With the JS console open: Open the login page Confirm that there was no warning that moodle-core-notification has been deprecated Click on the help dialogue Confirm it appears as expected Edit help_ajax.php and throw a new moodle_exception somewhere before the json_encode is output Refresh the page Click the help icon again Confirm that the exception dialogue is shown Confirm non warning about moodle-core-notification being deprecated in the console Edit help_ajax.php again and remove the exception. Add an echo with some random content instead. Click the help icon again Confirm that the exception dialogue is shown Confirm non warning about moodle-core-notification being deprecated in the console