How to Address a Challenge Like This

Some people take the attitude like I'm not going to bother with unit tests. And what are the chances that a big problem will get through those? Maybe it's a good trade off of benefit versus effort. By the way, for context, coverage can tell you which tests ran, which lines of code. But you can also do things like run your integration tests and say, mark all of that coverage as integration. And then every line of code will either say integration or unit or both.