Andre writes on his culture of testing:

There’s this line religious people use when they encounter atheists: “Without religion, where do you get your morals from?” Which is hilarious because I responded the other day to someone, “Without tests, where do you get your confidence in the code from?” and then realized what I was sounding like and laughed and laughed—but really I don’t get where the confidence comes from.

My MLKSHK experience told me it's easy to write tests when you're in this habit, which I'm all too often not on my small projects. The price of confidence is constant vigilance.