There are several ways to make sure you don't miss the due date of a pattern you are testing. Keep an open line of communication with the designer so they can remind you about the due date. We automatically send a reminder for upcoming due dates on tests you have not completed yet, as long as the designer set a due date in their Shop manager. You can also sort patterns by due date on the 'testing' tab in your patterns library. If the designer set a due date, a 'Due in X days' note will appear next to each pattern you are testing.