There actually is a way to test your test suite: mutation tests [1]. Basically, you change the covered codebase (invert an if statement, change a variable, etc.

There actually is a way to test your test suite: mutation tests [1]. Basically, you change the covered codebase (invert an if statement, change a variable, etc.) and expect the tests to then fail. If the tests actually survive the mutations, they might not be good enough. [1] https://en.wikipedia.org/wiki/Mutation_testing https://en.wikipedia.org/wiki/Mutation_testing