tl;dr:The goal of testing code is: (1) Document what the code should do. (2) Assert that it does it. It’s common to find tests that do the 2nd but neglect the 1st. Alex discusses common problems and his testing strategy.
tl;dr:When your reports are complaining that nobody can do code reviews or seem increasingly stressed in standups, these are signs that your team may be doing too much. "You’re stuck in a trap, and thrashing won’t get you out. You can escape by stopping your current approach, and doing something new. You’re going to deliberately overshoot, cutting down WIP, and then maintaining a healthy amount going forward."