

One of the guys at my old job submitted a PR with tests that basically just mocked everything, tested nothing. Like,
with patch("something.whatever", return_value=True):
assert whatever(0) is True
assert whatever(1) is True
Except for a few dozen lines, with names that made it look like they were doing useful.
He used AI to generate them, of course. Pretty useless.
I used to try to explain to management that some debt is high interest.