Index: tests/qunit/fixtures/customize-settings.js
===================================================================
--- tests/qunit/fixtures/customize-settings.js	(revision 37361)
+++ tests/qunit/fixtures/customize-settings.js	(working copy)
@@ -3,7 +3,7 @@
 
 var customizerRootElement;
 customizerRootElement = jQuery( '<div id="customize-theme-controls"><ul></ul></div>' );
-customizerRootElement.css( { position: 'absolute', left: -10000, top: -10000 } ); // Remove from view.
+customizerRootElement.css( { position: 'absolute', top: -1000 } ); // Remove from view.
 jQuery( document.body ).append( customizerRootElement );
 
 window._wpCustomizeSettings = {
Index: tests/qunit/wp-admin/js/customize-controls.js
===================================================================
--- tests/qunit/wp-admin/js/customize-controls.js	(revision 37361)
+++ tests/qunit/wp-admin/js/customize-controls.js	(working copy)
@@ -219,6 +219,9 @@
 		control.focus();
 		ok( section.expanded() );
 		ok( panel.expanded() );
+
+		// Clean up at the end of the module.
+		panel.container.remove();
 	} );
 
 	module( 'Customizer Default Panel with Template in Fixture' );
@@ -437,5 +440,8 @@
 
 	test( 'Panel instance is not contextuallyActive', function () {
 		equal( mockPanel.isContextuallyActive(), false );
+
+		// Clean up at the end of the module.
+		mockPanel.container.remove();
 	});
 });
Index: tests/qunit/wp-admin/js/customize-nav-menus.js
===================================================================
--- tests/qunit/wp-admin/js/customize-nav-menus.js	(revision 37361)
+++ tests/qunit/wp-admin/js/customize-nav-menus.js	(working copy)
@@ -123,6 +123,9 @@
 		var control = api.Menus.getMenuItemControl( 2000 );
 		ok( !! control, 'control is returned' );
 		ok( control.extended( api.Menus.MenuItemControl ), 'control is a MenuItemControl' );
+
+		// Clean up at the end of the module.
+		api.panel( 'nav_menus' ).container.remove();
 	} );
 
 } );
Index: tests/qunit/wp-admin/js/customize-widgets.js
===================================================================
--- tests/qunit/wp-admin/js/customize-widgets.js	(revision 37361)
+++ tests/qunit/wp-admin/js/customize-widgets.js	(working copy)
@@ -67,5 +67,8 @@
 		} );
 
 		expect( 4 );
+
+		// Clean up at the end of the module.
+		panel.container.remove();
 	});
 });