Strong agreement from me. I'd also add "until you've spent some time testing a code base you didn't write" to the mix. That definitely tightens your senses and

Strong agreement from me. I'd also add "until you've spent some time testing a code base you didn't write" to the mix. That definitely tightens your senses and busts some assumptions. The next time you hear the phrase "... well, it worked on my machine ..." it takes on a very different complexion.