run phpunit --verbose calendar/tests/calendarical_tests.php and make sure it passes A Regression testing with calendar subscriptions is required i.e (add, edit, update, delete etc) Test Goto site>calendar>manage subscription Add an ical subscription using url code} https://www.google.com/calendar/ical/en.australian%23holiday%40group.v.calendar.google.com/public/basic.ics   Not the details in database (event_subscription). Goto the same page again and from the top list of subscription, update the time interval for the one that you just added Check in database pollinterval is updated accordingly