I would add "practice what you preach" to this. Everyone hates the junior developer who says "ugh, this code sucks, it doesn't even have tests." Everyone loves

I would add "practice what you preach" to this. Everyone hates the junior developer who says "ugh, this code sucks, it doesn't even have tests." Everyone loves the junior developer who says "ugh, that code didn't even have tests, so I found a seam and added some tests for the new method I added, here's how to run them."