It's 2022, so practices like Test Driven Development (TDD) have long found their way into organizations. However, the practices and principles to keep those unit tests maintainable haven't really changed. Still, I regularly talk to developers that somehow ended up with an incomprehensible unmaintainable set of unit tests that they once believed in, but are now holding them back. So in this session I like to provide a refresh of those fundamental ideas and talk about why you should practice TDD, revealing intentions, naming conventions, state versus interaction based testing, and how to stay out of the debugger hell with proper mocking and assertion frameworks. And even if you believe you are well versed in the testing realm, join me anyway.