There is always something, innit? Some "data scientist" in waaaaaay over his head complained to my teammate that the piece of code she wrote was faulty in some overly weird edge case that only occurred to him, but was never actually seen in practice. But the jerk complained in a very, very annoying and entitled and pushy way.
He brought my girl almost to tears.
Now, im not exactly the most delicate in my manners, but One. Doesn't. Mess. With. My. Team.
I just sent an email to his manager that from this day forward, every single piece of code anyone on his entire team requests will be tested to the entirety of the possible inputs. They had asked for some delay measurement tool. I've locked my cluster for... nineteen hours now, just computing the complete list of test parameters. 3.1Gb of parquet files with possible input combinations. Or about 1200 USD coming out of their budget *just to _test_ this one fucking function*. And about a week delays for the tests to complete.
And a chip on my shoulder.

P.S. the data science team manager is actually nice and all, and he is also at the end of his patience with his jerk of a teammate. Someone is getting a bloody poor quarterly review.