Lots of unit test do not add value in the traditional sense, but they do help the llm to understand the code.

I notice that the tests are very often for its own benefit. Like, you’ll ask it to stop doing something, literally to just remove code, and it will write a test to verify the behavior is not there.

I can’t imagine a more useless test, but I get that it wants to verify that it actually made the change. I just delete the test when it’s done.