/tests/testbench/com/vaadin/tests/components/splitpanel/SplitPanelWidthOnResize.java b/tests/testbench/com/vaadin/tests/components/splitpanel/SplitPanelWidthOnResize.java
index e80ad29426..3cdc0c8913 100644
--- a/tests/testbench/com/vaadin/tests/components/splitpanel/SplitPanelWidthOnResize.java
+++ b/tests/testbench/com/vaadin/tests/components/splitpanel/SplitPanelWidthOnResize.java
@@ -5,7 +5,7 @@ import com.vaadin.tests.components.AbstractTestCase;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.HorizontalSplitPanel;
 import com.vaadin.ui.NativeButton;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/components/table/CtrlShiftMultiselect.java b/tests/testbench/com/vaadin/tests/components/table/CtrlShiftMultiselect.java
index 02f4af045b..b9e23930e4 100644
--- a/tests/testbench/com/vaadin/tests/components/table/CtrlShiftMultiselect.java
+++ b/tests/testbench/com/vaadin/tests/components/table/CtrlShiftMultiselect.java
@@ -5,6 +5,7 @@ import com.vaadin.data.Item;
 import com.vaadin.data.util.IndexedContainer;
 import com.vaadin.tests.components.TestBase;
 import com.vaadin.ui.Table;
+import com.vaadin.ui.Table.TableDragMode;
 
 @SuppressWarnings("serial")
 public class CtrlShiftMultiselect extends TestBase {
@@ -18,6 +19,7 @@ public class CtrlShiftMultiselect extends TestBase {
 
         table.setSelectable(true);
         table.setMultiSelect(true);
+        table.setDragMode(TableDragMode.MULTIROW);
 
         table.setWidth("400px");
         table.setHeight("400px");
diff --git a/tests/testbench/com/vaadin/tests/components/table/ScrollCausesRequestLoop.java b/tests/testbench/com/vaadin/tests/components/table/ScrollCausesRequestLoop.java
index 75468af247..edd524d657 100644
--- a/tests/testbench/com/vaadin/tests/components/table/ScrollCausesRequestLoop.java
+++ b/tests/testbench/com/vaadin/tests/components/table/ScrollCausesRequestLoop.java
@@ -7,7 +7,7 @@ import com.vaadin.data.util.BeanItemContainer;
 import com.vaadin.tests.components.AbstractTestCase;
 import com.vaadin.tests.util.Person;
 import com.vaadin.ui.HorizontalLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 
 public class ScrollCausesRequestLoop extends AbstractTestCase {
diff --git a/tests/testbench/com/vaadin/tests/components/table/SelectionRangeDragging.html b/tests/testbench/com/vaadin/tests/components/table/SelectionRangeDragging.html
new file mode 100644
index 0000000000..1e911699d1
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/components/table/SelectionRangeDragging.html
@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head profile="http://selenium-ide.openqa.org/profiles/test-case">
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+<link rel="selenium.base" href="" />
+<title>New Test</title>
+</head>
+<body>
+<table cellpadding="1" cellspacing="1" border="1">
+<thead>
+<tr><td rowspan="1" colspan="3">New Test</td></tr>
+</thead><tbody>
+<tr>
+	<td>open</td>
+	<td>/run/com.vaadin.tests.components.table.CtrlShiftMultiselect?restartApplication</td>
+	<td></td>
+</tr>
+<tr>
+	<td>mouseClick</td>
+	<td>vaadin=runcomvaadintestscomponentstableCtrlShiftMultiselect::/VVerticalLayout[0]/ChildComponentContainer[1]/VVerticalLayout[0]/ChildComponentContainer[0]/VScrollTable[0]/domChild[1]/domChild[0]/domChild[1]/domChild[0]/domChild[5]/domChild[1]/domChild[0]</td>
+	<td>112,12</td>
+</tr>
+<tr>
+	<td>mouseClick</td>
+	<td>vaadin=runcomvaadintestscomponentstableCtrlShiftMultiselect::/VVerticalLayout[0]/ChildComponentContainer[1]/VVerticalLayout[0]/ChildComponentContainer[0]/VScrollTable[0]/domChild[1]/domChild[0]/domChild[1]/domChild[0]/domChild[10]/domChild[1]/domChild[0]</td>
+	<td>82,16:shift</td>
+</tr>
+<tr>
+	<td>drag</td>
+	<td>vaadin=runcomvaadintestscomponentstableCtrlShiftMultiselect::/VVerticalLayout[0]/ChildComponentContainer[1]/VVerticalLayout[0]/ChildComponentContainer[0]/VScrollTable[0]/domChild[1]/domChild[0]/domChild[1]/domChild[0]/domChild[8]/domChild[1]/domChild[0]</td>
+	<td>87,1</td>
+</tr>
+<tr>
+	<td>mouseMoveAt</td>
+	<td>vaadin=runcomvaadintestscomponentstableCtrlShiftMultiselect::/VVerticalLayout[0]/ChildComponentContainer[1]/VVerticalLayout[0]/domChild[0]/domChild[0]</td>
+	<td>700,210</td>
+</tr>
+<tr>
+	<td>screenCapture</td>
+	<td></td>
+	<td>multiple-rows-dragged</td>
+</tr>
+<tr>
+	<td>drop</td>
+	<td>vaadin=runcomvaadintestscomponentstableCtrlShiftMultiselect::/VVerticalLayout[0]/ChildComponentContainer[1]/VVerticalLayout[0]/domChild[0]/domChild[0]</td>
+	<td>700,210</td>
+</tr>
+
+</tbody></table>
+</body>
+</html>
diff --git a/tests/testbench/com/vaadin/tests/components/table/SortLongTable.java b/tests/testbench/com/vaadin/tests/components/table/SortLongTable.java
index 15872aa849..afc63c0eda 100644
--- a/tests/testbench/com/vaadin/tests/components/table/SortLongTable.java
+++ b/tests/testbench/com/vaadin/tests/components/table/SortLongTable.java
@@ -1,7 +1,7 @@
 package com.vaadin.tests.components.table;
 
 import com.vaadin.tests.components.AbstractTestCase;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/components/table/TableExtraScrollbars.java b/tests/testbench/com/vaadin/tests/components/table/TableExtraScrollbars.java
index 010093bf8f..f8fb624c0b 100644
--- a/tests/testbench/com/vaadin/tests/components/table/TableExtraScrollbars.java
+++ b/tests/testbench/com/vaadin/tests/components/table/TableExtraScrollbars.java
@@ -4,7 +4,7 @@ import com.vaadin.data.Container;
 import com.vaadin.data.Item;
 import com.vaadin.data.util.IndexedContainer;
 import com.vaadin.tests.components.AbstractTestCase;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/components/table/TableFirstRowFlicker.java b/tests/testbench/com/vaadin/tests/components/table/TableFirstRowFlicker.java
index 3101615cfd..90df5610eb 100644
--- a/tests/testbench/com/vaadin/tests/components/table/TableFirstRowFlicker.java
+++ b/tests/testbench/com/vaadin/tests/components/table/TableFirstRowFlicker.java
@@ -5,7 +5,7 @@ import com.vaadin.data.Container;
 import com.vaadin.data.util.IndexedContainer;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.ProgressIndicator;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/components/table/TableHeaderZoom.java b/tests/testbench/com/vaadin/tests/components/table/TableHeaderZoom.java
index bce96ebced..26f8e25d3b 100644
--- a/tests/testbench/com/vaadin/tests/components/table/TableHeaderZoom.java
+++ b/tests/testbench/com/vaadin/tests/components/table/TableHeaderZoom.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.components.table;
 
 import com.vaadin.tests.components.TestBase;
 import com.vaadin.ui.CssLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 
 public class TableHeaderZoom extends TestBase {
diff --git a/tests/testbench/com/vaadin/tests/components/table/TableHeightWhenHidingHeaders.java b/tests/testbench/com/vaadin/tests/components/table/TableHeightWhenHidingHeaders.java
index 0173f928dd..6bbf06635a 100644
--- a/tests/testbench/com/vaadin/tests/components/table/TableHeightWhenHidingHeaders.java
+++ b/tests/testbench/com/vaadin/tests/components/table/TableHeightWhenHidingHeaders.java
@@ -4,7 +4,7 @@ import com.vaadin.data.Property.ValueChangeEvent;
 import com.vaadin.data.Property.ValueChangeListener;
 import com.vaadin.tests.components.AbstractTestCase;
 import com.vaadin.ui.CheckBox;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 
 /**
diff --git a/tests/testbench/com/vaadin/tests/components/table/TableInTabsheet.java b/tests/testbench/com/vaadin/tests/components/table/TableInTabsheet.java
index 136dcfe9a5..f54f685a1d 100644
--- a/tests/testbench/com/vaadin/tests/components/table/TableInTabsheet.java
+++ b/tests/testbench/com/vaadin/tests/components/table/TableInTabsheet.java
@@ -4,7 +4,7 @@ import java.net.MalformedURLException;
 
 import com.vaadin.shared.ui.label.ContentMode;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.ui.AbsoluteLayout;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Label;
@@ -14,11 +14,11 @@ import com.vaadin.ui.Table.Align;
 import com.vaadin.ui.VerticalLayout;
 import com.vaadin.ui.themes.Reindeer;
 
-public class TableInTabsheet extends AbstractTestRoot {
+public class TableInTabsheet extends AbstractTestUI {
 
     @Override
     protected void setup(WrappedRequest request) {
-        getRoot().setCaption("test");
+        getUI().setCaption("test");
         VerticalLayout vPrinc = new VerticalLayout();
         vPrinc.setStyleName(Reindeer.LAYOUT_BLUE);
 
diff --git a/tests/testbench/com/vaadin/tests/components/table/TableToggleVisibility.java b/tests/testbench/com/vaadin/tests/components/table/TableToggleVisibility.java
index 0465d2f886..9ca2605cd9 100644
--- a/tests/testbench/com/vaadin/tests/components/table/TableToggleVisibility.java
+++ b/tests/testbench/com/vaadin/tests/components/table/TableToggleVisibility.java
@@ -7,7 +7,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.HorizontalSplitPanel;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/components/table/TestCurrentPageFirstItem.java b/tests/testbench/com/vaadin/tests/components/table/TestCurrentPageFirstItem.java
index d629c9a917..c563312efa 100644
--- a/tests/testbench/com/vaadin/tests/components/table/TestCurrentPageFirstItem.java
+++ b/tests/testbench/com/vaadin/tests/components/table/TestCurrentPageFirstItem.java
@@ -7,7 +7,7 @@ import com.vaadin.tests.components.TestBase;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
diff --git a/tests/testbench/com/vaadin/tests/components/tabsheet/TabsheetNPE.java b/tests/testbench/com/vaadin/tests/components/tabsheet/TabsheetNPE.java
index 8e4c4d40fb..1934649902 100644
--- a/tests/testbench/com/vaadin/tests/components/tabsheet/TabsheetNPE.java
+++ b/tests/testbench/com/vaadin/tests/components/tabsheet/TabsheetNPE.java
@@ -5,7 +5,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TabSheet;
 import com.vaadin.ui.TabSheet.Tab;
 import com.vaadin.ui.VerticalLayout;
diff --git a/tests/testbench/com/vaadin/tests/components/textfield/TextChangeEvents.java b/tests/testbench/com/vaadin/tests/components/textfield/TextChangeEvents.java
index a12a5a8836..b38dd36284 100644
--- a/tests/testbench/com/vaadin/tests/components/textfield/TextChangeEvents.java
+++ b/tests/testbench/com/vaadin/tests/components/textfield/TextChangeEvents.java
@@ -88,7 +88,7 @@ public class TextChangeEvents extends TestBase {
         @Override
         public void attach() {
             super.attach();
-            TestUtils.injectCSS(getRoot(), ".match { background:green ;} "
+            TestUtils.injectCSS(getUI(), ".match { background:green ;} "
                     + ".nomatch {background:red;}");
         }
 
diff --git a/tests/testbench/com/vaadin/tests/components/textfield/TextChangeListenerChangingNonTextProperties.java b/tests/testbench/com/vaadin/tests/components/textfield/TextChangeListenerChangingNonTextProperties.java
index 5b84ff20f2..5991ac6ff7 100644
--- a/tests/testbench/com/vaadin/tests/components/textfield/TextChangeListenerChangingNonTextProperties.java
+++ b/tests/testbench/com/vaadin/tests/components/textfield/TextChangeListenerChangingNonTextProperties.java
@@ -24,7 +24,7 @@ public class TextChangeListenerChangingNonTextProperties extends TestBase {
                 super.attach();
                 TestUtils
                         .injectCSS(
-                                getRoot(),
+                                getUI(),
                                 ".red { background:red;} "
                                         + ".green { background:green;} .blue { background:blue;} .cyan { background:cyan;} .magenta { background:magenta;}");
             }
diff --git a/tests/testbench/com/vaadin/tests/components/textfield/TextFieldInLayoutInTable.java b/tests/testbench/com/vaadin/tests/components/textfield/TextFieldInLayoutInTable.java
index 3e1a709243..903226c87c 100644
--- a/tests/testbench/com/vaadin/tests/components/textfield/TextFieldInLayoutInTable.java
+++ b/tests/testbench/com/vaadin/tests/components/textfield/TextFieldInLayoutInTable.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.components.textfield;
 import com.vaadin.Application;
 import com.vaadin.ui.Component;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
diff --git a/tests/testbench/com/vaadin/tests/components/tree/TreePerformanceTest.java b/tests/testbench/com/vaadin/tests/components/tree/TreePerformanceTest.java
index 9d58762f60..892b7e669a 100644
--- a/tests/testbench/com/vaadin/tests/components/tree/TreePerformanceTest.java
+++ b/tests/testbench/com/vaadin/tests/components/tree/TreePerformanceTest.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.components.tree;
 
 import com.vaadin.tests.components.AbstractTestCase;
 import com.vaadin.ui.Layout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Tree;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/components/tree/TreeScrolling.java b/tests/testbench/com/vaadin/tests/components/tree/TreeScrolling.java
index abc9a5385d..70c2d5d433 100644
--- a/tests/testbench/com/vaadin/tests/components/tree/TreeScrolling.java
+++ b/tests/testbench/com/vaadin/tests/components/tree/TreeScrolling.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.components.tree;
 
 import com.vaadin.tests.components.AbstractTestCase;
 import com.vaadin.ui.RichTextArea;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.Tree;
 import com.vaadin.ui.VerticalLayout;
diff --git a/tests/testbench/com/vaadin/tests/components/treetable/DisappearingComponents.java b/tests/testbench/com/vaadin/tests/components/treetable/DisappearingComponents.java
index 329e5d291d..8f9c1deaf5 100644
--- a/tests/testbench/com/vaadin/tests/components/treetable/DisappearingComponents.java
+++ b/tests/testbench/com/vaadin/tests/components/treetable/DisappearingComponents.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.components.treetable;
 import com.vaadin.terminal.ExternalResource;
 import com.vaadin.tests.components.AbstractTestCase;
 import com.vaadin.ui.Link;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TreeTable;
 
 public class DisappearingComponents extends AbstractTestCase {
diff --git a/tests/testbench/com/vaadin/tests/components/ui/LazyInitUIs.html b/tests/testbench/com/vaadin/tests/components/ui/LazyInitUIs.html
new file mode 100644
index 0000000000..d7e1544026
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/components/ui/LazyInitUIs.html
@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head profile="http://selenium-ide.openqa.org/profiles/test-case">
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+<link rel="selenium.base" href="" />
+<title>New Test</title>
+</head>
+<body>
+<table cellpadding="1" cellspacing="1" border="1">
+<thead>
+<tr><td rowspan="1" colspan="3">New Test</td></tr>
+</thead><tbody>
+<tr>
+	<td>open</td>
+	<td>/run/com.vaadin.tests.components.ui.LazyInitUIs/normalPath?restartApplication#normalFragment</td>
+	<td></td>
+</tr>
+<tr>
+	<td>assertText</td>
+	<td>vaadin=runcomvaadintestscomponentsuilazyInitUIs::/VVerticalLayout[0]/ChildComponentContainer[0]/VLabel[0]</td>
+	<td>NormalUI<br />pathInfo: /normalPath<br />parameters: [restartApplication]<br />uri fragment: normalFragment</td>
+</tr>
+<tr>
+	<td>open</td>
+	<td>/run/com.vaadin.tests.components.ui.LazyInitUIs/lazyCreatePath?lazyCreate#lazyCreateFragment</td>
+	<td></td>
+</tr>
+<tr>
+	<td>assertText</td>
+	<td>vaadin=runcomvaadintestscomponentsuilazyInitUIs::/VVerticalLayout[0]/ChildComponentContainer[0]/VLabel[0]</td>
+	<td>LazyCreateUI<br />pathInfo: /lazyCreatePath<br />parameters: [lazyCreate]<br />uri fragment: lazyCreateFragment</td>
+</tr>
+<tr>
+	<td>open</td>
+	<td>/run/com.vaadin.tests.components.ui.LazyInitUIs/eagerPath/?eagerInit#eagerFragment</td>
+	<td></td>
+</tr>
+<tr>
+	<td>assertText</td>
+	<td>vaadin=runcomvaadintestscomponentsuiLazyInitUIs::/VVerticalLayout[0]/ChildComponentContainer[0]/VLabel[0]</td>
+	<td>EagerInitUI<br />pathInfo: /eagerPath/<br />parameters: [eagerInit]<br />uri fragment: null</td>
+</tr>
+</tbody></table>
+</body>
+</html>
diff --git a/tests/testbench/com/vaadin/tests/components/root/LazyInitRoots.java b/tests/testbench/com/vaadin/tests/components/ui/LazyInitUIs.java
index 254410a549..75a98ba14e 100644
--- a/tests/testbench/com/vaadin/tests/components/root/LazyInitRoots.java
+++ b/tests/testbench/com/vaadin/tests/components/ui/LazyInitUIs.java
@@ -1,6 +1,6 @@
-package com.vaadin.tests.components.root;
+package com.vaadin.tests.components.ui;
 
-import com.vaadin.RootRequiresMoreInformationException;
+import com.vaadin.UIRequiresMoreInformationException;
 import com.vaadin.annotations.EagerInit;
 import com.vaadin.shared.ui.label.ContentMode;
 import com.vaadin.terminal.ExternalResource;
@@ -9,53 +9,53 @@ import com.vaadin.terminal.WrappedRequest.BrowserDetails;
 import com.vaadin.tests.components.AbstractTestApplication;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Link;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
-public class LazyInitRoots extends AbstractTestApplication {
+public class LazyInitUIs extends AbstractTestApplication {
 
     @EagerInit
-    private static class EagerInitRoot extends Root {
+    private static class EagerInitUI extends UI {
         @Override
         public void init(WrappedRequest request) {
-            addComponent(getRequestInfo("EagerInitRoot", request));
+            addComponent(getRequestInfo("EagerInitUI", request));
         }
     }
 
     @Override
-    public Root getRoot(WrappedRequest request)
-            throws RootRequiresMoreInformationException {
+    public UI getUI(WrappedRequest request)
+            throws UIRequiresMoreInformationException {
         if (request.getParameter("lazyCreate") != null) {
-            // Root created on second request
+            // UI created on second request
             BrowserDetails browserDetails = request.getBrowserDetails();
             if (browserDetails == null
                     || browserDetails.getUriFragment() == null) {
-                throw new RootRequiresMoreInformationException();
+                throw new UIRequiresMoreInformationException();
             } else {
-                Root root = new Root() {
+                UI uI = new UI() {
                     @Override
                     protected void init(WrappedRequest request) {
-                        addComponent(getRequestInfo("LazyCreateRoot", request));
+                        addComponent(getRequestInfo("LazyCreateUI", request));
                     }
                 };
-                return root;
+                return uI;
             }
         } else if (request.getParameter("eagerInit") != null) {
-            // Root inited on first request
-            return new EagerInitRoot();
+            // UI inited on first request
+            return new EagerInitUI();
         } else {
-            // The standard root
-            Root root = new Root() {
+            // The standard UI
+            UI uI = new UI() {
                 @Override
                 protected void init(WrappedRequest request) {
-                    addComponent(getRequestInfo("NormalRoot", request));
+                    addComponent(getRequestInfo("NormalUI", request));
 
-                    Link lazyCreateLink = new Link("Open lazyCreate root",
+                    Link lazyCreateLink = new Link("Open lazyCreate UI",
                             new ExternalResource(getURL()
                                     + "?lazyCreate#lazyCreate"));
                     lazyCreateLink.setTargetName("_blank");
                     addComponent(lazyCreateLink);
 
-                    Link lazyInitLink = new Link("Open eagerInit root",
+                    Link lazyInitLink = new Link("Open eagerInit UI",
                             new ExternalResource(getURL()
                                     + "?eagerInit#eagerInit"));
                     lazyInitLink.setTargetName("_blank");
@@ -63,7 +63,7 @@ public class LazyInitRoots extends AbstractTestApplication {
                 }
             };
 
-            return root;
+            return uI;
         }
     }
 
@@ -78,7 +78,7 @@ public class LazyInitRoots extends AbstractTestApplication {
 
     @Override
     protected String getTestDescription() {
-        return "BrowserDetails should be available in Application.getRoot if RootRequiresMoreInformation has been thrown and in Root.init if the root has the @RootInitRequiresBrowserDetals annotation";
+        return "BrowserDetails should be available in Application.getUI if UIRequiresMoreInformation has been thrown and in UI.init if the UI has the @UIInitRequiresBrowserDetals annotation";
     }
 
     @Override
diff --git a/tests/testbench/com/vaadin/tests/components/root/TestRootTheme.html b/tests/testbench/com/vaadin/tests/components/ui/TestUITheme.html
index 7d0f638325..ed2c0ec971 100644
--- a/tests/testbench/com/vaadin/tests/components/root/TestRootTheme.html
+++ b/tests/testbench/com/vaadin/tests/components/ui/TestUITheme.html
@@ -13,7 +13,7 @@
 </thead><tbody>
 <tr>
 	<td>open</td>
-	<td>/run/com.vaadin.tests.components.root.TestRootTheme?restartApplication</td>
+	<td>/run/com.vaadin.tests.components.ui.TestUITheme?restartApplication</td>
 	<td></td>
 </tr>
 <tr>
diff --git a/tests/testbench/com/vaadin/tests/components/root/TestRootTheme.java b/tests/testbench/com/vaadin/tests/components/ui/TestUITheme.java
index 77c0bdb150..39cc598094 100644
--- a/tests/testbench/com/vaadin/tests/components/root/TestRootTheme.java
+++ b/tests/testbench/com/vaadin/tests/components/ui/TestUITheme.java
@@ -1,12 +1,12 @@
-package com.vaadin.tests.components.root;
+package com.vaadin.tests.components.ui;
 
 import com.vaadin.annotations.Theme;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.ui.Label;
 
 @Theme("tests-tickets")
-public class TestRootTheme extends AbstractTestRoot {
+public class TestUITheme extends AbstractTestUI {
 
     @Override
     protected void setup(WrappedRequest request) {
@@ -17,7 +17,7 @@ public class TestRootTheme extends AbstractTestRoot {
 
     @Override
     public String getTestDescription() {
-        return "Root with @RootTheme(\"tests-tickets\")";
+        return "UI with @Theme(\"tests-tickets\")";
     }
 
     @Override
diff --git a/tests/testbench/com/vaadin/tests/components/root/TestRootWidgetset.html b/tests/testbench/com/vaadin/tests/components/ui/TestUIWidgetset.html
index c91d742581..2f0858b4c7 100644
--- a/tests/testbench/com/vaadin/tests/components/root/TestRootWidgetset.html
+++ b/tests/testbench/com/vaadin/tests/components/ui/TestUIWidgetset.html
@@ -13,22 +13,22 @@
 </thead><tbody>
 <tr>
 	<td>open</td>
-	<td>/run/com.vaadin.tests.components.root.TestRootWidgetset</td>
+	<td>/run/com.vaadin.tests.components.ui.TestUIWidgetset</td>
 	<td></td>
 </tr>
 <tr>
 	<td>assertText</td>
-	<td>vaadin=runcomvaadintestscomponentsrootTestRootWidgetset::/VVerticalLayout[0]/VVerticalLayout[0]/VLabel[0]</td>
+	<td>vaadin=runcomvaadintestscomponentsuiTestUIWidgetset::/VVerticalLayout[0]/VVerticalLayout[0]/VLabel[0]</td>
 	<td>This component is available in TestingWidgetset, but not in DefaultWidgetset</td>
 </tr>
 <tr>
 	<td>open</td>
-	<td>/run/com.vaadin.tests.components.root.TestRootWidgetset2</td>
+	<td>/run/com.vaadin.tests.components.ui.TestUIWidgetset2</td>
 	<td></td>
 </tr>
 <tr>
 	<td>assertText</td>
-	<td>vaadin=runcomvaadintestscomponentsrootTestRootWidgetset2::/VVerticalLayout[0]/VVerticalLayout[0]/VUnknownComponent[0]/domChild[0]/domChild[0]/domChild[0]/domChild[0]</td>
+	<td>vaadin=runcomvaadintestscomponentsuiTestUIWidgetset2::/VVerticalLayout[0]/VVerticalLayout[0]/VUnknownComponent[0]/domChild[0]/domChild[0]/domChild[0]/domChild[0]</td>
 	<td>Widgetset does not contain implementation for com.vaadin.tests.widgetset.server.MissingFromDefaultWidgetsetComponent. Check its component connector's @Connect mapping, widgetsets GWT module description file and re-compile your widgetset. In case you have downloaded a vaadin add-on package, you might want to refer to add-on instructions.</td>
 </tr>
 </tbody></table>
diff --git a/tests/testbench/com/vaadin/tests/components/root/TestRootWidgetset.java b/tests/testbench/com/vaadin/tests/components/ui/TestUIWidgetset.java
index b92815eeed..f26e94f243 100644
--- a/tests/testbench/com/vaadin/tests/components/root/TestRootWidgetset.java
+++ b/tests/testbench/com/vaadin/tests/components/ui/TestUIWidgetset.java
@@ -1,12 +1,12 @@
-package com.vaadin.tests.components.root;
+package com.vaadin.tests.components.ui;
 
 import com.vaadin.annotations.Widgetset;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.tests.widgetset.server.MissingFromDefaultWidgetsetComponent;
 
 @Widgetset("com.vaadin.tests.widgetset.TestingWidgetSet")
-public class TestRootWidgetset extends AbstractTestRoot {
+public class TestUIWidgetset extends AbstractTestUI {
 
     @Override
     protected void setup(WrappedRequest request) {
@@ -15,7 +15,7 @@ public class TestRootWidgetset extends AbstractTestRoot {
 
     @Override
     public String getTestDescription() {
-        return "This contents if this root should work as the component is present in TestingWidgetSet";
+        return "This contents if this UI should work as the component is present in TestingWidgetSet";
     }
 
     @Override
diff --git a/tests/testbench/com/vaadin/tests/components/root/TestRootWidgetset2.java b/tests/testbench/com/vaadin/tests/components/ui/TestUIWidgetset2.java
index d3be29215e..84c0780240 100644
--- a/tests/testbench/com/vaadin/tests/components/root/TestRootWidgetset2.java
+++ b/tests/testbench/com/vaadin/tests/components/ui/TestUIWidgetset2.java
@@ -1,10 +1,10 @@
-package com.vaadin.tests.components.root;
+package com.vaadin.tests.components.ui;
 
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.tests.widgetset.server.MissingFromDefaultWidgetsetComponent;
 
-public class TestRootWidgetset2 extends AbstractTestRoot {
+public class TestUIWidgetset2 extends AbstractTestUI {
 
     @Override
     protected void setup(WrappedRequest request) {
@@ -13,7 +13,7 @@ public class TestRootWidgetset2 extends AbstractTestRoot {
 
     @Override
     public String getTestDescription() {
-        return "This contents if this root should not work as the component is not present in DefaultWidgetSet";
+        return "This contents if this UI should not work as the component is not present in DefaultWidgetSet";
     }
 
     @Override
diff --git a/tests/testbench/com/vaadin/tests/components/root/RootInitException.java b/tests/testbench/com/vaadin/tests/components/ui/UIInitException.java
index b4cfa2a28d..29de6f6ac3 100644
--- a/tests/testbench/com/vaadin/tests/components/root/RootInitException.java
+++ b/tests/testbench/com/vaadin/tests/components/ui/UIInitException.java
@@ -1,9 +1,9 @@
-package com.vaadin.tests.components.root;
+package com.vaadin.tests.components.ui;
 
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 
-public class RootInitException extends AbstractTestRoot {
+public class UIInitException extends AbstractTestUI {
 
     @Override
     protected void setup(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/components/root/RootInitTest.java b/tests/testbench/com/vaadin/tests/components/ui/UIInitTest.java
index 16fecc62d2..6efe1d1b28 100644
--- a/tests/testbench/com/vaadin/tests/components/root/RootInitTest.java
+++ b/tests/testbench/com/vaadin/tests/components/ui/UIInitTest.java
@@ -2,22 +2,22 @@
 @ITMillApache2LicenseForJavaFiles@
  */
 
-package com.vaadin.tests.components.root;
+package com.vaadin.tests.components.ui;
 
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.ui.Label;
 
-public class RootInitTest extends AbstractTestRoot {
+public class UIInitTest extends AbstractTestUI {
 
     @Override
     protected void setup(WrappedRequest request) {
-        addComponent(new Label("Hello root"));
+        addComponent(new Label("Hello UI"));
     }
 
     @Override
     public String getTestDescription() {
-        return "Testing basic root creation";
+        return "Testing basic UI creation";
     }
 
     @Override
diff --git a/tests/testbench/com/vaadin/tests/components/root/RootsInMultipleTabs.html b/tests/testbench/com/vaadin/tests/components/ui/UIsInMultipleTabs.html
index c9b83fdc4e..08561588c4 100644
--- a/tests/testbench/com/vaadin/tests/components/root/RootsInMultipleTabs.html
+++ b/tests/testbench/com/vaadin/tests/components/ui/UIsInMultipleTabs.html
@@ -13,33 +13,33 @@
 </thead><tbody>
 <tr>
 	<td>open</td>
-	<td>/run/com.vaadin.tests.components.root.RootsInMultipleTabs?restartApplication</td>
+	<td>/run/com.vaadin.tests.components.ui.UIsInMultipleTabs?restartApplication</td>
 	<td></td>
 </tr>
 <tr>
 	<td>assertText</td>
-	<td>vaadin=runcomvaadintestscomponentsrootRootsInMultipleTabs::/VVerticalLayout[0]/ChildComponentContainer[0]/VLabel[0]</td>
-	<td>This is root number 1</td>
+	<td>vaadin=runcomvaadintestscomponentsuiUIsInMultipleTabs::/VVerticalLayout[0]/ChildComponentContainer[0]/VLabel[0]</td>
+	<td>This is UI number 1</td>
 </tr>
 <tr>
 	<td>open</td>
-	<td>/run/com.vaadin.tests.components.root.RootsInMultipleTabs</td>
+	<td>/run/com.vaadin.tests.components.ui.UIsInMultipleTabs</td>
 	<td></td>
 </tr>
 <tr>
 	<td>assertText</td>
-	<td>vaadin=runcomvaadintestscomponentsrootRootsInMultipleTabs::/VVerticalLayout[0]/ChildComponentContainer[0]/VLabel[0]</td>
-	<td>This is root number 2</td>
+	<td>vaadin=runcomvaadintestscomponentsuiUIsInMultipleTabs::/VVerticalLayout[0]/ChildComponentContainer[0]/VLabel[0]</td>
+	<td>This is UI number 2</td>
 </tr>
 <tr>
 	<td>open</td>
-	<td>/run/com.vaadin.tests.components.root.RootsInMultipleTabs?restartApplication</td>
+	<td>/run/com.vaadin.tests.components.ui.UIsInMultipleTabs?restartApplication</td>
 	<td></td>
 </tr>
 <tr>
 	<td>assertText</td>
-	<td>vaadin=runcomvaadintestscomponentsrootRootsInMultipleTabs::/VVerticalLayout[0]/ChildComponentContainer[0]/VLabel[0]</td>
-	<td>This is root number 1</td>
+	<td>vaadin=runcomvaadintestscomponentsuiUIsInMultipleTabs::/VVerticalLayout[0]/ChildComponentContainer[0]/VLabel[0]</td>
+	<td>This is UI number 1</td>
 </tr>
 
 </tbody></table>
diff --git a/tests/testbench/com/vaadin/tests/components/ui/UIsInMultipleTabs.java b/tests/testbench/com/vaadin/tests/components/ui/UIsInMultipleTabs.java
new file mode 100644
index 0000000000..8dd303a8e1
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/components/ui/UIsInMultipleTabs.java
@@ -0,0 +1,45 @@
+package com.vaadin.tests.components.ui;
+
+import com.vaadin.Application;
+import com.vaadin.UIRequiresMoreInformationException;
+import com.vaadin.terminal.AbstractUIProvider;
+import com.vaadin.terminal.WrappedRequest;
+import com.vaadin.tests.components.AbstractTestApplication;
+import com.vaadin.ui.Label;
+import com.vaadin.ui.UI;
+
+public class UIsInMultipleTabs extends AbstractTestApplication {
+    private int numberOfUIsOpened;
+
+    public static class TabUI extends UI {
+        @Override
+        protected void init(WrappedRequest request) {
+            UIsInMultipleTabs application = (UIsInMultipleTabs) getApplication();
+            String message = "This is UI number "
+                    + ++application.numberOfUIsOpened;
+
+            addComponent(new Label(message));
+        }
+    }
+
+    public UIsInMultipleTabs() {
+        addUIProvider(new AbstractUIProvider() {
+            @Override
+            public Class<? extends UI> getUIClass(Application application,
+                    WrappedRequest request)
+                    throws UIRequiresMoreInformationException {
+                return TabUI.class;
+            }
+        });
+    }
+
+    @Override
+    protected String getTestDescription() {
+        return "Opening the same application again (e.g. in a new tab) should create a new UI.";
+    }
+
+    @Override
+    protected Integer getTicketNumber() {
+        return Integer.valueOf(7894);
+    }
+}
diff --git a/tests/testbench/com/vaadin/tests/components/root/UriFragmentTest.html b/tests/testbench/com/vaadin/tests/components/ui/UriFragmentTest.html
index d4704fea65..bcb9f52afe 100644
--- a/tests/testbench/com/vaadin/tests/components/root/UriFragmentTest.html
+++ b/tests/testbench/com/vaadin/tests/components/ui/UriFragmentTest.html
@@ -13,22 +13,22 @@
 </thead><tbody>
 <tr>
 	<td>open</td>
-	<td>/run/com.vaadin.tests.components.root.UriFragmentTest?restartApplication#urifragment</td>
+	<td>/run/com.vaadin.tests.components.ui.UriFragmentTest?restartApplication#urifragment</td>
 	<td></td>
 </tr>
 <tr>
 	<td>assertText</td>
-	<td>vaadin=runcomvaadintestscomponentsrootUriFragmentTest::/VVerticalLayout[0]/ChildComponentContainer[1]/VVerticalLayout[0]/ChildComponentContainer[0]/VLabel[0]</td>
+	<td>vaadin=runcomvaadintestscomponentsuiUriFragmentTest::/VVerticalLayout[0]/ChildComponentContainer[1]/VVerticalLayout[0]/ChildComponentContainer[0]/VLabel[0]</td>
 	<td>Current URI fragment: urifragment</td>
 </tr>
 <tr>
 	<td>click</td>
-	<td>vaadin=runcomvaadintestscomponentsrootUriFragmentTest::/VVerticalLayout[0]/ChildComponentContainer[1]/VVerticalLayout[0]/ChildComponentContainer[1]/VButton[0]/domChild[0]/domChild[0]</td>
+	<td>vaadin=runcomvaadintestscomponentsuiUriFragmentTest::/VVerticalLayout[0]/ChildComponentContainer[1]/VVerticalLayout[0]/ChildComponentContainer[1]/VButton[0]/domChild[0]/domChild[0]</td>
 	<td></td>
 </tr>
 <tr>
 	<td>assertText</td>
-	<td>vaadin=runcomvaadintestscomponentsrootUriFragmentTest::/VVerticalLayout[0]/ChildComponentContainer[1]/VVerticalLayout[0]/ChildComponentContainer[0]/VLabel[0]</td>
+	<td>vaadin=runcomvaadintestscomponentsuiUriFragmentTest::/VVerticalLayout[0]/ChildComponentContainer[1]/VVerticalLayout[0]/ChildComponentContainer[0]/VLabel[0]</td>
 	<td>Current URI fragment: test</td>
 </tr>
 <tr>
@@ -48,7 +48,7 @@
 </tr>
 <tr>
 	<td>assertText</td>
-	<td>vaadin=runcomvaadintestscomponentsrootUriFragmentTest::/VVerticalLayout[0]/ChildComponentContainer[1]/VVerticalLayout[0]/ChildComponentContainer[0]/VLabel[0]</td>
+	<td>vaadin=runcomvaadintestscomponentsuiUriFragmentTest::/VVerticalLayout[0]/ChildComponentContainer[1]/VVerticalLayout[0]/ChildComponentContainer[0]/VLabel[0]</td>
 	<td>Current URI fragment: urifragment</td>
 </tr>
 <tr>
@@ -68,7 +68,7 @@
 </tr>
 <tr>
 	<td>assertText</td>
-	<td>vaadin=runcomvaadintestscomponentsrootUriFragmentTest::/VVerticalLayout[0]/ChildComponentContainer[1]/VVerticalLayout[0]/ChildComponentContainer[0]/VLabel[0]</td>
+	<td>vaadin=runcomvaadintestscomponentsuiUriFragmentTest::/VVerticalLayout[0]/ChildComponentContainer[1]/VVerticalLayout[0]/ChildComponentContainer[0]/VLabel[0]</td>
 	<td>Current URI fragment: test</td>
 </tr>
 
diff --git a/tests/testbench/com/vaadin/tests/components/root/UriFragmentTest.java b/tests/testbench/com/vaadin/tests/components/ui/UriFragmentTest.java
index d34c7718ce..d2167e67c7 100644
--- a/tests/testbench/com/vaadin/tests/components/root/UriFragmentTest.java
+++ b/tests/testbench/com/vaadin/tests/components/ui/UriFragmentTest.java
@@ -1,14 +1,14 @@
-package com.vaadin.tests.components.root;
+package com.vaadin.tests.components.ui;
 
 import com.vaadin.terminal.Page;
 import com.vaadin.terminal.Page.FragmentChangedEvent;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Label;
 
-public class UriFragmentTest extends AbstractTestRoot {
+public class UriFragmentTest extends AbstractTestUI {
 
     private final Label fragmentLabel = new Label();
 
diff --git a/tests/testbench/com/vaadin/tests/components/window/AttachShouldBeCalledForSubWindows.java b/tests/testbench/com/vaadin/tests/components/window/AttachShouldBeCalledForSubWindows.java
index 52a94daec7..a2f03212b0 100644
--- a/tests/testbench/com/vaadin/tests/components/window/AttachShouldBeCalledForSubWindows.java
+++ b/tests/testbench/com/vaadin/tests/components/window/AttachShouldBeCalledForSubWindows.java
@@ -12,7 +12,7 @@ import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.Component;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 import com.vaadin.ui.Window;
 
 public class AttachShouldBeCalledForSubWindows extends AbstractTestCase
@@ -26,7 +26,7 @@ public class AttachShouldBeCalledForSubWindows extends AbstractTestCase
     @Override
     public void init() {
 
-        Root.LegacyWindow mainWindow = new Root.LegacyWindow() {
+        UI.LegacyWindow mainWindow = new UI.LegacyWindow() {
             @Override
             public void attach() {
                 log(this);
diff --git a/tests/testbench/com/vaadin/tests/components/window/ExecuteJavaScript.java b/tests/testbench/com/vaadin/tests/components/window/ExecuteJavaScript.java
index a9744b2c06..92e0e734ff 100644
--- a/tests/testbench/com/vaadin/tests/components/window/ExecuteJavaScript.java
+++ b/tests/testbench/com/vaadin/tests/components/window/ExecuteJavaScript.java
@@ -4,7 +4,7 @@ import com.vaadin.tests.components.AbstractTestCase;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class ExecuteJavaScript extends AbstractTestCase {
 
diff --git a/tests/testbench/com/vaadin/tests/components/window/ExtraWindowShown.java b/tests/testbench/com/vaadin/tests/components/window/ExtraWindowShown.java
index fc8d7474af..1cdfdef0b5 100644
--- a/tests/testbench/com/vaadin/tests/components/window/ExtraWindowShown.java
+++ b/tests/testbench/com/vaadin/tests/components/window/ExtraWindowShown.java
@@ -29,7 +29,7 @@ public class ExtraWindowShown extends TestBase {
                 iconButton
                         .setIcon(new ThemeResource("../runo/icons/16/ok.png"));
                 w.addComponent(iconButton);
-                event.getButton().getRoot().addWindow(w);
+                event.getButton().getUI().addWindow(w);
             }
 
         });
diff --git a/tests/testbench/com/vaadin/tests/components/window/LazyWindowResize.java b/tests/testbench/com/vaadin/tests/components/window/LazyWindowResize.java
index eb4803630f..80497528ca 100644
--- a/tests/testbench/com/vaadin/tests/components/window/LazyWindowResize.java
+++ b/tests/testbench/com/vaadin/tests/components/window/LazyWindowResize.java
@@ -10,7 +10,7 @@ import com.vaadin.tests.util.Log;
 import com.vaadin.tests.util.LoremIpsum;
 import com.vaadin.ui.CheckBox;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Window;
 import com.vaadin.ui.Window.ResizeEvent;
 import com.vaadin.ui.Window.ResizeListener;
diff --git a/tests/testbench/com/vaadin/tests/components/window/RepaintWindowContents.java b/tests/testbench/com/vaadin/tests/components/window/RepaintWindowContents.java
index 59cd35c2cb..4d2f118ec7 100644
--- a/tests/testbench/com/vaadin/tests/components/window/RepaintWindowContents.java
+++ b/tests/testbench/com/vaadin/tests/components/window/RepaintWindowContents.java
@@ -1,7 +1,7 @@
 package com.vaadin.tests.components.window;
 
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
@@ -9,7 +9,7 @@ import com.vaadin.ui.Layout;
 import com.vaadin.ui.VerticalLayout;
 import com.vaadin.ui.Window;
 
-public class RepaintWindowContents extends AbstractTestRoot {
+public class RepaintWindowContents extends AbstractTestUI {
     private static final long serialVersionUID = 1L;
 
     @SuppressWarnings("serial")
diff --git a/tests/testbench/com/vaadin/tests/components/window/SubWindowFocusAndBlurListeners.java b/tests/testbench/com/vaadin/tests/components/window/SubWindowFocusAndBlurListeners.java
index 061ee7900f..273d48514c 100644
--- a/tests/testbench/com/vaadin/tests/components/window/SubWindowFocusAndBlurListeners.java
+++ b/tests/testbench/com/vaadin/tests/components/window/SubWindowFocusAndBlurListeners.java
@@ -11,7 +11,7 @@ import com.vaadin.tests.components.TestBase;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Notification;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.Window;
 
@@ -64,7 +64,7 @@ public class SubWindowFocusAndBlurListeners extends TestBase {
             }
         });
 
-        Root main = getLayout().getRoot();
+        UI main = getLayout().getUI();
 
         main.addWindow(window);
 
diff --git a/tests/testbench/com/vaadin/tests/components/window/SubWindowOrder.java b/tests/testbench/com/vaadin/tests/components/window/SubWindowOrder.java
index 02241476d5..0ca7fd1067 100644
--- a/tests/testbench/com/vaadin/tests/components/window/SubWindowOrder.java
+++ b/tests/testbench/com/vaadin/tests/components/window/SubWindowOrder.java
@@ -10,7 +10,7 @@ import com.vaadin.ui.ComboBox;
 import com.vaadin.ui.CssLayout;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 import com.vaadin.ui.Window;
 
 public class SubWindowOrder extends TestBase {
@@ -20,7 +20,7 @@ public class SubWindowOrder extends TestBase {
 
     @Override
     protected void setup() {
-        Root mainWindow = getMainWindow();
+        UI mainWindow = getMainWindow();
         HorizontalLayout controlpanels = new HorizontalLayout();
         for (int i = 1; i <= 5; i++) {
             Window dialog = new Window("Dialog " + i);
diff --git a/tests/testbench/com/vaadin/tests/components/window/TooltipInWindow.java b/tests/testbench/com/vaadin/tests/components/window/TooltipInWindow.java
index 56be00b923..a77a1f7703 100644
--- a/tests/testbench/com/vaadin/tests/components/window/TooltipInWindow.java
+++ b/tests/testbench/com/vaadin/tests/components/window/TooltipInWindow.java
@@ -17,11 +17,11 @@
 package com.vaadin.tests.components.window;
 
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.Window;
 
-public class TooltipInWindow extends AbstractTestRoot {
+public class TooltipInWindow extends AbstractTestUI {
 
     @Override
     protected void setup(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/components/window/WindowScrollingComponentIntoView.java b/tests/testbench/com/vaadin/tests/components/window/WindowScrollingComponentIntoView.java
index fdeb21d29c..033de48446 100644
--- a/tests/testbench/com/vaadin/tests/components/window/WindowScrollingComponentIntoView.java
+++ b/tests/testbench/com/vaadin/tests/components/window/WindowScrollingComponentIntoView.java
@@ -8,7 +8,7 @@ import com.vaadin.ui.Component;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
 import com.vaadin.ui.Window;
diff --git a/tests/testbench/com/vaadin/tests/components/window/WindowScrollingUp.java b/tests/testbench/com/vaadin/tests/components/window/WindowScrollingUp.java
index 43f8297a5d..5f55ad8cf3 100644
--- a/tests/testbench/com/vaadin/tests/components/window/WindowScrollingUp.java
+++ b/tests/testbench/com/vaadin/tests/components/window/WindowScrollingUp.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.components.window;
 import com.vaadin.tests.components.AbstractTestCase;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 
 public class WindowScrollingUp extends AbstractTestCase {
@@ -28,7 +28,7 @@ public class WindowScrollingUp extends AbstractTestCase {
 
             @Override
             public void buttonClick(ClickEvent event) {
-                up.getRoot().setScrollTop(0);
+                up.getUI().setScrollTop(0);
             }
         });
 
diff --git a/tests/testbench/com/vaadin/tests/containers/sqlcontainer/CheckboxUpdateProblem.java b/tests/testbench/com/vaadin/tests/containers/sqlcontainer/CheckboxUpdateProblem.java
index 537c9be973..0c1fdc23f6 100644
--- a/tests/testbench/com/vaadin/tests/containers/sqlcontainer/CheckboxUpdateProblem.java
+++ b/tests/testbench/com/vaadin/tests/containers/sqlcontainer/CheckboxUpdateProblem.java
@@ -12,7 +12,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Form;
 import com.vaadin.ui.HorizontalSplitPanel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 
 public class CheckboxUpdateProblem extends Application.LegacyApplication
diff --git a/tests/testbench/com/vaadin/tests/containers/sqlcontainer/ComboBoxUpdateProblem.java b/tests/testbench/com/vaadin/tests/containers/sqlcontainer/ComboBoxUpdateProblem.java
index b7d1b8c37e..aec0f0e28e 100644
--- a/tests/testbench/com/vaadin/tests/containers/sqlcontainer/ComboBoxUpdateProblem.java
+++ b/tests/testbench/com/vaadin/tests/containers/sqlcontainer/ComboBoxUpdateProblem.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.containers.sqlcontainer;
 import com.vaadin.Application;
 import com.vaadin.ui.AbstractSelect.Filtering;
 import com.vaadin.ui.ComboBox;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
 /**
  * See http://dev.vaadin.com/ticket/9155 .
@@ -13,7 +13,7 @@ public class ComboBoxUpdateProblem extends Application.LegacyApplication {
 
     @Override
     public void init() {
-        setMainWindow(new Root.LegacyWindow("Test window"));
+        setMainWindow(new UI.LegacyWindow("Test window"));
 
         ComboBox combo = new ComboBox("Names",
                 databaseHelper.getTestContainer());
diff --git a/tests/testbench/com/vaadin/tests/containers/sqlcontainer/MassInsertMemoryLeakTestApp.java b/tests/testbench/com/vaadin/tests/containers/sqlcontainer/MassInsertMemoryLeakTestApp.java
index dc919fdb12..8bb2ba1092 100644
--- a/tests/testbench/com/vaadin/tests/containers/sqlcontainer/MassInsertMemoryLeakTestApp.java
+++ b/tests/testbench/com/vaadin/tests/containers/sqlcontainer/MassInsertMemoryLeakTestApp.java
@@ -12,7 +12,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.ComponentContainer;
 import com.vaadin.ui.ProgressIndicator;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 // author table in testdb (MySQL) is set out as follows
diff --git a/tests/testbench/com/vaadin/tests/dd/DDTest2.java b/tests/testbench/com/vaadin/tests/dd/DDTest2.java
index 272be53034..4d649c6056 100644
--- a/tests/testbench/com/vaadin/tests/dd/DDTest2.java
+++ b/tests/testbench/com/vaadin/tests/dd/DDTest2.java
@@ -24,7 +24,7 @@ import com.vaadin.ui.AbstractSelect;
 import com.vaadin.ui.AbstractSelect.AbstractSelectTargetDetails;
 import com.vaadin.ui.AbstractSelect.AcceptItem;
 import com.vaadin.ui.HorizontalLayout;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.Table.TableTransferable;
 import com.vaadin.ui.Tree;
@@ -45,7 +45,7 @@ public class DDTest2 extends TestBase {
 
     @Override
     protected void setup() {
-        Root w = getLayout().getRoot();
+        UI w = getLayout().getUI();
         /* darn reindeer has no icons */
 
         /* Make all trees (their nodes actually) draggable */
diff --git a/tests/testbench/com/vaadin/tests/dd/DDTest4.java b/tests/testbench/com/vaadin/tests/dd/DDTest4.java
index c7f0c6960b..044fe1f49a 100644
--- a/tests/testbench/com/vaadin/tests/dd/DDTest4.java
+++ b/tests/testbench/com/vaadin/tests/dd/DDTest4.java
@@ -16,7 +16,7 @@ import com.vaadin.tests.util.PersonContainer;
 import com.vaadin.tests.util.TestUtils;
 import com.vaadin.ui.AbstractSelect.AbstractSelectTargetDetails;
 import com.vaadin.ui.HorizontalLayout;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 import com.vaadin.ui.Table;
 
 public class DDTest4 extends TestBase {
@@ -28,7 +28,7 @@ public class DDTest4 extends TestBase {
 
     @Override
     protected void setup() {
-        Root w = getLayout().getRoot();
+        UI w = getLayout().getUI();
 
         TestUtils
                 .injectCSS(
diff --git a/tests/testbench/com/vaadin/tests/dd/DDTest5.java b/tests/testbench/com/vaadin/tests/dd/DDTest5.java
index 63d1e9e3c2..43342fdc35 100644
--- a/tests/testbench/com/vaadin/tests/dd/DDTest5.java
+++ b/tests/testbench/com/vaadin/tests/dd/DDTest5.java
@@ -15,7 +15,7 @@ import com.vaadin.ui.DragAndDropWrapper.DragStartMode;
 import com.vaadin.ui.DragAndDropWrapper.WrapperTransferable;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
 public class DDTest5 extends TestBase {
 
@@ -47,7 +47,7 @@ public class DDTest5 extends TestBase {
 
     @Override
     protected void setup() {
-        Root w = getLayout().getRoot();
+        UI w = getLayout().getUI();
 
         HorizontalSortableCssLayoutWithWrappers verticalSortableCssLayoutWithWrappers = new HorizontalSortableCssLayoutWithWrappers();
         w.addWindow(verticalSortableCssLayoutWithWrappers);
diff --git a/tests/testbench/com/vaadin/tests/dd/DDTest6.java b/tests/testbench/com/vaadin/tests/dd/DDTest6.java
index c6ac0b1859..f1e31c1452 100644
--- a/tests/testbench/com/vaadin/tests/dd/DDTest6.java
+++ b/tests/testbench/com/vaadin/tests/dd/DDTest6.java
@@ -164,7 +164,7 @@ public class DDTest6 extends TestBase {
         getLayout().addComponent(sp);
         TestUtils
                 .injectCSS(
-                        getLayout().getRoot(),
+                        getLayout().getUI(),
                         ""
                                 + ".v-tree .v-icon {height:16px;} "
                                 + ".v-tree-node-caption-drag-top {/*border-top: none;*/} "
diff --git a/tests/testbench/com/vaadin/tests/dd/DDTest7.java b/tests/testbench/com/vaadin/tests/dd/DDTest7.java
index f9be935b23..1abf9e379c 100644
--- a/tests/testbench/com/vaadin/tests/dd/DDTest7.java
+++ b/tests/testbench/com/vaadin/tests/dd/DDTest7.java
@@ -16,7 +16,7 @@ import com.vaadin.tests.util.PersonContainer;
 import com.vaadin.tests.util.TestUtils;
 import com.vaadin.ui.AbstractSelect.AbstractSelectTargetDetails;
 import com.vaadin.ui.HorizontalLayout;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 import com.vaadin.ui.Table;
 
 public class DDTest7 extends TestBase {
@@ -29,7 +29,7 @@ public class DDTest7 extends TestBase {
 
     @Override
     protected void setup() {
-        Root w = getLayout().getRoot();
+        UI w = getLayout().getUI();
 
         TestUtils
                 .injectCSS(
diff --git a/tests/testbench/com/vaadin/tests/extensions/BasicExtensionTest.java b/tests/testbench/com/vaadin/tests/extensions/BasicExtensionTest.java
index e774ee0286..daa2e78353 100644
--- a/tests/testbench/com/vaadin/tests/extensions/BasicExtensionTest.java
+++ b/tests/testbench/com/vaadin/tests/extensions/BasicExtensionTest.java
@@ -18,14 +18,14 @@ package com.vaadin.tests.extensions;
 
 import com.vaadin.annotations.Widgetset;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.Label;
 
 @Widgetset("com.vaadin.tests.widgetset.TestingWidgetSet")
-public class BasicExtensionTest extends AbstractTestRoot {
+public class BasicExtensionTest extends AbstractTestUI {
 
     @Override
     protected void setup(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/extensions/HelloWorldExtensionTest.java b/tests/testbench/com/vaadin/tests/extensions/HelloWorldExtensionTest.java
index b389b77e97..e4646572db 100644
--- a/tests/testbench/com/vaadin/tests/extensions/HelloWorldExtensionTest.java
+++ b/tests/testbench/com/vaadin/tests/extensions/HelloWorldExtensionTest.java
@@ -17,12 +17,12 @@ package com.vaadin.tests.extensions;
 
 import com.vaadin.annotations.Widgetset;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 
 @Widgetset("com.vaadin.tests.widgetset.TestingWidgetSet")
-public class HelloWorldExtensionTest extends AbstractTestRoot {
+public class HelloWorldExtensionTest extends AbstractTestUI {
 
     @Override
     protected void setup(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/extensions/JavascriptManagerTest.java b/tests/testbench/com/vaadin/tests/extensions/JavascriptManagerTest.java
index 9d09436e45..6281f3eff4 100644
--- a/tests/testbench/com/vaadin/tests/extensions/JavascriptManagerTest.java
+++ b/tests/testbench/com/vaadin/tests/extensions/JavascriptManagerTest.java
@@ -20,12 +20,12 @@ import com.vaadin.external.json.JSONArray;
 import com.vaadin.external.json.JSONException;
 import com.vaadin.external.json.JSONObject;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.tests.util.Log;
 import com.vaadin.ui.JavaScript;
 import com.vaadin.ui.JavaScriptFunction;
 
-public class JavascriptManagerTest extends AbstractTestRoot {
+public class JavascriptManagerTest extends AbstractTestUI {
 
     private Log log = new Log(5);
 
diff --git a/tests/testbench/com/vaadin/tests/extensions/SimpleJavaScriptExtensionTest.java b/tests/testbench/com/vaadin/tests/extensions/SimpleJavaScriptExtensionTest.java
index 7d4f41cfb3..c604516b9c 100644
--- a/tests/testbench/com/vaadin/tests/extensions/SimpleJavaScriptExtensionTest.java
+++ b/tests/testbench/com/vaadin/tests/extensions/SimpleJavaScriptExtensionTest.java
@@ -25,13 +25,13 @@ import com.vaadin.shared.communication.ClientRpc;
 import com.vaadin.shared.communication.ServerRpc;
 import com.vaadin.terminal.AbstractJavaScriptExtension;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.JavaScriptFunction;
 import com.vaadin.ui.Notification;
 
-public class SimpleJavaScriptExtensionTest extends AbstractTestRoot {
+public class SimpleJavaScriptExtensionTest extends AbstractTestUI {
 
     public static class SimpleJavaScriptExtensionState extends
             JavaScriptExtensionState {
diff --git a/tests/testbench/com/vaadin/tests/integration/EmbedSizeTest.java b/tests/testbench/com/vaadin/tests/integration/EmbedSizeTest.java
index f1345bca13..6a9f696e75 100644
--- a/tests/testbench/com/vaadin/tests/integration/EmbedSizeTest.java
+++ b/tests/testbench/com/vaadin/tests/integration/EmbedSizeTest.java
@@ -7,7 +7,7 @@ import com.vaadin.terminal.Page.BrowserWindowResizeEvent;
 import com.vaadin.tests.components.TestBase;
 import com.vaadin.tests.util.Log;
 import com.vaadin.ui.CheckBox;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class EmbedSizeTest extends TestBase {
 
diff --git a/tests/testbench/com/vaadin/tests/integration/IntegrationTestApplication.java b/tests/testbench/com/vaadin/tests/integration/IntegrationTestApplication.java
index c464409153..b3fc9c8ffb 100644
--- a/tests/testbench/com/vaadin/tests/integration/IntegrationTestApplication.java
+++ b/tests/testbench/com/vaadin/tests/integration/IntegrationTestApplication.java
@@ -7,7 +7,7 @@ import com.vaadin.data.Property.ValueChangeListener;
 import com.vaadin.terminal.ClassResource;
 import com.vaadin.terminal.Resource;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 
 public class IntegrationTestApplication extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/integration/JSR286PortletApplication.java b/tests/testbench/com/vaadin/tests/integration/JSR286PortletApplication.java
index 3374342947..c2a01b16dd 100644
--- a/tests/testbench/com/vaadin/tests/integration/JSR286PortletApplication.java
+++ b/tests/testbench/com/vaadin/tests/integration/JSR286PortletApplication.java
@@ -28,8 +28,8 @@ import com.vaadin.ui.Embedded;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Link;
 import com.vaadin.ui.Notification;
-import com.vaadin.ui.Root;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.Upload;
 import com.vaadin.ui.Upload.Receiver;
@@ -101,13 +101,13 @@ public class JSR286PortletApplication extends Application.LegacyApplication {
 
         @Override
         public void handleActionRequest(ActionRequest request,
-                ActionResponse response, Root window) {
+                ActionResponse response, UI window) {
             main.addComponent(new Label("Action received"));
         }
 
         @Override
         public void handleRenderRequest(RenderRequest request,
-                RenderResponse response, Root window) {
+                RenderResponse response, UI window) {
             // Portlet up-and-running, enable stuff
             portletEdit.setEnabled(true);
             portletMax.setEnabled(true);
@@ -181,13 +181,13 @@ public class JSR286PortletApplication extends Application.LegacyApplication {
 
         @Override
         public void handleEventRequest(EventRequest request,
-                EventResponse response, Root window) {
+                EventResponse response, UI window) {
             // events not used by this test
         }
 
         @Override
         public void handleResourceRequest(ResourceRequest request,
-                ResourceResponse response, Root window) {
+                ResourceResponse response, UI window) {
             // nothing special to do here
         }
     }
diff --git a/tests/testbench/com/vaadin/tests/integration/LiferayThemeDemo.java b/tests/testbench/com/vaadin/tests/integration/LiferayThemeDemo.java
index a35b78c219..a233191070 100644
--- a/tests/testbench/com/vaadin/tests/integration/LiferayThemeDemo.java
+++ b/tests/testbench/com/vaadin/tests/integration/LiferayThemeDemo.java
@@ -10,6 +10,7 @@ import com.vaadin.data.Property.ValueChangeEvent;
 import com.vaadin.event.Action;
 import com.vaadin.shared.ui.MarginInfo;
 import com.vaadin.shared.ui.label.ContentMode;
+import com.vaadin.shared.ui.slider.SliderOrientation;
 import com.vaadin.terminal.ExternalResource;
 import com.vaadin.terminal.Page;
 import com.vaadin.terminal.Resource;
@@ -39,7 +40,6 @@ import com.vaadin.ui.NativeSelect;
 import com.vaadin.ui.Notification;
 import com.vaadin.ui.Panel;
 import com.vaadin.ui.PopupView;
-import com.vaadin.ui.Root.LegacyWindow;
 import com.vaadin.ui.Slider;
 import com.vaadin.ui.Slider.ValueOutOfBoundsException;
 import com.vaadin.ui.TabSheet;
@@ -50,6 +50,7 @@ import com.vaadin.ui.TextArea;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.Tree;
 import com.vaadin.ui.TwinColSelect;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 import com.vaadin.ui.VerticalSplitPanel;
 import com.vaadin.ui.Window;
@@ -534,7 +535,7 @@ public class LiferayThemeDemo extends Application.LegacyApplication {
 
         l.addComponent(new Label("Vertical Slider", ContentMode.XHTML));
         s = new Slider();
-        s.setOrientation(Slider.ORIENTATION_VERTICAL);
+        s.setOrientation(SliderOrientation.VERTICAL);
         s.setHeight("200px");
         try {
             s.setValue(50);
diff --git a/tests/testbench/com/vaadin/tests/integration/PortletSizeInLiferayFreeformLayoutApplication.java b/tests/testbench/com/vaadin/tests/integration/PortletSizeInLiferayFreeformLayoutApplication.java
index 20967203bc..fc54547890 100644
--- a/tests/testbench/com/vaadin/tests/integration/PortletSizeInLiferayFreeformLayoutApplication.java
+++ b/tests/testbench/com/vaadin/tests/integration/PortletSizeInLiferayFreeformLayoutApplication.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.integration;
 
 import com.vaadin.Application.LegacyApplication;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 /**
diff --git a/tests/testbench/com/vaadin/tests/layouts/ComplexGLColumnExpansionWithColSpan.java b/tests/testbench/com/vaadin/tests/layouts/ComplexGLColumnExpansionWithColSpan.java
index 51f9e2d88e..7877ca3fe3 100644
--- a/tests/testbench/com/vaadin/tests/layouts/ComplexGLColumnExpansionWithColSpan.java
+++ b/tests/testbench/com/vaadin/tests/layouts/ComplexGLColumnExpansionWithColSpan.java
@@ -4,7 +4,7 @@ import com.vaadin.terminal.Sizeable;
 import com.vaadin.tests.components.AbstractTestCase;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.GridLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
 
@@ -73,7 +73,7 @@ public class ComplexGLColumnExpansionWithColSpan extends AbstractTestCase {
         restart.addListener(new Button.ClickListener() {
             @Override
             public void buttonClick(Button.ClickEvent event) {
-                mainLayout.getRoot().getApplication().close();
+                mainLayout.getUI().getApplication().close();
             }
         });
 
diff --git a/tests/testbench/com/vaadin/tests/layouts/GridLayoutCaptions.java b/tests/testbench/com/vaadin/tests/layouts/GridLayoutCaptions.java
index 8713208dc6..2d5bc8d59a 100644
--- a/tests/testbench/com/vaadin/tests/layouts/GridLayoutCaptions.java
+++ b/tests/testbench/com/vaadin/tests/layouts/GridLayoutCaptions.java
@@ -15,7 +15,7 @@ import com.vaadin.ui.Form;
 import com.vaadin.ui.FormFieldFactory;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/layouts/GridLayoutExpandRatioModification.java b/tests/testbench/com/vaadin/tests/layouts/GridLayoutExpandRatioModification.java
index 84f27e5f03..acc5f07103 100644
--- a/tests/testbench/com/vaadin/tests/layouts/GridLayoutExpandRatioModification.java
+++ b/tests/testbench/com/vaadin/tests/layouts/GridLayoutExpandRatioModification.java
@@ -6,7 +6,7 @@ import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/layouts/GridLayoutInsidePanel2.java b/tests/testbench/com/vaadin/tests/layouts/GridLayoutInsidePanel2.java
index d6ea84e44e..6273b92838 100644
--- a/tests/testbench/com/vaadin/tests/layouts/GridLayoutInsidePanel2.java
+++ b/tests/testbench/com/vaadin/tests/layouts/GridLayoutInsidePanel2.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Layout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class GridLayoutInsidePanel2 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/layouts/MovingComponentsWhileOldParentInvisible.java b/tests/testbench/com/vaadin/tests/layouts/MovingComponentsWhileOldParentInvisible.java
index 5f91786571..0621fd5d92 100644
--- a/tests/testbench/com/vaadin/tests/layouts/MovingComponentsWhileOldParentInvisible.java
+++ b/tests/testbench/com/vaadin/tests/layouts/MovingComponentsWhileOldParentInvisible.java
@@ -14,7 +14,7 @@ import com.vaadin.ui.CustomLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.LoginForm;
 import com.vaadin.ui.PopupView;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 import com.vaadin.ui.Window;
 
 public class MovingComponentsWhileOldParentInvisible extends TestBase {
@@ -45,7 +45,7 @@ public class MovingComponentsWhileOldParentInvisible extends TestBase {
             if (cls == LoginForm.class || cls == CustomLayout.class
                     || CustomComponent.class.isAssignableFrom(cls)
                     || cls == PopupView.class || cls == Window.class
-                    || cls == Root.class) {
+                    || cls == UI.class) {
                 // Does not support addComponent
                 continue;
             }
diff --git a/tests/testbench/com/vaadin/tests/layouts/TestLayoutClickListeners.java b/tests/testbench/com/vaadin/tests/layouts/TestLayoutClickListeners.java
index b998abeb02..44f40a7d78 100644
--- a/tests/testbench/com/vaadin/tests/layouts/TestLayoutClickListeners.java
+++ b/tests/testbench/com/vaadin/tests/layouts/TestLayoutClickListeners.java
@@ -13,7 +13,7 @@ import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Layout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextArea;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
diff --git a/tests/testbench/com/vaadin/tests/layouts/TreeWithBordersInLayout.java b/tests/testbench/com/vaadin/tests/layouts/TreeWithBordersInLayout.java
index 8d506e0884..8786ae282c 100644
--- a/tests/testbench/com/vaadin/tests/layouts/TreeWithBordersInLayout.java
+++ b/tests/testbench/com/vaadin/tests/layouts/TreeWithBordersInLayout.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.layouts;
 
 import com.vaadin.tests.components.AbstractTestCase;
 import com.vaadin.ui.Layout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Tree;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/layouts/VerticalLayoutExpandRatioModification.java b/tests/testbench/com/vaadin/tests/layouts/VerticalLayoutExpandRatioModification.java
index 916a82bb85..ef24150762 100644
--- a/tests/testbench/com/vaadin/tests/layouts/VerticalLayoutExpandRatioModification.java
+++ b/tests/testbench/com/vaadin/tests/layouts/VerticalLayoutExpandRatioModification.java
@@ -5,7 +5,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/layouts/layouttester/LayoutTesterApplication.java b/tests/testbench/com/vaadin/tests/layouts/layouttester/LayoutTesterApplication.java
index 90193be7cc..e31ecc2498 100644
--- a/tests/testbench/com/vaadin/tests/layouts/layouttester/LayoutTesterApplication.java
+++ b/tests/testbench/com/vaadin/tests/layouts/layouttester/LayoutTesterApplication.java
@@ -11,7 +11,7 @@ import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Layout;
 import com.vaadin.ui.NativeSelect;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 import com.vaadin.ui.themes.Reindeer;
 
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/AutoGeneratingForm.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/AutoGeneratingForm.java
index 00d336de92..08556e99d0 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/AutoGeneratingForm.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/AutoGeneratingForm.java
@@ -20,7 +20,7 @@ import com.vaadin.data.fieldgroup.BeanFieldGroup;
 import com.vaadin.data.fieldgroup.FieldGroup;
 import com.vaadin.data.util.BeanItem;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
 /**
  * Mini tutorial code for
@@ -30,7 +30,7 @@ import com.vaadin.ui.Root;
  * @author Vaadin Ltd
  * @since 7.0.0
  */
-public class AutoGeneratingForm extends Root {
+public class AutoGeneratingForm extends UI {
 
     @Override
     protected void init(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/BasicApplication.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/BasicApplication.java
index 43e404b461..f3e6653288 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/BasicApplication.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/BasicApplication.java
@@ -18,7 +18,7 @@ package com.vaadin.tests.minitutorials.v7a1;
 
 import com.vaadin.terminal.WrappedRequest;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 import com.vaadin.ui.VerticalLayout;
 
 /**
@@ -28,7 +28,7 @@ import com.vaadin.ui.VerticalLayout;
  * @author Vaadin Ltd
  * @since 7.0.0
  */
-public class BasicApplication extends Root {
+public class BasicApplication extends UI {
 
     @Override
     protected void init(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/CreatingPreserveState.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/CreatingPreserveState.java
index 0a04aead7f..39b11177b6 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/CreatingPreserveState.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/CreatingPreserveState.java
@@ -17,7 +17,7 @@
 package com.vaadin.tests.minitutorials.v7a1;
 
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 import com.vaadin.ui.TextField;
 
 /**
@@ -28,7 +28,7 @@ import com.vaadin.ui.TextField;
  * @author Vaadin Ltd
  * @since 7.0.0
  */
-public class CreatingPreserveState extends Root {
+public class CreatingPreserveState extends UI {
     private static int windowCounter = 0;
 
     @Override
@@ -36,7 +36,7 @@ public class CreatingPreserveState extends Root {
         TextField tf = new TextField("Window #" + (++windowCounter));
         tf.setImmediate(true);
         getContent().addComponent(tf);
-        getApplication().setRootPreserved(true);
+        getApplication().setUiPreserved(true);
     }
 
 }
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/CustomConverterFactoryRoot.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/CustomConverterFactoryUI.java
index 89b4a0f8db..eb34747450 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/CustomConverterFactoryRoot.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/CustomConverterFactoryUI.java
@@ -1,10 +1,10 @@
 package com.vaadin.tests.minitutorials.v7a1;
 
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.ui.TextField;
 
-public class CustomConverterFactoryRoot extends AbstractTestRoot {
+public class CustomConverterFactoryUI extends AbstractTestUI {
     @Override
     public void setup(WrappedRequest request) {
         getApplication().setConverterFactory(new MyConverterFactory());
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/DefineRootTheme.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/DefineUITheme.java
index 5296f03c30..12938f9f12 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/DefineRootTheme.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/DefineUITheme.java
@@ -19,7 +19,7 @@ package com.vaadin.tests.minitutorials.v7a1;
 import com.vaadin.annotations.Theme;
 import com.vaadin.terminal.WrappedRequest;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 import com.vaadin.ui.VerticalLayout;
 
 /**
@@ -30,7 +30,7 @@ import com.vaadin.ui.VerticalLayout;
  * @since 7.0.0
  */
 @Theme("hello-theme")
-public class DefineRootTheme extends Root {
+public class DefineUITheme extends UI {
 
     @Override
     protected void init(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/DifferentFeaturesForDifferentClients.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/DifferentFeaturesForDifferentClients.java
index 616fea7ff2..b0a33c14cf 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/DifferentFeaturesForDifferentClients.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/DifferentFeaturesForDifferentClients.java
@@ -17,12 +17,12 @@
 package com.vaadin.tests.minitutorials.v7a1;
 
 import com.vaadin.Application;
-import com.vaadin.RootRequiresMoreInformationException;
+import com.vaadin.UIRequiresMoreInformationException;
 import com.vaadin.terminal.WrappedRequest;
 import com.vaadin.terminal.WrappedRequest.BrowserDetails;
 import com.vaadin.terminal.gwt.server.WebBrowser;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
 /**
  * Mini tutorial code for
@@ -35,13 +35,13 @@ import com.vaadin.ui.Root;
 public class DifferentFeaturesForDifferentClients extends Application {
 
     @Override
-    protected Root getRoot(WrappedRequest request)
-            throws RootRequiresMoreInformationException {
+    protected UI getUI(WrappedRequest request)
+            throws UIRequiresMoreInformationException {
         BrowserDetails browserDetails = request.getBrowserDetails();
         // This is a limitation of 7.0.0.alpha1 that there is no better way to
         // check if WebBrowser has been fully initialized
         if (browserDetails.getUriFragment() == null) {
-            throw new RootRequiresMoreInformationException();
+            throw new UIRequiresMoreInformationException();
         }
 
         // could also use screen size, browser version etc.
@@ -53,7 +53,7 @@ public class DifferentFeaturesForDifferentClients extends Application {
     }
 }
 
-class DefaultRoot extends Root {
+class DefaultRoot extends UI {
     @Override
     protected void init(WrappedRequest request) {
         getContent().addComponent(
@@ -61,7 +61,7 @@ class DefaultRoot extends Root {
     }
 }
 
-class TouchRoot extends Root {
+class TouchRoot extends UI {
     @Override
     protected void init(WrappedRequest request) {
         WebBrowser webBrowser = request.getBrowserDetails().getWebBrowser();
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/DynamicImageRoot.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/DynamicImageUI.java
index 81f225bc63..f3e96aaafc 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/DynamicImageRoot.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/DynamicImageUI.java
@@ -12,10 +12,10 @@ import com.vaadin.terminal.ExternalResource;
 import com.vaadin.terminal.RequestHandler;
 import com.vaadin.terminal.WrappedRequest;
 import com.vaadin.terminal.WrappedResponse;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.ui.Embedded;
 
-public class DynamicImageRoot extends AbstractTestRoot {
+public class DynamicImageUI extends AbstractTestUI {
 
     @Override
     public void setup(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/FindCurrentRootAndApplication.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/FindCurrentUI.java
index d53ede3518..9830ee6aeb 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/FindCurrentRootAndApplication.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/FindCurrentUI.java
@@ -22,7 +22,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.Notification;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
 /**
  * Mini tutorial code for
@@ -32,7 +32,7 @@ import com.vaadin.ui.Root;
  * @author Vaadin Ltd
  * @since 7.0.0
  */
-public class FindCurrentRootAndApplication extends Root {
+public class FindCurrentUI extends UI {
 
     @Override
     protected void init(WrappedRequest request) {
@@ -50,8 +50,8 @@ public class FindCurrentRootAndApplication extends Root {
         helloButton.addListener(new ClickListener() {
             @Override
             public void buttonClick(ClickEvent event) {
-                Notification.show("This Root is "
-                        + Root.getCurrent().getClass().getSimpleName());
+                Notification.show("This UI is "
+                        + UI.getCurrent().getClass().getSimpleName());
             }
         });
 
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/FormUsingExistingLayout.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/FormUsingExistingLayout.java
index 1e460b2f6e..2a8b228bc3 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/FormUsingExistingLayout.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/FormUsingExistingLayout.java
@@ -4,12 +4,12 @@ import com.vaadin.data.fieldgroup.FieldGroup;
 import com.vaadin.data.fieldgroup.PropertyId;
 import com.vaadin.data.util.BeanItem;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.TextArea;
 import com.vaadin.ui.TextField;
 
-public class FormUsingExistingLayout extends AbstractTestRoot {
+public class FormUsingExistingLayout extends AbstractTestUI {
 
     public static class Notice {
         String firstName;
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/FormatTableValue.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/FormatTableValue.java
index e487c6d3c4..5dd9322364 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/FormatTableValue.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/FormatTableValue.java
@@ -5,10 +5,10 @@ import java.util.Locale;
 
 import com.vaadin.data.util.converter.StringToNumberConverter;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.ui.Table;
 
-public class FormatTableValue extends AbstractTestRoot {
+public class FormatTableValue extends AbstractTestUI {
 
     private static final String PERCENT_PROPERTY = "percent";
     private static final String CURRENCY_PROPERTY = "currency";
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/IntegerTextFieldDataSource.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/IntegerTextFieldDataSource.java
index af60b0e9e3..38a578189a 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/IntegerTextFieldDataSource.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/IntegerTextFieldDataSource.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.minitutorials.v7a1;
 import com.vaadin.data.Property;
 import com.vaadin.data.util.BeanItem;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
@@ -11,7 +11,7 @@ import com.vaadin.ui.Label;
 import com.vaadin.ui.Notification;
 import com.vaadin.ui.TextField;
 
-public class IntegerTextFieldDataSource extends AbstractTestRoot {
+public class IntegerTextFieldDataSource extends AbstractTestUI {
 
     public class MyBean {
         private int value;
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/IntegerTextFieldStandalone.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/IntegerTextFieldStandalone.java
index f733b5df40..9d968f360a 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/IntegerTextFieldStandalone.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/IntegerTextFieldStandalone.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.minitutorials.v7a1;
 import com.vaadin.data.util.converter.Converter.ConversionException;
 import com.vaadin.data.util.converter.StringToIntegerConverter;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
@@ -11,7 +11,7 @@ import com.vaadin.ui.Label;
 import com.vaadin.ui.Notification;
 import com.vaadin.ui.TextField;
 
-public class IntegerTextFieldStandalone extends AbstractTestRoot {
+public class IntegerTextFieldStandalone extends AbstractTestUI {
 
     @Override
     protected void setup(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/MultiTabApplication.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/MultiTabApplication.java
index d2b1ed95e0..d82f4b1382 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/MultiTabApplication.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/MultiTabApplication.java
@@ -20,7 +20,7 @@ import com.vaadin.terminal.ExternalResource;
 import com.vaadin.terminal.WrappedRequest;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Link;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 import com.vaadin.ui.VerticalLayout;
 
 /**
@@ -30,7 +30,7 @@ import com.vaadin.ui.VerticalLayout;
  * @author Vaadin Ltd
  * @since 7.0.0
  */
-public class MultiTabApplication extends Root {
+public class MultiTabApplication extends UI {
 
     private class MainView extends VerticalLayout {
         public MainView() {
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/StringMyTypeConverter.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/StringMyTypeConverter.java
index c2393300f2..67a795a314 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/StringMyTypeConverter.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/StringMyTypeConverter.java
@@ -5,14 +5,14 @@ import java.util.Locale;
 import com.vaadin.data.util.converter.Converter;
 import com.vaadin.data.util.converter.Converter.ConversionException;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.Notification;
 import com.vaadin.ui.TextField;
 
-public class StringMyTypeConverter extends AbstractTestRoot {
+public class StringMyTypeConverter extends AbstractTestUI {
 
     @Override
     protected void setup(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/UsingBeanValidation.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/UsingBeanValidation.java
index 906ace6f53..c2f983c9bb 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/UsingBeanValidation.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/UsingBeanValidation.java
@@ -23,7 +23,7 @@ import javax.validation.constraints.Size;
 import com.vaadin.data.util.BeanItem;
 import com.vaadin.data.validator.BeanValidator;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 import com.vaadin.ui.TextField;
 
 /**
@@ -34,7 +34,7 @@ import com.vaadin.ui.TextField;
  * @author Vaadin Ltd
  * @since 7.0.0
  */
-public class UsingBeanValidation extends Root {
+public class UsingBeanValidation extends UI {
     class Person {
 
         @Size(min = 5, max = 50)
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/UsingUriFragments.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/UsingUriFragments.java
index db6ee57477..042c02316f 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/UsingUriFragments.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/UsingUriFragments.java
@@ -22,7 +22,7 @@ import com.vaadin.terminal.WrappedRequest;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
 /**
  * Mini tutorial code for
@@ -31,7 +31,7 @@ import com.vaadin.ui.Root;
  * @author Vaadin Ltd
  * @since 7.0.0
  */
-public class UsingUriFragments extends Root {
+public class UsingUriFragments extends UI {
 
     @Override
     protected void init(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/UsingXyzWhenInitializing.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/UsingXyzWhenInitializing.java
index 64b643a185..4a689d8c12 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a1/UsingXyzWhenInitializing.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a1/UsingXyzWhenInitializing.java
@@ -18,7 +18,7 @@ package com.vaadin.tests.minitutorials.v7a1;
 
 import com.vaadin.terminal.WrappedRequest;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
 /**
  * Mini tutorial code for
@@ -28,7 +28,7 @@ import com.vaadin.ui.Root;
  * @author Vaadin Ltd
  * @since 7.0.0
  */
-public class UsingXyzWhenInitializing extends Root {
+public class UsingXyzWhenInitializing extends UI {
 
     @Override
     protected void init(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a2/ComponentInStateRoot.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a2/ComponentInStateUI.java
index 0ed4a7781e..1bde122dbf 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a2/ComponentInStateRoot.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a2/ComponentInStateUI.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.minitutorials.v7a2;
 import com.vaadin.annotations.Widgetset;
 import com.vaadin.terminal.WrappedRequest;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
 /**
  * Mini tutorial code for
@@ -14,7 +14,7 @@ import com.vaadin.ui.Root;
  * @since 7.0.0
  */
 @Widgetset("com.vaadin.tests.widgetset.TestingWidgetSet")
-public class ComponentInStateRoot extends Root {
+public class ComponentInStateUI extends UI {
     @Override
     protected void init(WrappedRequest request) {
         ComponentInStateComponent component = new ComponentInStateComponent();
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a2/MyComponentRoot.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a2/MyComponentUI.java
index ef692ef8a3..d9091e4287 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a2/MyComponentRoot.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a2/MyComponentUI.java
@@ -18,7 +18,7 @@ package com.vaadin.tests.minitutorials.v7a2;
 
 import com.vaadin.annotations.Widgetset;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
 /**
  * Mini tutorial code for
@@ -33,7 +33,7 @@ import com.vaadin.ui.Root;
  * @since 7.0.0
  */
 @Widgetset("com.vaadin.tests.widgetset.TestingWidgetSet")
-public class MyComponentRoot extends Root {
+public class MyComponentUI extends UI {
 
     @Override
     protected void init(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a2/ResourceInStateRoot.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a2/ResourceInStateUI.java
index 69c2a0d040..37f4255cdd 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a2/ResourceInStateRoot.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a2/ResourceInStateUI.java
@@ -19,7 +19,7 @@ package com.vaadin.tests.minitutorials.v7a2;
 import com.vaadin.annotations.Widgetset;
 import com.vaadin.terminal.ThemeResource;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
 /**
  * Mini tutorial code for
@@ -30,7 +30,7 @@ import com.vaadin.ui.Root;
  * @since 7.0.0
  */
 @Widgetset("com.vaadin.tests.widgetset.TestingWidgetSet")
-public class ResourceInStateRoot extends Root {
+public class ResourceInStateUI extends UI {
 
     @Override
     protected void init(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a2/WidgetcontainerRoot.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a2/WidgetcontainerUI.java
index fae4265750..8c728548c0 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a2/WidgetcontainerRoot.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a2/WidgetcontainerUI.java
@@ -10,10 +10,10 @@ import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.CheckBox;
 import com.vaadin.ui.Component;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
 @Widgetset("com.vaadin.tests.widgetset.TestingWidgetSet")
-public class WidgetcontainerRoot extends Root {
+public class WidgetcontainerUI extends UI {
     @Override
     public void init(WrappedRequest request) {
         Label label = new Label("Hello Vaadin user");
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a3/Analytics.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a3/Analytics.java
index 6c247cae44..6f2be3c7d7 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a3/Analytics.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a3/Analytics.java
@@ -19,7 +19,7 @@ package com.vaadin.tests.minitutorials.v7a3;
 import com.vaadin.annotations.JavaScript;
 import com.vaadin.terminal.AbstractJavaScriptExtension;
 import com.vaadin.terminal.gwt.server.ClientConnector;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
 @JavaScript("analytics_connector.js")
 public class Analytics extends AbstractJavaScriptExtension {
@@ -38,12 +38,12 @@ public class Analytics extends AbstractJavaScriptExtension {
         callFunction("pushCommand", (Object) commandAndArguments);
     }
 
-    protected void extend(Root root) {
-        super.extend(root);
+    protected void extend(UI uI) {
+        super.extend(uI);
     }
 
     @Override
     protected Class<? extends ClientConnector> getSupportedParentType() {
-        return Root.class;
+        return UI.class;
     }
 }
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a3/AnalyticsRoot.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a3/AnalyticsUI.java
index df588b6f2d..bae3c4fc9c 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a3/AnalyticsRoot.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a3/AnalyticsUI.java
@@ -19,9 +19,9 @@ package com.vaadin.tests.minitutorials.v7a3;
 import com.vaadin.terminal.WrappedRequest;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
-public class AnalyticsRoot extends Root {
+public class AnalyticsUI extends UI {
 
     @Override
     protected void init(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a3/ComplexTypesComponent.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a3/ComplexTypesComponent.java
index 9a477bf6dd..5b6a693389 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a3/ComplexTypesComponent.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a3/ComplexTypesComponent.java
@@ -25,7 +25,7 @@ import java.util.Map;
 import com.vaadin.annotations.JavaScript;
 import com.vaadin.shared.Connector;
 import com.vaadin.ui.AbstractJavaScriptComponent;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
 @JavaScript("complex_types_connector.js")
 public class ComplexTypesComponent extends AbstractJavaScriptComponent {
@@ -45,7 +45,7 @@ public class ComplexTypesComponent extends AbstractJavaScriptComponent {
 
         Map<Connector, String> connectorMap = new HashMap<Connector, String>();
         connectorMap.put(this, "this");
-        connectorMap.put(Root.getCurrent(), "root");
+        connectorMap.put(UI.getCurrent(), "root");
 
         boolean[] bits = { true, true, false, true };
 
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a3/ComplexTypesRoot.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a3/ComplexTypesUI.java
index 5e19d8ab1a..093f3269e0 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a3/ComplexTypesRoot.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a3/ComplexTypesUI.java
@@ -17,9 +17,9 @@
 package com.vaadin.tests.minitutorials.v7a3;
 
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
-public class ComplexTypesRoot extends Root {
+public class ComplexTypesUI extends UI {
 
     @Override
     protected void init(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a3/FlotJavaScriptRoot.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a3/FlotJavaScriptUI.java
index f0584c2147..02bd8a7cce 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a3/FlotJavaScriptRoot.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a3/FlotJavaScriptUI.java
@@ -19,9 +19,9 @@ package com.vaadin.tests.minitutorials.v7a3;
 import com.vaadin.terminal.WrappedRequest;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
-public class FlotJavaScriptRoot extends Root {
+public class FlotJavaScriptUI extends UI {
 
     @Override
     protected void init(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/minitutorials/v7a3/RedButtonRoot.java b/tests/testbench/com/vaadin/tests/minitutorials/v7a3/RedButtonUI.java
index 1bf30b0054..9384394870 100644
--- a/tests/testbench/com/vaadin/tests/minitutorials/v7a3/RedButtonRoot.java
+++ b/tests/testbench/com/vaadin/tests/minitutorials/v7a3/RedButtonUI.java
@@ -17,9 +17,9 @@
 package com.vaadin.tests.minitutorials.v7a3;
 
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
-public class RedButtonRoot extends Root {
+public class RedButtonUI extends UI {
     @Override
     protected void init(WrappedRequest request) {
         addComponent(new RedButton("My red button"));
diff --git a/tests/testbench/com/vaadin/tests/serialization/DelegateToWidgetTest.html b/tests/testbench/com/vaadin/tests/serialization/DelegateToWidgetTest.html
new file mode 100644
index 0000000000..12228eb9f0
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/serialization/DelegateToWidgetTest.html
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head profile="http://selenium-ide.openqa.org/profiles/test-case">
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+<link rel="selenium.base" href="" />
+<title>New Test</title>
+</head>
+<body>
+<table cellpadding="1" cellspacing="1" border="1">
+<thead>
+<tr><td rowspan="1" colspan="3">New Test</td></tr>
+</thead><tbody>
+<tr>
+	<td>open</td>
+	<td>/run/com.vaadin.tests.serialization.DelegateToWidgetTest?restartApplication</td>
+	<td></td>
+</tr>
+<tr>
+	<td>assertText</td>
+	<td>vaadin=runcomvaadintestsserializationDelegateToWidgetTest::/VVerticalLayout[0]/VVerticalLayout[0]/DelegateWidget[0]</td>
+	<td>My String<br />42<br />true<br />3.141592653589793</td>
+</tr>
+</tbody></table>
+</body>
+</html>
diff --git a/tests/testbench/com/vaadin/tests/serialization/DelegateToWidgetTest.java b/tests/testbench/com/vaadin/tests/serialization/DelegateToWidgetTest.java
new file mode 100644
index 0000000000..b775c18f8f
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/serialization/DelegateToWidgetTest.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2011 Vaadin Ltd.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.vaadin.tests.serialization;
+
+import com.vaadin.annotations.Widgetset;
+import com.vaadin.terminal.WrappedRequest;
+import com.vaadin.tests.components.AbstractTestUI;
+import com.vaadin.tests.widgetset.TestingWidgetSet;
+import com.vaadin.tests.widgetset.server.DelegateToWidgetComponent;
+
+@Widgetset(TestingWidgetSet.NAME)
+public class DelegateToWidgetTest extends AbstractTestUI {
+    @Override
+    protected void setup(WrappedRequest request) {
+        addComponent(new DelegateToWidgetComponent());
+    }
+
+    @Override
+    protected String getTestDescription() {
+        return "Verifies that @DelegateToWidget has the desired effect";
+    }
+
+    @Override
+    protected Integer getTicketNumber() {
+        return Integer.valueOf(9297);
+    }
+
+}
diff --git a/tests/testbench/com/vaadin/tests/serialization/SerializerNamespaceTest.html b/tests/testbench/com/vaadin/tests/serialization/SerializerNamespaceTest.html
new file mode 100644
index 0000000000..70d0e905f5
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/serialization/SerializerNamespaceTest.html
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
+<head profile="http://selenium-ide.openqa.org/profiles/test-case">
+<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+<link rel="selenium.base" href="" />
+<title>New Test</title>
+</head>
+<body>
+<table cellpadding="1" cellspacing="1" border="1">
+<thead>
+<tr><td rowspan="1" colspan="3">New Test</td></tr>
+</thead><tbody>
+<tr>
+	<td>open</td>
+	<td>/run/com.vaadin.tests.serialization.SerializerNamespaceTest?restartApplication</td>
+	<td></td>
+</tr>
+<tr>
+	<td>assertText</td>
+	<td>vaadin=runcomvaadintestsserializationSerializerNamespaceTest::/VVerticalLayout[0]/VVerticalLayout[0]/VLabel[0]</td>
+	<td>The real label</td>
+</tr>
+<tr>
+	<td>assertText</td>
+	<td>vaadin=runcomvaadintestsserializationSerializerNamespaceTest::/VVerticalLayout[0]/VVerticalLayout[0]/VLabel[1]</td>
+	<td>The dummy label</td>
+</tr>
+</tbody></table>
+</body>
+</html>
diff --git a/tests/testbench/com/vaadin/tests/serialization/SerializerNamespaceTest.java b/tests/testbench/com/vaadin/tests/serialization/SerializerNamespaceTest.java
index 6a873a6be3..0bb3b6c542 100644
--- a/tests/testbench/com/vaadin/tests/serialization/SerializerNamespaceTest.java
+++ b/tests/testbench/com/vaadin/tests/serialization/SerializerNamespaceTest.java
@@ -18,12 +18,13 @@ package com.vaadin.tests.serialization;
 
 import com.vaadin.annotations.Widgetset;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
+import com.vaadin.tests.widgetset.TestingWidgetSet;
 import com.vaadin.tests.widgetset.server.DummyLabel;
 import com.vaadin.ui.Label;
 
-@Widgetset("com.vaadin.tests.widgetset.TestingWidgetSet")
-public class SerializerNamespaceTest extends AbstractTestRoot {
+@Widgetset(TestingWidgetSet.NAME)
+public class SerializerNamespaceTest extends AbstractTestUI {
 
     @Override
     protected void setup(WrappedRequest request) {
@@ -33,7 +34,7 @@ public class SerializerNamespaceTest extends AbstractTestRoot {
 
     @Override
     protected String getTestDescription() {
-        return "Using connectors with different state classes having the same simple name should not cause any clietn-side exceptions";
+        return "Using connectors with different state classes having the same simple name should not cause any client-side exceptions";
     }
 
     @Override
diff --git a/tests/testbench/com/vaadin/tests/serialization/SerializerTest.java b/tests/testbench/com/vaadin/tests/serialization/SerializerTest.java
index a301ecf828..6ad6b6d530 100644
--- a/tests/testbench/com/vaadin/tests/serialization/SerializerTest.java
+++ b/tests/testbench/com/vaadin/tests/serialization/SerializerTest.java
@@ -30,7 +30,7 @@ import com.vaadin.annotations.Widgetset;
 import com.vaadin.shared.Connector;
 import com.vaadin.shared.ui.label.ContentMode;
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 import com.vaadin.tests.util.Log;
 import com.vaadin.tests.widgetset.client.ComplexTestBean;
 import com.vaadin.tests.widgetset.client.SerializerTestRpc;
@@ -38,7 +38,7 @@ import com.vaadin.tests.widgetset.client.SimpleTestBean;
 import com.vaadin.tests.widgetset.server.SerializerTestExtension;
 
 @Widgetset("com.vaadin.tests.widgetset.TestingWidgetSet")
-public class SerializerTest extends AbstractTestRoot {
+public class SerializerTest extends AbstractTestUI {
 
     private Log log = new Log(40);
 
@@ -98,12 +98,12 @@ public class SerializerTest extends AbstractTestRoot {
         }, new HashMap<Connector, Boolean>() {
             {
                 put(testExtension, true);
-                put(getRoot(), false);
+                put(getUI(), false);
             }
         }, new HashMap<Integer, Connector>() {
             {
                 put(5, testExtension);
-                put(10, getRoot());
+                put(10, getUI());
             }
         }, new HashMap<SimpleTestBean, SimpleTestBean>() {
             {
diff --git a/tests/testbench/com/vaadin/tests/themes/ButtonsTest.java b/tests/testbench/com/vaadin/tests/themes/ButtonsTest.java
index a2d482dfbf..62160d233a 100644
--- a/tests/testbench/com/vaadin/tests/themes/ButtonsTest.java
+++ b/tests/testbench/com/vaadin/tests/themes/ButtonsTest.java
@@ -10,13 +10,13 @@ import com.vaadin.ui.CheckBox;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Layout;
 import com.vaadin.ui.NativeButton;
-import com.vaadin.ui.Root;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI;
+import com.vaadin.ui.UI.LegacyWindow;
 
 @SuppressWarnings("serial")
 public class ButtonsTest extends com.vaadin.Application.LegacyApplication {
 
-    final Root.LegacyWindow main = new LegacyWindow("Button states & themes");
+    final UI.LegacyWindow main = new LegacyWindow("Button states & themes");
 
     CheckBox styleToggle;
     CheckBox iconToggle;
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1225.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1225.java
index 299c939043..8c99fe6ebb 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1225.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1225.java
@@ -5,7 +5,7 @@ import com.vaadin.shared.ui.label.ContentMode;
 import com.vaadin.tests.TestForTablesInitialColumnWidthLogicRendering;
 import com.vaadin.ui.Alignment;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TabSheet;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1230.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1230.java
index b1841b69ba..e11d6ea024 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1230.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1230.java
@@ -6,7 +6,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.GridLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Select;
 
 public class Ticket1230 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket124.java b/tests/testbench/com/vaadin/tests/tickets/Ticket124.java
index 8761db1cc3..4bcf31a366 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket124.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket124.java
@@ -7,7 +7,7 @@ import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 public class Ticket124 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1245.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1245.java
index a5aa8cd2ac..6aa1c1752a 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1245.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1245.java
@@ -5,7 +5,7 @@ import com.vaadin.data.Property;
 import com.vaadin.ui.AbstractSelect;
 import com.vaadin.ui.CustomComponent;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.Tree;
 import com.vaadin.ui.VerticalLayout;
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1365.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1365.java
index 7e9f5dab2c..c617b07248 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1365.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1365.java
@@ -4,7 +4,7 @@ import com.vaadin.event.Action;
 import com.vaadin.event.Action.Handler;
 import com.vaadin.event.ShortcutAction;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 public class Ticket1365 extends com.vaadin.Application.LegacyApplication
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1368.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1368.java
index 92d3598382..16b47a1f31 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1368.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1368.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.tests.TestForTablesInitialColumnWidthLogicRendering;
 import com.vaadin.ui.ComboBox;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 
 /**
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1397.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1397.java
index 3ba7ae2bfa..e162e96bfa 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1397.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1397.java
@@ -10,7 +10,7 @@ import com.vaadin.ui.InlineDateField;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
 import com.vaadin.ui.PopupView;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.TextField;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1435.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1435.java
index d6d3b132c3..d46a56f73a 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1435.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1435.java
@@ -12,7 +12,7 @@ import com.vaadin.ui.Label;
 import com.vaadin.ui.Layout;
 import com.vaadin.ui.Layout.MarginHandler;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1444.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1444.java
index a597a5b242..1da3b5c290 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1444.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1444.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.shared.ui.label.ContentMode;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket1444 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1465ModalNotification.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1465ModalNotification.java
index 4b7d4201e0..3c766ef985 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1465ModalNotification.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1465ModalNotification.java
@@ -5,7 +5,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Notification;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Window;
 
 public class Ticket1465ModalNotification extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1519.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1519.java
index 1c4156d7ff..8b1736637b 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1519.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1519.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.tickets;
 
 import com.vaadin.Application;
 import com.vaadin.ui.CustomLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TabSheet;
 
 public class Ticket1519 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1572.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1572.java
index 87ea7e86a8..a511bae6d9 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1572.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1572.java
@@ -7,7 +7,7 @@ import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket1572 extends com.vaadin.Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1581.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1581.java
index 6831d4c52d..5025605413 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1581.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1581.java
@@ -7,7 +7,7 @@ import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.ProgressIndicator;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket1581 extends com.vaadin.Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1589.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1589.java
index 95cc918b6e..92a480c3d2 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1589.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1589.java
@@ -17,7 +17,7 @@ import com.vaadin.terminal.RequestHandler;
 import com.vaadin.terminal.WrappedRequest;
 import com.vaadin.terminal.WrappedResponse;
 import com.vaadin.ui.Link;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket1589 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1598.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1598.java
index 5cb03e77af..05fd0c3f1f 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1598.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1598.java
@@ -8,7 +8,7 @@ import com.vaadin.terminal.ThemeResource;
 import com.vaadin.ui.MenuBar;
 import com.vaadin.ui.MenuBar.Command;
 import com.vaadin.ui.MenuBar.MenuItem;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket1598 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket161.java b/tests/testbench/com/vaadin/tests/tickets/Ticket161.java
index b8bf8deb20..4da1b3a6b4 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket161.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket161.java
@@ -5,7 +5,7 @@ import com.vaadin.data.Container;
 import com.vaadin.tests.TestForTablesInitialColumnWidthLogicRendering;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 
 /**
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1632.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1632.java
index 43feab5ab7..bca902a73f 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1632.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1632.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.data.Item;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 
 /**
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1659.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1659.java
index 3c64a49316..55d08069ed 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1659.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1659.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.terminal.ExternalResource;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket1659 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1663.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1663.java
index 64d53e33f6..b07e9df0e5 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1663.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1663.java
@@ -1,7 +1,7 @@
 package com.vaadin.tests.tickets;
 
 import com.vaadin.terminal.SystemError;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 public class Ticket1663 extends com.vaadin.Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1673.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1673.java
index 277096598e..99f213541a 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1673.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1673.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket1673 extends com.vaadin.Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1710.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1710.java
index 6547572e6d..d3c2437219 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1710.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1710.java
@@ -24,7 +24,7 @@ import com.vaadin.ui.Layout;
 import com.vaadin.ui.Layout.AlignmentHandler;
 import com.vaadin.ui.NativeSelect;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1737.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1737.java
index ccd649c542..364ad9b6cf 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1737.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1737.java
@@ -7,7 +7,7 @@ import com.vaadin.terminal.Resource;
 import com.vaadin.ui.Embedded;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket1737 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1767.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1767.java
index bf57118a8c..eca0c0f833 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1767.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1767.java
@@ -1,7 +1,7 @@
 package com.vaadin.tests.tickets;
 
 import com.vaadin.ui.ComboBox;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket1767 extends com.vaadin.Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1772.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1772.java
index 2cbb648227..a269acc1e0 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1772.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1772.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.GridLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 public class Ticket1772 extends com.vaadin.Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1775.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1775.java
index 63af96b1a2..ec28a957bb 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1775.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1775.java
@@ -4,7 +4,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.CustomLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket1775 extends com.vaadin.Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1804.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1804.java
index 0a89675fc0..780215aa2a 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1804.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1804.java
@@ -11,7 +11,7 @@ import com.vaadin.ui.AbstractField;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Select;
 import com.vaadin.ui.Window;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1805.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1805.java
index e5fcf59db8..7f5c684479 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1805.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1805.java
@@ -7,7 +7,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Layout.MarginHandler;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 public class Ticket1805 extends com.vaadin.Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1806.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1806.java
index fa572039aa..8359b024aa 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1806.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1806.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.data.util.ObjectProperty;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 public class Ticket1806 extends com.vaadin.Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1811.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1811.java
index 695be19300..824c58436f 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1811.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1811.java
@@ -9,7 +9,7 @@ import com.vaadin.shared.ui.label.ContentMode;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.Window;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1819.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1819.java
index 42474d748d..e16b2c2774 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1819.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1819.java
@@ -8,7 +8,7 @@ import com.vaadin.ui.AbstractField;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Select;
 import com.vaadin.ui.Window;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1834PanelScrolling.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1834PanelScrolling.java
index e31748ec2f..f7329037cc 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1834PanelScrolling.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1834PanelScrolling.java
@@ -6,7 +6,7 @@ import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket1834PanelScrolling extends
         com.vaadin.Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1857.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1857.java
index 4b546de0f6..039f867fff 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1857.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1857.java
@@ -7,7 +7,7 @@ import com.vaadin.event.Action;
 import com.vaadin.event.Action.Handler;
 import com.vaadin.ui.CheckBox;
 import com.vaadin.ui.HorizontalLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1868.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1868.java
index 1af0ed2041..8bd4a77204 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1868.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1868.java
@@ -1,7 +1,7 @@
 package com.vaadin.tests.tickets;
 
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket1868 extends com.vaadin.Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1869.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1869.java
index d51c0990ae..741adecae4 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1869.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1869.java
@@ -4,7 +4,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket1869 extends com.vaadin.Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1878.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1878.java
index 0a8992c17f..1b60d535cf 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1878.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1878.java
@@ -23,7 +23,7 @@ import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Layout;
 import com.vaadin.ui.Layout.AlignmentHandler;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1900.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1900.java
index 9fe8ccd801..136af23474 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1900.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1900.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.data.Property;
 import com.vaadin.data.Property.ValueChangeEvent;
 import com.vaadin.data.Validator;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 public class Ticket1900 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1904.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1904.java
index 2837d71e67..f35463f6a8 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1904.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1904.java
@@ -5,7 +5,7 @@ import com.vaadin.ui.AbstractOrderedLayout;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket1904 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1916.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1916.java
index 790d3aa931..3b50804938 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1916.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1916.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.terminal.UserError;
 import com.vaadin.ui.Alignment;
 import com.vaadin.ui.HorizontalLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 public class Ticket1916 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1919.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1919.java
index 75a2aafb96..8e9e0cb0ba 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1919.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1919.java
@@ -5,7 +5,7 @@ import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Component;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket1919 extends com.vaadin.Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1921.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1921.java
index 416bb80875..3d79de5d1d 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1921.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1921.java
@@ -10,7 +10,7 @@ import com.vaadin.terminal.WrappedResponse;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket1921 extends Application.LegacyApplication implements
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1923.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1923.java
index 17a7dacf26..2bde4c95ec 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1923.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1923.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.tickets;
 
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket1923 extends com.vaadin.Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1925.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1925.java
index 91ea8c0c44..b5d938dbed 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1925.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1925.java
@@ -1,7 +1,7 @@
 package com.vaadin.tests.tickets;
 
 import com.vaadin.Application;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket1925 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1939.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1939.java
index 48d8ff458c..f65fbf9852 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1939.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1939.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1940.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1940.java
index 10eebe4cba..1a27e1ad28 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1940.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1940.java
@@ -1,7 +1,7 @@
 package com.vaadin.tests.tickets;
 
 import com.vaadin.Application;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1953.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1953.java
index a832401cd0..9bf4ddee51 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1953.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1953.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket1953 extends Application.LegacyApplication {
     public static final String cellStyle = "test-cell";
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1966.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1966.java
index d461ffe4e3..9440855bbe 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1966.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1966.java
@@ -9,7 +9,7 @@ import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Layout;
 import com.vaadin.ui.Layout.AlignmentHandler;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket1966 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1966_2.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1966_2.java
index 85b802d46c..c5442e6473 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1966_2.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1966_2.java
@@ -9,7 +9,7 @@ import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Layout;
 import com.vaadin.ui.Layout.AlignmentHandler;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket1966_2 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1966_3.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1966_3.java
index cfc9825b58..63634259a3 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1966_3.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1966_3.java
@@ -6,7 +6,7 @@ import com.vaadin.terminal.UserError;
 import com.vaadin.ui.Alignment;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1969.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1969.java
index 2a29113829..b10ccea992 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1969.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1969.java
@@ -5,7 +5,7 @@ import com.vaadin.tests.TestForTablesInitialColumnWidthLogicRendering;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TabSheet;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1970.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1970.java
index f9f098a05a..b07a997f8f 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1970.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1970.java
@@ -7,7 +7,7 @@ import com.vaadin.shared.ui.label.ContentMode;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket1970 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1972.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1972.java
index fd77343259..6b406a2f89 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1972.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1972.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket1972 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1973.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1973.java
index 24d11e6569..a3365bedcb 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1973.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1973.java
@@ -4,7 +4,7 @@ import com.vaadin.data.Item;
 import com.vaadin.data.util.IndexedContainer;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Component;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1973_2.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1973_2.java
index 68307f7f99..4392c0762a 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1973_2.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1973_2.java
@@ -5,7 +5,7 @@ import com.vaadin.data.Item;
 import com.vaadin.data.util.IndexedContainer;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Component;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1975.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1975.java
index e959098765..fda75a409e 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1975.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1975.java
@@ -11,7 +11,7 @@ import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.CustomLayout;
 import com.vaadin.ui.GridLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket1975 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1982.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1982.java
index fe0b636c56..a5953d22af 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1982.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1982.java
@@ -10,7 +10,7 @@ import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket1982 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1983.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1983.java
index 4db82c3371..0d6a21faac 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1983.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1983.java
@@ -9,7 +9,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.CheckBox;
 import com.vaadin.ui.HorizontalSplitPanel;
 import com.vaadin.ui.Layout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1986.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1986.java
index 88ebad933f..fd6665b2fe 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1986.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1986.java
@@ -8,7 +8,7 @@ import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.ListSelect;
 import com.vaadin.ui.NativeSelect;
 import com.vaadin.ui.OptionGroup;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.TwinColSelect;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1991.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1991.java
index 72866a3ee8..ed60c89c16 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1991.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1991.java
@@ -1,7 +1,7 @@
 package com.vaadin.tests.tickets;
 
 import com.vaadin.ui.CheckBox;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 
 public class Ticket1991 extends com.vaadin.Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket1995.java b/tests/testbench/com/vaadin/tests/tickets/Ticket1995.java
index 2aaacef448..04ce9c712d 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket1995.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket1995.java
@@ -7,7 +7,7 @@ import com.vaadin.data.Item;
 import com.vaadin.data.util.filter.SimpleStringFilter;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 
 public class Ticket1995 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket20.java b/tests/testbench/com/vaadin/tests/tickets/Ticket20.java
index 061fc0cf16..ea610a3db8 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket20.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket20.java
@@ -8,7 +8,7 @@ import com.vaadin.data.validator.CompositeValidator.CombinationMode;
 import com.vaadin.data.validator.IntegerValidator;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.CheckBox;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 public class Ticket20 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2001.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2001.java
index 8c7a7ba659..8ff3d952c4 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2001.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2001.java
@@ -5,7 +5,7 @@ import com.vaadin.data.Property;
 import com.vaadin.data.Property.ValueChangeEvent;
 import com.vaadin.ui.CheckBox;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket2001 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2002.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2002.java
index 2c4a948cea..aeaf3bfb33 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2002.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2002.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.data.util.MethodProperty;
 import com.vaadin.ui.GridLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 public class Ticket2002 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2007.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2007.java
index e0b8635f32..0342b87e68 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2007.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2007.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.terminal.ExternalResource;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2007 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2009.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2009.java
index 68cf5ef6d4..e79ec8905e 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2009.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2009.java
@@ -8,7 +8,7 @@ import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.Tree;
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2011.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2011.java
index e8113b0cea..754036cd5b 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2011.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2011.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.tickets;
 
 import com.vaadin.Application;
 import com.vaadin.ui.GridLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Select;
 
 public class Ticket2011 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2014.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2014.java
index 8d9a5e67d4..bf909acb35 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2014.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2014.java
@@ -9,7 +9,7 @@ import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2014 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2021.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2021.java
index f6d8ce5e01..c23f031a91 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2021.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2021.java
@@ -11,7 +11,7 @@ import com.vaadin.ui.Label;
 import com.vaadin.ui.Layout;
 import com.vaadin.ui.Layout.MarginHandler;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextArea;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2022.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2022.java
index bc97f906b1..ea142b7e9e 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2022.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2022.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.tickets;
 
 import com.vaadin.Application;
 import com.vaadin.ui.CustomLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2022 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2023.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2023.java
index 427a55391b..c6b2c0f28a 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2023.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2023.java
@@ -4,7 +4,7 @@ import com.vaadin.ui.AbstractComponent;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.GridLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2023 extends com.vaadin.Application.LegacyApplication
         implements Button.ClickListener {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2024.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2024.java
index e7cabbca95..b1a8b64931 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2024.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2024.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2026.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2026.java
index 6d608ad529..0b72073bec 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2026.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2026.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.tickets;
 
 import com.vaadin.Application;
 import com.vaadin.ui.GridLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 public class Ticket2026 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2029.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2029.java
index 8acf4f1d16..ba8936adfa 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2029.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2029.java
@@ -11,7 +11,7 @@ import com.vaadin.ui.Component;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextArea;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2037.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2037.java
index c979898299..da47f796a5 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2037.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2037.java
@@ -4,7 +4,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Layout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket2037 extends com.vaadin.Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2038.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2038.java
index fa4cd76f47..c4714783a0 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2038.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2038.java
@@ -5,7 +5,7 @@ import com.vaadin.data.Property;
 import com.vaadin.data.Property.ValueChangeEvent;
 import com.vaadin.ui.CheckBox;
 import com.vaadin.ui.Notification;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 public class Ticket2038 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2040.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2040.java
index d98656b9ca..a7ca7b179f 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2040.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2040.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.ui.Accordion;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Layout.MarginHandler;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextArea;
 import com.vaadin.ui.TextField;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2042.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2042.java
index d79f4a1bd6..49e999a601 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2042.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2042.java
@@ -7,7 +7,7 @@ import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Notification;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2042 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2043.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2043.java
index 7238462397..2efc66556d 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2043.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2043.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.terminal.ExternalResource;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Link;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2043 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2048.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2048.java
index 0b5a537b4d..110db06800 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2048.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2048.java
@@ -10,7 +10,7 @@ import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Layout;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket2048 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2051.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2051.java
index bd098443f2..1660f00d88 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2051.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2051.java
@@ -7,7 +7,7 @@ import com.vaadin.ui.Component;
 import com.vaadin.ui.DateField;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.TextField;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2053.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2053.java
index fd64d6e35a..362a763c2f 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2053.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2053.java
@@ -7,7 +7,7 @@ import com.vaadin.terminal.ExternalResource;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 public class Ticket2053 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2060.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2060.java
index 88404b6ef1..c9e91930bf 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2060.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2060.java
@@ -6,7 +6,7 @@ import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.HorizontalLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2060 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2061.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2061.java
index 1f633d7337..d86646b865 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2061.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2061.java
@@ -8,7 +8,7 @@ import com.vaadin.data.util.HierarchicalContainer;
 import com.vaadin.ui.Accordion;
 import com.vaadin.ui.Component;
 import com.vaadin.ui.CustomComponent;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TabSheet;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2061b.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2061b.java
index e3cd09926e..420d2b7086 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2061b.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2061b.java
@@ -12,7 +12,7 @@ import com.vaadin.ui.Component;
 import com.vaadin.ui.CustomComponent;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TabSheet;
 import com.vaadin.ui.TabSheet.SelectedTabChangeEvent;
 import com.vaadin.ui.TabSheet.SelectedTabChangeListener;
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2061c.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2061c.java
index 082b956fe0..b0897600d3 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2061c.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2061c.java
@@ -10,7 +10,7 @@ import com.vaadin.ui.Component;
 import com.vaadin.ui.CustomComponent;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TabSheet;
 import com.vaadin.ui.TabSheet.SelectedTabChangeEvent;
 import com.vaadin.ui.TabSheet.SelectedTabChangeListener;
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2062.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2062.java
index 5d91240c6a..9b2fe05514 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2062.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2062.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.tickets;
 
 import com.vaadin.Application;
 import com.vaadin.ui.HorizontalSplitPanel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TabSheet;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.TextField;
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2083.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2083.java
index ea77b6f2e6..87bea00023 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2083.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2083.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2083 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2090.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2090.java
index 2042cf7cad..e48aae7d9f 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2090.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2090.java
@@ -6,7 +6,7 @@ import com.vaadin.data.Property.ValueChangeEvent;
 import com.vaadin.terminal.UserError;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 public class Ticket2090 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2095.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2095.java
index a27ae7ac4d..258fad05c9 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2095.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2095.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.terminal.ExternalResource;
 import com.vaadin.ui.Embedded;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2095 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2098.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2098.java
index 5dc741eff6..a8a3e22d2b 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2098.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2098.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.tickets;
 
 import com.vaadin.Application;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TabSheet;
 
 public class Ticket2098 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2099.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2099.java
index 0f0c00b05c..2bba0504a5 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2099.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2099.java
@@ -6,7 +6,7 @@ import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TabSheet;
 import com.vaadin.ui.VerticalLayout;
 import com.vaadin.ui.Window;
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2101.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2101.java
index 67c3c9f331..c29eaaf453 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2101.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2101.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.tickets;
 
 import com.vaadin.Application;
 import com.vaadin.ui.Button;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2101 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2103.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2103.java
index 1fb89eebc4..9017f66158 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2103.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2103.java
@@ -5,7 +5,7 @@ import com.vaadin.data.Item;
 import com.vaadin.data.util.HierarchicalContainer;
 import com.vaadin.ui.Accordion;
 import com.vaadin.ui.Component;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2104.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2104.java
index b8a6724a41..4da938351d 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2104.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2104.java
@@ -11,7 +11,7 @@ import com.vaadin.terminal.ExternalResource;
 import com.vaadin.ui.CheckBox;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.Tree;
 
@@ -68,16 +68,16 @@ public class Ticket2104 extends Application.LegacyApplication {
         main.addComponent(tree);
         tree.setImmediate(true);
         tree.setNullSelectionAllowed(false);
-        tree.addItem("Root 1");
+        tree.addItem("UI 1");
         tree.addItem("1. Child 1");
-        tree.setParent("1. Child 1", "Root 1");
+        tree.setParent("1. Child 1", "UI 1");
         tree.addItem("1. Child 2");
-        tree.setParent("1. Child 2", "Root 1");
-        tree.addItem("Root 2");
+        tree.setParent("1. Child 2", "UI 1");
+        tree.addItem("UI 2");
         tree.addItem("2. Child 1");
-        tree.setParent("2. Child 1", "Root 2");
+        tree.setParent("2. Child 1", "UI 2");
         tree.addItem("2. Child 2");
-        tree.setParent("2. Child 2", "Root 2");
+        tree.setParent("2. Child 2", "UI 2");
         tree.addContainerProperty("icon", ExternalResource.class,
                 new ExternalResource(
                         "http://www.itmill.com/res/images/itmill_logo.gif"));
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2106.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2106.java
index 6edc625b39..9d6e198f03 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2106.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2106.java
@@ -6,7 +6,7 @@ import com.vaadin.Application;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2106 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2107.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2107.java
index 09ba9fac0b..37d570546b 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2107.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2107.java
@@ -6,7 +6,7 @@ import com.vaadin.data.Property.ValueChangeEvent;
 import com.vaadin.data.Validator;
 import com.vaadin.ui.CheckBox;
 import com.vaadin.ui.Notification;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 public class Ticket2107 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2117.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2117.java
index 8bbfe0cd07..d5b5041060 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2117.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2117.java
@@ -7,7 +7,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2117 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2119.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2119.java
index b563ec90ef..621b744aa8 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2119.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2119.java
@@ -8,7 +8,7 @@ import com.vaadin.terminal.ExternalResource;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Layout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Select;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2125.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2125.java
index b12a865e80..bc1f886418 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2125.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2125.java
@@ -5,7 +5,7 @@ import com.vaadin.data.util.MethodProperty;
 import com.vaadin.ui.CheckBox;
 import com.vaadin.ui.Component;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.Table.CellStyleGenerator;
 import com.vaadin.ui.Table.ColumnGenerator;
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2126.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2126.java
index c9e070bef4..d49c73ea5f 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2126.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2126.java
@@ -5,7 +5,7 @@ import com.vaadin.data.util.IndexedContainer;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Component;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 
 /**
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2151.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2151.java
index c2fbe1b4f7..721bdf3c9f 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2151.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2151.java
@@ -8,7 +8,7 @@ import com.vaadin.ui.AbstractOrderedLayout;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.CheckBox;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2151 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2157.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2157.java
index 23c5b0bcd5..b8f75fc279 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2157.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2157.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.ui.AbstractOrderedLayout;
 import com.vaadin.ui.ComboBox;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket2157 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2178.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2178.java
index 6de42003b4..e64db69ced 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2178.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2178.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.ui.AbstractOrderedLayout;
 import com.vaadin.ui.ComboBox;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket2178 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2179.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2179.java
index 31e1a9a0d6..622488dc0f 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2179.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2179.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.data.Property;
 import com.vaadin.data.Property.ValueChangeEvent;
 import com.vaadin.data.Validator;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 public class Ticket2179 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2180.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2180.java
index 7b993cdf24..fb9332d100 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2180.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2180.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TabSheet;
 
 public class Ticket2180 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2181.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2181.java
index 44893eb531..ceba214dc5 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2181.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2181.java
@@ -12,7 +12,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Component;
 import com.vaadin.ui.OptionGroup;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2186.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2186.java
index b7817d2ed7..50b8a1f113 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2186.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2186.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2204.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2204.java
index 4caba62df2..24c4d6e8b9 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2204.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2204.java
@@ -26,7 +26,7 @@ import com.vaadin.ui.Label;
 import com.vaadin.ui.Layout;
 import com.vaadin.ui.Panel;
 import com.vaadin.ui.RichTextArea;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TabSheet;
 import com.vaadin.ui.VerticalLayout;
 import com.vaadin.ui.VerticalSplitPanel;
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2208.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2208.java
index 3f0f35bb84..f622f093ee 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2208.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2208.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.data.Item;
 import com.vaadin.ui.Component;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.Table.CellStyleGenerator;
 import com.vaadin.ui.Table.ColumnGenerator;
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2209.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2209.java
index a387781ae3..ecad9a950a 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2209.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2209.java
@@ -7,7 +7,7 @@ import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.ComboBox;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2209 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2209OL.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2209OL.java
index 226df8b5e7..6eec0a7704 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2209OL.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2209OL.java
@@ -6,7 +6,7 @@ import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.ComboBox;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket2209OL extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2209OL2.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2209OL2.java
index 921f3b190b..7f4082d0f8 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2209OL2.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2209OL2.java
@@ -6,7 +6,7 @@ import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.ComboBox;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket2209OL2 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2215.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2215.java
index 5b98fe3af3..f7099d88f4 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2215.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2215.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 import com.vaadin.ui.themes.Reindeer;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2221.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2221.java
index 886aa376c3..e3f1516fb8 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2221.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2221.java
@@ -9,7 +9,7 @@ import com.vaadin.ui.Component;
 import com.vaadin.ui.CustomComponent;
 import com.vaadin.ui.Layout;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2222.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2222.java
index 51ac463a6e..14024fda8b 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2222.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2222.java
@@ -5,7 +5,7 @@ import com.vaadin.ui.AbstractOrderedLayout;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket2222 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2227OrderedlayoutInTable.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2227OrderedlayoutInTable.java
index e436bab283..f9c670708e 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2227OrderedlayoutInTable.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2227OrderedlayoutInTable.java
@@ -5,7 +5,7 @@ import com.vaadin.data.Item;
 import com.vaadin.ui.Component;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Layout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2231.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2231.java
index ab0cc82628..21994bff60 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2231.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2231.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.ui.AbstractOrderedLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2231 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2232.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2232.java
index ae8a4b0f51..d71134696f 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2232.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2232.java
@@ -6,7 +6,7 @@ import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Layout;
 import com.vaadin.ui.Layout.SpacingHandler;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket2232 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2234.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2234.java
index 24a6d2ea77..ccda59bb6a 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2234.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2234.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.data.Item;
 import com.vaadin.ui.AbstractOrderedLayout;
 import com.vaadin.ui.ComboBox;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2234 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2235.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2235.java
index 10978cad30..fba82956e0 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2235.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2235.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.tickets;
 
 import com.vaadin.Application;
 import com.vaadin.ui.AbstractOrderedLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextArea;
 
 public class Ticket2235 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2240.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2240.java
index c777d0772f..bb16a40cd7 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2240.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2240.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.shared.ui.label.ContentMode;
 import com.vaadin.ui.AbstractOrderedLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 public class Ticket2240 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2242.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2242.java
index 4b44ed1a87..77fbfefe1a 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2242.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2242.java
@@ -10,7 +10,7 @@ import com.vaadin.ui.AbstractOrderedLayout;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 
 public class Ticket2242 extends Application.LegacyApplication implements
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2244.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2244.java
index a360760039..495e3de26a 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2244.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2244.java
@@ -8,7 +8,7 @@ import com.vaadin.ui.Form;
 import com.vaadin.ui.FormLayout;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2244 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2245.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2245.java
index 1586a1966b..ab474fe6f7 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2245.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2245.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.tickets;
 
 import com.vaadin.Application;
 import com.vaadin.ui.HorizontalSplitPanel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2245 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2267.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2267.java
index b5d6772e7f..41843a9742 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2267.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2267.java
@@ -6,7 +6,7 @@ import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2267 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2271.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2271.java
index fb281f22b2..91fb51034b 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2271.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2271.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.ui.AbstractOrderedLayout;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.ComboBox;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket2271 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2282.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2282.java
index c72b4e15ff..976b06fe32 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2282.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2282.java
@@ -5,7 +5,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.FormLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2282 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2283.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2283.java
index 8375ca648f..5576e48fba 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2283.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2283.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.ui.Alignment;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2283 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2287.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2287.java
index 716c8af0db..59fc174215 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2287.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2287.java
@@ -4,7 +4,7 @@ import java.net.URL;
 
 import com.vaadin.shared.ui.label.ContentMode;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2287 extends Ticket2292 {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2289.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2289.java
index 0ad023450c..c715fafd74 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2289.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2289.java
@@ -7,7 +7,7 @@ import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.CustomComponent;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TabSheet;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2292.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2292.java
index 35e9b8f2c5..e732ea09e0 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2292.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2292.java
@@ -19,7 +19,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.CheckBox;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Link;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2292 extends com.vaadin.Application.LegacyApplication
         implements RequestHandler {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2294.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2294.java
index 30392a245d..053534191b 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2294.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2294.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.ui.AbstractOrderedLayout;
 import com.vaadin.ui.Alignment;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2294 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2296.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2296.java
index 31ff4a8353..d059b96953 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2296.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2296.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.CustomLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2296 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2297.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2297.java
index 1d1f0f1d74..073126ae07 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2297.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2297.java
@@ -6,7 +6,7 @@ import java.net.URL;
 
 import com.vaadin.ui.CustomLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2297 extends Ticket2292 {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2303.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2303.java
index bc11a7ea49..fb1c5440ad 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2303.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2303.java
@@ -6,7 +6,7 @@ import java.io.IOException;
 import com.vaadin.Application;
 import com.vaadin.ui.CustomLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket2303 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2304.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2304.java
index b767b3661f..ccef7a9a92 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2304.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2304.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.shared.ui.label.ContentMode;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.themes.Reindeer;
 
 public class Ticket2304 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2310.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2310.java
index 1cad5bde4f..24fbd7a968 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2310.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2310.java
@@ -5,7 +5,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.themes.Reindeer;
 
 public class Ticket2310 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2319.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2319.java
index ec6d3be801..438d2ff286 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2319.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2319.java
@@ -6,7 +6,7 @@ import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.HorizontalSplitPanel;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 import com.vaadin.ui.VerticalSplitPanel;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2323.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2323.java
index 123c154e61..d7b8db86bd 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2323.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2323.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.tickets;
 
 import com.vaadin.Application;
 import com.vaadin.ui.RichTextArea;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Window;
 
 public class Ticket2323 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2325.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2325.java
index c253eb70e6..ecc897d4ba 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2325.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2325.java
@@ -1,7 +1,7 @@
 package com.vaadin.tests.tickets;
 
 import com.vaadin.Application;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextArea;
 import com.vaadin.ui.VerticalLayout;
 import com.vaadin.ui.Window;
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2329.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2329.java
index f583a4af4b..2ce42376f9 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2329.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2329.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Component;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.Table.ColumnGenerator;
 import com.vaadin.ui.VerticalLayout;
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2337.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2337.java
index f0cae1a59f..3ac381b2d1 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2337.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2337.java
@@ -5,7 +5,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2337 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2339.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2339.java
index 81dc3af40f..ce884bada7 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2339.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2339.java
@@ -6,7 +6,7 @@ import java.io.IOException;
 import com.vaadin.Application;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.CustomLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2339 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2341.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2341.java
index a35c27962f..aa2eefcb7e 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2341.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2341.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.data.Item;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Layout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 
 public class Ticket2341 extends com.vaadin.Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2344.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2344.java
index d7b1eacd2c..befad78a73 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2344.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2344.java
@@ -4,7 +4,7 @@ import java.util.Random;
 
 import com.vaadin.Application;
 import com.vaadin.ui.Button;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.VerticalLayout;
 import com.vaadin.ui.themes.BaseTheme;
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2347.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2347.java
index 5528dfebd6..582b9a95ee 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2347.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2347.java
@@ -5,7 +5,7 @@ import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
 import com.vaadin.ui.CustomLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket2347 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2364.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2364.java
index 8039609339..f7d6f61110 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2364.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2364.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.tickets;
 
 import com.vaadin.Application;
 import com.vaadin.ui.Form;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Select;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2365.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2365.java
index 252406cc2d..b191901356 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2365.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2365.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 
 public class Ticket2365 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2398.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2398.java
index 054cc5f0cc..f5b68800e6 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2398.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2398.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.data.util.IndexedContainer;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 
 public class Ticket2398 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2404.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2404.java
index 0da70301d1..30f9d04d3b 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2404.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2404.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.GridLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2404 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2405.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2405.java
index c5ef9ec0b0..a76f3a711f 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2405.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2405.java
@@ -9,7 +9,7 @@ import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.HorizontalSplitPanel;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Layout.MarginHandler;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2406.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2406.java
index 0036bdc7b2..dd42727591 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2406.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2406.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Button.ClickListener;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 import com.vaadin.ui.Window;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2407.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2407.java
index 51ab08188e..df2ae47acd 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2407.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2407.java
@@ -1,7 +1,7 @@
 package com.vaadin.tests.tickets;
 
 import com.vaadin.ui.Form;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2411.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2411.java
index 6801bfa88d..2c59493e0c 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2411.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2411.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.GridLayout;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2411 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2415.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2415.java
index 509f4cf437..f52c1b1ccc 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2415.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2415.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.data.Property;
 import com.vaadin.data.Property.ValueChangeEvent;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 public class Ticket2415 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2420.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2420.java
index adca729c9e..5d15107053 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2420.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2420.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.tickets;
 
 import com.vaadin.Application;
 import com.vaadin.ui.ProgressIndicator;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2420 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2425.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2425.java
index 8c9be295a0..140fa6f2b6 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2425.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2425.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TabSheet;
 
 public class Ticket2425 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2426.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2426.java
index 40862e3ccd..fee74b73f7 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2426.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2426.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.shared.ui.label.ContentMode;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2426 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2431.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2431.java
index f6e6c1e7b5..cb9eb449bf 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2431.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2431.java
@@ -7,7 +7,7 @@ import com.vaadin.event.ShortcutAction;
 import com.vaadin.event.ShortcutAction.KeyCode;
 import com.vaadin.event.ShortcutAction.ModifierKey;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2431 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2432.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2432.java
index 2716038873..f21e6a6752 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2432.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2432.java
@@ -8,7 +8,7 @@ import com.vaadin.ui.Label;
 import com.vaadin.ui.Layout;
 import com.vaadin.ui.Layout.AlignmentHandler;
 import com.vaadin.ui.Layout.SpacingHandler;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2432 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2434.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2434.java
index 79e383393f..6401a98763 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2434.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2434.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.tickets;
 
 import com.vaadin.Application;
 import com.vaadin.tests.TestForTablesInitialColumnWidthLogicRendering;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 
 public class Ticket2434 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2436.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2436.java
index f48cf7a79a..5367c24b01 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2436.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2436.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Component;
 import com.vaadin.ui.PopupView;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket2436 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2526.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2526.java
index 97d096405e..998fe75f8c 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2526.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2526.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Window;
 
 public class Ticket2526 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2742.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2742.java
index 1003ea1c66..733f6ac6f6 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2742.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2742.java
@@ -6,7 +6,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.NativeSelect;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 /**
  * @author Risto Yrjänä / Vaadin Ltd.
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2901.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2901.java
index ab808501f7..c4352abefe 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2901.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2901.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.tickets;
 
 import com.vaadin.Application;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.VerticalLayout;
 import com.vaadin.ui.VerticalSplitPanel;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket2998.java b/tests/testbench/com/vaadin/tests/tickets/Ticket2998.java
index 2d2970d36e..0cd43533fd 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket2998.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket2998.java
@@ -23,7 +23,7 @@ import com.vaadin.ui.Layout.MarginHandler;
 import com.vaadin.ui.ListSelect;
 import com.vaadin.ui.Notification;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket3146.java b/tests/testbench/com/vaadin/tests/tickets/Ticket3146.java
index b6e01d912f..7973ffa496 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket3146.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket3146.java
@@ -6,7 +6,7 @@ import java.util.HashSet;
 import com.vaadin.Application;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.TextField;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket34.java b/tests/testbench/com/vaadin/tests/tickets/Ticket34.java
index e3b90c94b0..67db77a5af 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket34.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket34.java
@@ -11,7 +11,7 @@ import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Component;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
 
@@ -95,7 +95,7 @@ public class Ticket34 extends Application.LegacyApplication {
                 public void buttonClick(ClickEvent event) {
                     String viewName = tf.getValue().toString();
                     // fragmentChangedListener will change the view if possible
-                    event.getButton().getRoot().getPage().setFragment(viewName);
+                    event.getButton().getUI().getPage().setFragment(viewName);
                 }
             });
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket5053.java b/tests/testbench/com/vaadin/tests/tickets/Ticket5053.java
index 35f244e07f..6f8ade15c4 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket5053.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket5053.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.tickets;
 
 import com.vaadin.Application;
 import com.vaadin.ui.ComboBox;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 /**
  * #5053: Last ComboBox item may not be shown if null selection enabled
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket5157.java b/tests/testbench/com/vaadin/tests/tickets/Ticket5157.java
index 5902382d01..3102a0a56c 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket5157.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket5157.java
@@ -5,7 +5,7 @@ import com.vaadin.event.ShortcutAction.KeyCode;
 import com.vaadin.event.ShortcutListener;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 /**
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket5952.java b/tests/testbench/com/vaadin/tests/tickets/Ticket5952.java
index b7caa08b82..92cd0290d6 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket5952.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket5952.java
@@ -3,7 +3,7 @@ package com.vaadin.tests.tickets;
 import com.vaadin.Application;
 import com.vaadin.shared.ui.label.ContentMode;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket5952 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket6002.java b/tests/testbench/com/vaadin/tests/tickets/Ticket6002.java
index fef7061516..887652aee7 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket6002.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket6002.java
@@ -5,7 +5,7 @@ import com.vaadin.data.Property.ValueChangeEvent;
 import com.vaadin.data.util.ObjectProperty;
 import com.vaadin.tests.components.TestBase;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket677.java b/tests/testbench/com/vaadin/tests/tickets/Ticket677.java
index ca55b8648c..1c66f67ca1 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket677.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket677.java
@@ -17,7 +17,7 @@ import com.vaadin.ui.GridLayout;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.Table;
 import com.vaadin.ui.TextField;
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket695.java b/tests/testbench/com/vaadin/tests/tickets/Ticket695.java
index c62cee038c..e539f999b3 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket695.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket695.java
@@ -7,7 +7,7 @@ import java.io.ObjectOutputStream;
 import com.vaadin.Application;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 @SuppressWarnings("serial")
 public class Ticket695 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket736.java b/tests/testbench/com/vaadin/tests/tickets/Ticket736.java
index d871c8adc4..1176e87bb4 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket736.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket736.java
@@ -15,7 +15,7 @@ import com.vaadin.ui.CheckBox;
 import com.vaadin.ui.Form;
 import com.vaadin.ui.HorizontalLayout;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 
 public class Ticket736 extends Application.LegacyApplication {
 
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket8291.java b/tests/testbench/com/vaadin/tests/tickets/Ticket8291.java
index 2f094f0bf8..24a98d42e3 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket8291.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket8291.java
@@ -11,14 +11,14 @@ import com.vaadin.terminal.WrappedRequest;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.HorizontalLayout;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 import com.vaadin.ui.Table;
 
 /**
  * Test for #8291 and #7666: NegativeArraySizeException when Table scrolled to
  * the end and its size reduced.
  */
-public class Ticket8291 extends Root {
+public class Ticket8291 extends UI {
 
     @Override
     public void init(WrappedRequest request) {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket846.java b/tests/testbench/com/vaadin/tests/tickets/Ticket846.java
index 413d823d2d..407663c6c6 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket846.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket846.java
@@ -5,7 +5,7 @@ import com.vaadin.data.util.MethodProperty;
 import com.vaadin.data.validator.IntegerValidator;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.CheckBox;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 
 public class Ticket846 extends Application.LegacyApplication {
diff --git a/tests/testbench/com/vaadin/tests/tickets/Ticket932.java b/tests/testbench/com/vaadin/tests/tickets/Ticket932.java
index f72ff8beec..c12e2fcad3 100644
--- a/tests/testbench/com/vaadin/tests/tickets/Ticket932.java
+++ b/tests/testbench/com/vaadin/tests/tickets/Ticket932.java
@@ -4,7 +4,7 @@ import com.vaadin.Application;
 import com.vaadin.ui.Button;
 import com.vaadin.ui.Button.ClickEvent;
 import com.vaadin.ui.Label;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextArea;
 import com.vaadin.ui.TextField;
 
diff --git a/tests/testbench/com/vaadin/tests/util/SampleDirectory.java b/tests/testbench/com/vaadin/tests/util/SampleDirectory.java
index 8f3f85a075..788415d0fd 100644
--- a/tests/testbench/com/vaadin/tests/util/SampleDirectory.java
+++ b/tests/testbench/com/vaadin/tests/util/SampleDirectory.java
@@ -23,7 +23,7 @@ import com.vaadin.shared.ui.label.ContentMode;
 import com.vaadin.terminal.SystemError;
 import com.vaadin.ui.Label;
 import com.vaadin.ui.Panel;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
 /**
  * Provides sample directory based on application directory. If this fails then
@@ -41,7 +41,7 @@ public class SampleDirectory {
      * @param application
      * @return file pointing to sample directory
      */
-    public static File getDirectory(Application application, Root root) {
+    public static File getDirectory(Application application, UI uI) {
         String errorMessage = "Access to application "
                 + "context base directory failed, "
                 + "possible security constraint with Application "
@@ -79,9 +79,9 @@ public class SampleDirectory {
                 "Cannot provide sample directory"));
         errorPanel.addComponent(new Label(errorMessage, ContentMode.XHTML));
         // Remove all components from applications main window
-        root.getContent().removeAllComponents();
+        uI.getContent().removeAllComponents();
         // Add error panel
-        root.getContent().addComponent(errorPanel);
+        uI.getContent().addComponent(errorPanel);
         return null;
     }
 }
diff --git a/tests/testbench/com/vaadin/tests/util/TestUtils.java b/tests/testbench/com/vaadin/tests/util/TestUtils.java
index a9e1518c54..62f2cc0be3 100644
--- a/tests/testbench/com/vaadin/tests/util/TestUtils.java
+++ b/tests/testbench/com/vaadin/tests/util/TestUtils.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.util;
 
 import com.vaadin.data.Item;
 import com.vaadin.data.util.IndexedContainer;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
 public class TestUtils {
 
@@ -102,7 +102,7 @@ public class TestUtils {
      * 
      * @param cssString
      */
-    public static void injectCSS(Root w, String cssString) {
+    public static void injectCSS(UI w, String cssString) {
         String script = "if ('\\v'=='v') /* ie only */ {\n"
                 + "        document.createStyleSheet().cssText = '"
                 + cssString
diff --git a/tests/testbench/com/vaadin/tests/vaadincontext/BootstrapModify.html b/tests/testbench/com/vaadin/tests/vaadincontext/BootstrapModifyUI.html
index 8888f95d15..e6fafb14fa 100644
--- a/tests/testbench/com/vaadin/tests/vaadincontext/BootstrapModify.html
+++ b/tests/testbench/com/vaadin/tests/vaadincontext/BootstrapModifyUI.html
@@ -13,13 +13,13 @@
 </thead><tbody>
 <tr>
 	<td>open</td>
-	<td>/run/com.vaadin.tests.vaadincontext.BootstrapModifyRoot?restartApplication</td>
+	<td>/run/com.vaadin.tests.vaadincontext.BootstrapModifyUI?restartApplication</td>
 	<td></td>
 </tr>
 <tr>
 	<td>assertText</td>
-	<td>vaadin=runcomvaadintestsvaadincontextBootstrapModifyRoot::/VVerticalLayout[0]/VLabel[0]</td>
-	<td>There should be two additional divs in the HTML of the bootstrap page for this Root</td>
+	<td>vaadin=runcomvaadintestsvaadincontextBootstrapModifyUI::/VVerticalLayout[0]/VLabel[0]</td>
+	<td>There should be two additional divs in the HTML of the bootstrap page for this UI</td>
 </tr>
 <tr>
 	<td>assertText</td>
diff --git a/tests/testbench/com/vaadin/tests/vaadincontext/BootstrapModifyRoot.java b/tests/testbench/com/vaadin/tests/vaadincontext/BootstrapModifyUI.java
index 6c17c3005e..c197bbde5d 100644
--- a/tests/testbench/com/vaadin/tests/vaadincontext/BootstrapModifyRoot.java
+++ b/tests/testbench/com/vaadin/tests/vaadincontext/BootstrapModifyUI.java
@@ -17,9 +17,9 @@
 package com.vaadin.tests.vaadincontext;
 
 import com.vaadin.terminal.WrappedRequest;
-import com.vaadin.tests.components.AbstractTestRoot;
+import com.vaadin.tests.components.AbstractTestUI;
 
-public class BootstrapModifyRoot extends AbstractTestRoot {
+public class BootstrapModifyUI extends AbstractTestUI {
 
     @Override
     protected void setup(WrappedRequest request) {
@@ -29,7 +29,7 @@ public class BootstrapModifyRoot extends AbstractTestRoot {
 
     @Override
     protected String getTestDescription() {
-        return "There should be two additional divs in the HTML of the bootstrap page for this Root";
+        return "There should be two additional divs in the HTML of the bootstrap page for this UI";
     }
 
     @Override
diff --git a/tests/testbench/com/vaadin/tests/vaadincontext/TestAddonContextListener.java b/tests/testbench/com/vaadin/tests/vaadincontext/TestAddonContextListener.java
index da058892b4..9cd67e24b6 100644
--- a/tests/testbench/com/vaadin/tests/vaadincontext/TestAddonContextListener.java
+++ b/tests/testbench/com/vaadin/tests/vaadincontext/TestAddonContextListener.java
@@ -25,7 +25,7 @@ import com.vaadin.terminal.gwt.server.BootstrapPageResponse;
 import com.vaadin.terminal.gwt.server.BootstrapResponse;
 import com.vaadin.terminal.gwt.server.AddonContextEvent;
 import com.vaadin.terminal.gwt.server.AddonContextListener;
-import com.vaadin.ui.Root;
+import com.vaadin.ui.UI;
 
 public class TestAddonContextListener implements AddonContextListener {
     @Override
@@ -42,9 +42,9 @@ public class TestAddonContextListener implements AddonContextListener {
             }
 
             private boolean shouldModify(BootstrapResponse response) {
-                Root root = response.getRoot();
-                boolean shouldModify = root != null
-                        && root.getClass() == BootstrapModifyRoot.class;
+                UI uI = response.getUI();
+                boolean shouldModify = uI != null
+                        && uI.getClass() == BootstrapModifyUI.class;
                 return shouldModify;
             }
 
diff --git a/tests/testbench/com/vaadin/tests/validation/RequiredErrorMessage.java b/tests/testbench/com/vaadin/tests/validation/RequiredErrorMessage.java
index 7b03bc7ec2..b63527ad60 100644
--- a/tests/testbench/com/vaadin/tests/validation/RequiredErrorMessage.java
+++ b/tests/testbench/com/vaadin/tests/validation/RequiredErrorMessage.java
@@ -2,7 +2,7 @@ package com.vaadin.tests.validation;
 
 import com.vaadin.tests.components.AbstractTestCase;
 import com.vaadin.ui.Form;
-import com.vaadin.ui.Root.LegacyWindow;
+import com.vaadin.ui.UI.LegacyWindow;
 import com.vaadin.ui.TextField;
 import com.vaadin.ui.VerticalLayout;
 
diff --git a/tests/testbench/com/vaadin/tests/widgetset/TestingWidgetSet.java b/tests/testbench/com/vaadin/tests/widgetset/TestingWidgetSet.java
new file mode 100644
index 0000000000..0464a53a95
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/widgetset/TestingWidgetSet.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright 2011 Vaadin Ltd.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.vaadin.tests.widgetset;
+
+public class TestingWidgetSet {
+    public static final String NAME = "com.vaadin.tests.widgetset.TestingWidgetSet";
+}
diff --git a/tests/testbench/com/vaadin/tests/widgetset/client/DelegateConnector.java b/tests/testbench/com/vaadin/tests/widgetset/client/DelegateConnector.java
new file mode 100644
index 0000000000..c711be232f
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/widgetset/client/DelegateConnector.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2011 Vaadin Ltd.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.vaadin.tests.widgetset.client;
+
+import com.vaadin.shared.ui.Connect;
+import com.vaadin.terminal.gwt.client.ui.AbstractComponentConnector;
+import com.vaadin.tests.widgetset.server.DelegateToWidgetComponent;
+
+@Connect(DelegateToWidgetComponent.class)
+public class DelegateConnector extends AbstractComponentConnector {
+    @Override
+    public DelegateWidget getWidget() {
+        return (DelegateWidget) super.getWidget();
+    }
+
+    @Override
+    public DelegateState getState() {
+        return (DelegateState) super.getState();
+    }
+}
diff --git a/tests/testbench/com/vaadin/tests/widgetset/client/DelegateState.java b/tests/testbench/com/vaadin/tests/widgetset/client/DelegateState.java
new file mode 100644
index 0000000000..e9ac8a1e61
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/widgetset/client/DelegateState.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2011 Vaadin Ltd.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.vaadin.tests.widgetset.client;
+
+import com.vaadin.shared.ComponentState;
+import com.vaadin.shared.annotations.DelegateToWidget;
+
+public class DelegateState extends ComponentState {
+    @DelegateToWidget
+    public String value1;
+
+    @DelegateToWidget("setValue2")
+    public int renamedValue2;
+
+    private Boolean value3;
+
+    private double renamedValue4;
+
+    @DelegateToWidget
+    public void setValue3(Boolean value3) {
+        this.value3 = value3;
+    }
+
+    public Boolean getValue3() {
+        return value3;
+    }
+
+    @DelegateToWidget("setValue4")
+    public void setRenamedValue4(double renamedValue4) {
+        this.renamedValue4 = renamedValue4;
+    }
+
+    public double getRenamedValue4() {
+        return renamedValue4;
+    }
+}
diff --git a/tests/testbench/com/vaadin/tests/widgetset/client/DelegateWidget.java b/tests/testbench/com/vaadin/tests/widgetset/client/DelegateWidget.java
new file mode 100644
index 0000000000..4776eced9a
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/widgetset/client/DelegateWidget.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2011 Vaadin Ltd.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.vaadin.tests.widgetset.client;
+
+import com.google.gwt.user.client.ui.HTML;
+
+public class DelegateWidget extends HTML {
+    private String value1;
+    private int value2;
+    private Boolean value3;
+    private double value4;
+
+    public void setValue1(String value1) {
+        this.value1 = value1;
+        updateText();
+    }
+
+    public void setValue2(int value2) {
+        this.value2 = value2;
+        updateText();
+    }
+
+    public void setValue3(Boolean value3) {
+        this.value3 = value3;
+        updateText();
+    }
+
+    public void setValue4(double value4) {
+        this.value4 = value4;
+    }
+
+    private void updateText() {
+        setHTML(value1 + "<br />" + value2 + "<br />" + value3 + "<br />"
+                + value4 + "<br />");
+    }
+}
diff --git a/tests/testbench/com/vaadin/tests/widgetset/server/DelegateToWidgetComponent.java b/tests/testbench/com/vaadin/tests/widgetset/server/DelegateToWidgetComponent.java
new file mode 100644
index 0000000000..34c9699f7f
--- /dev/null
+++ b/tests/testbench/com/vaadin/tests/widgetset/server/DelegateToWidgetComponent.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2011 Vaadin Ltd.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package com.vaadin.tests.widgetset.server;
+
+import com.vaadin.tests.widgetset.client.DelegateState;
+import com.vaadin.ui.AbstractComponent;
+
+public class DelegateToWidgetComponent extends AbstractComponent {
+    public DelegateToWidgetComponent() {
+        DelegateState state = getState();
+        state.value1 = "My String";
+        state.renamedValue2 = 42;
+        state.setValue3(Boolean.TRUE);
+        state.setRenamedValue4(Math.PI);
+    }
+
+    @Override
+    protected DelegateState getState() {
+        return (DelegateState) super.getState();
+    }
+}