Test 1 Create a course Create a manual course event for the month of June Create an assign activity and set a "due date" for month of June Create multiple groups in the course (Say A and B) Set group override for a user for a group (say A) for July Enrol 2 users in each group A and B)(Students A1, A2 and B1, B2) For one of the student of group (A1) set user override for the month of Aug Verify you see the following events - As A1 Manual event in June Assign event in Aug As A2 Manual event in June Assign event in July As B1 Manual event in June Assign event in June Enable completion in course Create a page activity and set "Expect to be completed on " to a date in November Back up the course. Download the backup file and rename it with tgz extension Open the archive and go to activities/assign/calendar.xml Make sure there are no events in the backup file. Test 2 Restore this course. Make sure no assign events are created in the new course, check db to be sure. Check db table task_adhoc and make sure there is task \core\task\refresh_mod_calendar_events_task in the list Run cron You should see something similar (not exact) in your cron logs Refreshing events for assign Refreshing events for chat Refreshing events for choice Refreshing events for data Refreshing events for feedback Refreshing events for lesson Refreshing completion events for page for course 39 Refreshing events for quiz Refreshing events for scorm Refreshing events for workshop Go to calendar db and make sure there assign events now Reverify point 8 above for this course. (There seems to be a bug that events from all course not just the current course are displayed, if you can reproduce it, please create a 3.3 regression blocker) Reverify the expected completion event was created again. Test 3 Restore the attached course. Check db and make sure only one new event is created. Test 4 Backup and restore a 3.2 backup with calendar events to a 3.3/3.4 site and make sure there are no notices during restore related to this patch.