Code coverage should be easy. if it's costing time, you're doing it wrong. if you're trying to apply it to an old project that did not use code coverage from the start: This is one way to do it wrong. you couldn't hold a gun to my head and make me do that. you can have a little bit of code coverage in this case, but not 85% - no. The moment it proves that it will be costing more time than it saves is the moment you can count me out.