5 files changed, 5 insertions, 0 deletions
diff --git a/tests/unit/draggable/core.js b/tests/unit/draggable/core.js
index b5dec8104..9cfbb1853 100644
--- a/tests/unit/draggable/core.js
+++ b/tests/unit/draggable/core.js
@@ -7,6 +7,7 @@ define( [
 	"ui/widgets/droppable",
 	"ui/widgets/resizable"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 QUnit.module( "draggable: core", { afterEach: helper.moduleAfterEach }  );
 
diff --git a/tests/unit/draggable/events.js b/tests/unit/draggable/events.js
index c25754923..97ec912ae 100644
--- a/tests/unit/draggable/events.js
+++ b/tests/unit/draggable/events.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/draggable"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 var element;
 
diff --git a/tests/unit/draggable/helper.js b/tests/unit/draggable/helper.js
index de5dc4a6b..c1920f23b 100644
--- a/tests/unit/draggable/helper.js
+++ b/tests/unit/draggable/helper.js
@@ -4,6 +4,7 @@ define( [
 	"lib/helper",
 	"ui/widgets/draggable"
 ], function( QUnit, $, helper ) {
+"use strict";
 
 return $.extend( helper, {
 
diff --git a/tests/unit/draggable/methods.js b/tests/unit/draggable/methods.js
index 19c7424a0..93f826faf 100644
--- a/tests/unit/draggable/methods.js
+++ b/tests/unit/draggable/methods.js
@@ -5,6 +5,7 @@ define( [
 	"./helper",
 	"ui/widgets/draggable"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 var element;
 
diff --git a/tests/unit/draggable/options.js b/tests/unit/draggable/options.js
index b4f5620d6..499454a65 100644
--- a/tests/unit/draggable/options.js
+++ b/tests/unit/draggable/options.js
@@ -7,6 +7,7 @@ define( [
 	"ui/widgets/droppable",
 	"ui/widgets/sortable"
 ], function( QUnit, $, helper, testHelper ) {
+"use strict";
 
 QUnit.module( "draggable: options", { afterEach: helper.moduleAfterEach }  );