@bender-tags: 4.17.2, bug, 5004
@bender-ui: collapsed
@bender-ckeditor-plugins: wysiwygarea,toolbar,basicstyles,link,format,sourcearea,elementspath,undo

1. Open a browser console to track possible errors.
2. Wait until the `Trigger test` button will be available.
3. Click the button and watch console.

**Expected:** No errors in the console.

**Unexpected:** Error appears: `Uncaught ReferenceError: CKEDITOR is not defined`.
