You also have to be a bit careful:

“Fix the issues causing these warnings”

Retrospectively fixing a test to be passing given the current code is a complex task, instead, you can ask it to write a test that tests the intended behaviour, without needing to infer it.

“The argument passed is now wrong” - you’re asking the LLM to infer that there’s a problem somewhere else, and to find and fix it.

When you’re asking an LLM to do something, you have to be very explicit about what you want it to do.