I know I'm writing the correct integration tests when each one I add uncovers a new bug.

Still, it would be nice if just one of them passed first time.

Yeah, I'm still scared of the first time the test suite I designed for work will return without failed cases. Probably the seas will rise and Cthullu allmighty will awake from his eternal slumber but thanks to the "Break with your ass what you just repaired" attitude of our product devs that will probably never happen.