With this speech I try to answer the biggest question about TDD: Why should I study QtTest instead of watching my favourite series on Netflix? I don’t have the answer. It is like answer to “Life, Universe and Everything” (I’m sure you know the answer..). But I can tell you what works for me (and why I stop Netflix subscription). Starting from 2 real life example I’m going to show how this tool bring value to me, even if I’m not a full time software developer. I’ll dig into how I structured the project to be more productive and I’ll review how testing is available in Qt. Finally I’ll share my thoughts about TDD that sometimes is considered not just a practice but a religion, investigating pros and cons.