Alas, not many places currently use moodle-core-notification (this will be changed in time) so you'll have to do some fudging I'm afraid. edit /enrol/manual/ajax.php add a die(); line somewhere early on open a course, and browse to the list of enrolled users click the 'Enrol users' button A Syntax Error box should appear Confirm that the 'X' is highlighted Inspect the X and confirm that it is an anchor click the X with the mouse Confirm that the syntax error warning was closed Refresh and re-open the 'Enrol users' box Ensure that the X is highlighted, and press the Return key on the keyboard Confirm that the syntax error warning was closed Alternatively, check out the new popup help ( MDL-35819 ) and open a help box and confirm that it works as expected there instead