Since it was created 10 years ago by Linus Torvalds, Git has become by far the most popular version Control system in the Open Source world, and more and more companies are using it. One of the reason Git has been so successful is that it has been very stable and solid, so its users have been able to Trust it and to rely on it starting from its very beginning. This has been possible because Git developers have put a lot of attention to testing. They have developed great testing commands like "git bisect" and a great reusable test framework called Sharness. In this presentation Christian Couder will use examples from the development of IPFS, a new hypermedia protocol, and Git itself to show how to take advantage of all the test related features and techniques that Git provides and develops.