Students in Mrs. Middleton's third grade class are working on times tables, and they demonstrate mastery by passing tests. Julie has passed 1 test so far. Her classmate, Erik, has passed 5 of them. From now on, Julie plans to take and pass 3 tests per week. Meanwhile, Erik plans to do 1 per week. At some point, Julie will catch up to Erik. How many tests will each child have passed?