I know the rules cold, so I ran a test this morning.
UAV Coach (link below)06:34:00 - hit start button to start test
06:38:28 - test complete, certificate in hand
4 minutes and 28 seconds start to finish.
Or, you can use the AMA's crappy site where it's not only slow, but crashes too!
https://uavcoach.com/faa-recreational-drone-training/