Index: /CKEditor/tests/dt/core/_editor/custom_config_1.js
===================================================================
--- /CKEditor/tests/dt/core/_editor/custom_config_1.js	(revision 4739)
+++ /CKEditor/tests/dt/core/_editor/custom_config_1.js	(revision 4740)
@@ -6,5 +6,5 @@
 CKEDITOR.editorConfig = function( config )
 {
-	config.customConfig = '_editor/custom_config_2.js';
+	config.customConfig = CKTESTER.cell.getAbsolutePath( '_editor/custom_config_2.js' );
 	config.test_custom1 = 'Ok';
 };
Index: /CKEditor/tests/dt/core/editor.html
===================================================================
--- /CKEditor/tests/dt/core/editor.html	(revision 4739)
+++ /CKEditor/tests/dt/core/editor.html	(revision 4740)
@@ -17,4 +17,5 @@
 
 	return {
+		shouldIgnoreAllBut : [ 'test_config_customConfig' ],
 		test_name : function()
 		{
@@ -103,5 +104,5 @@
 
 			// Pass in-page settings to the instance.
-			CKEDITOR.replace( 'editor3', { customConfig : '_editor/custom_config_1.js', test1 : 'ball', baseHref : 'test' } );
+			CKEDITOR.replace( 'editor3', { customConfig : CKTESTER.cell.getAbsolutePath( '_editor/custom_config_1.js' ), test1 : 'ball', baseHref : 'test' } );
 
 			this.wait();