If loop time is a concern, I am surprised the author does not mention tests. Is it still worth it to wait for your test suite to run when an LLM can get it righ

If loop time is a concern, I am surprised the author does not mention tests. Is it still worth it to wait for your test suite to run when an LLM can get it right quick ? Edit: I dont quite buy that argument, in case it was not clear. Edit2: oh, is it specifically about incremental compile time? In which case I understand that tests can be run piece-wise quick indeed.