Find or create a course with a number of students, where each have a few quiz attempt. Try to aim for a nice number like 10 quiz attempts. Go to the quiz reports, and set the report options to Page size: 2. Verify that the paging bar shows 5 pages, and that the last page contains 2 attempts. (Obviously, you could do similar tests with any number of quiz attempts, if you have used an existing course in your testing.) The above verifies that the code works write now, but can you be sure you were able to reproduce the the problem before the bug fix. I think the problem comes from either users having mulitple enrolments in the course, or possibly users being members of mulitple groups . So, to extend the above testing: Try to get it so that two users have multiple enrolments. E.g. can you create it so that a user has both a self-enrolment and a manual enrolment? (Not sure if the UI allows this. I have certainly seen it with a manual enrolment, and an automated enrolment like database enrolment. You may have to set this up directly in the database.) Before the fix, that woudl have led to the paging bar showing 6 pages (2 extra in the count) but the last page would be empty (really only 10 attempts). Ideally, you would verify that this is really the right way to reproduce the but on last week's Moodle, before using it to test this fix. (Sorry, this is just me - Tim - trying to write best-effort testing instructions, while doing Peer review.)