Comment by bee_rider

It is an edge case… I mean, if people are required to take classes where they already know all the material, somehow a failure has occurred earlier in the process (unfortunately it is a very common failure mode to not be allowed to try and test out of a class).

Realistically I think the more common case is to think you know the material, skip studying, and then faceplant on the test. Homework should help self-correct.

But yeah, I could it being annoying if you really do already know the material.