One of the best experiences you might have as a developer is when you are running your continuous delivery pipeline and one of the test failed because it has found a bug. At this point you see that thanks of your tests you are producing a less buggy software. This should be the normal case, in green field projects, but unlikely to happen when running legacy code with a lot of untested code.
Come to this session to learn how you can use Docker for developing tests for code that never had any automatic test before