Index: /CKEditor/trunk/_source/tests/core/editor.html
===================================================================
--- /CKEditor/trunk/_source/tests/core/editor.html	(revision 4028)
+++ /CKEditor/trunk/_source/tests/core/editor.html	(revision 4029)
@@ -10,4 +10,7 @@
 	<script type="text/javascript">
 	//<![CDATA[
+
+// Disable 'scayt' plugin due to it may alter editor config after initialized.
+CKEDITOR.config.removePlugins = 'scayt';
 
 CKEDITOR.test.addTestCase( (function()