Well, the idea is that your test suite should cover ALL code you have, so you don't have to check all your functions. Devel::Cover helps you by clearly marking

Well, the idea is that your test suite should cover ALL code you have, so you don't have to check all your functions. Devel::Cover helps you by clearly marking code your tests don't run in red, so you know where you need to add tests and don't need to go through manually.