You know the situation. You come to a new project that you should upgrade and refactor. It has some tests that ~~you~~ long-term developer can run locally. But the automated CI that runs tests on every commit is missing. Shall we start refactoring and adding CI tools like PHPStan or ECS? **How about using what is already there**? The tests. But the tests require this PHP extension, those environment variables, this external service, and these few Docker images to be running. What if we can **...
