diff --git a/tests/plugins/colorbutton/manual/custompanelrender.html b/tests/plugins/colorbutton/manual/custompanelrender.html
index 15b2faeaeb2..856495ec447 100644
--- a/tests/plugins/colorbutton/manual/custompanelrender.html
+++ b/tests/plugins/colorbutton/manual/custompanelrender.html
@@ -2,7 +2,7 @@
 
 <script>
 	CKEDITOR.replace( 'editor', {
-        language: 'pl',
+		language: 'pl',
 		colorButton_colors: 'text-red/F00,text-blue/00F'
 	} );
 </script>