vaadin-framework/uitest/src/com/vaadin/tests/widgetset/TestingWidgetSet.gwt.xml

<module>
    <!-- WS Compiler: manually edited -->

    <!-- Inherit the DefaultWidgetSet -->
    <inherits name="com.vaadin.DefaultWidgetSet" />

    <replace-with class="com.vaadin.tests.widgetset.client.CustomUIConnector">
        <when-type-is class="com.vaadin.client.ui.ui.UIConnector" />
    </replace-with>

    <replace-with
        class="com.vaadin.tests.widgetset.client.TestingPushConnection">
        <when-type-is class="com.vaadin.client.communication.PushConnection" />
    </replace-with>

</module>