I feel like I've never seen a project that I liked, where I surprisingly discovered it was developed using TDD. I have seen only a handful of projects, show as

I feel like I've never seen a project that I liked, where I surprisingly discovered it was developed using TDD. I have seen only a handful of projects, show as examples of TDD, that actually were projects I liked. Its a variation of the "don't worry they'll tell you" joke. How do you know a project was TDD?