Untested tests are still a lot more useful than no tests, just like how an untested program (while probably worse than a tested program) is still usually better

Untested tests are still a lot more useful than no tests, just like how an untested program (while probably worse than a tested program) is still usually better than no program at all. Also, tests are actually subject to very basic testing in the red-green-refactor TDD cycle: they start out failing so you know that they actually test something when they start passing.