The tests will be made by AI as well, because professors who spend less time on making tests can spend more time on research and get hired/promoted more. For the same reason, professors won't care who is using AI to cheat on the test that was made by AI. Maybe some people will care, but not enough to do anything about it.

(Cheating was already rampant in many classes 20 years ago when I was in college, I can't imagine what it's like now.)