Not sure why this was downvoted. I'm currently still in Python2 and looking to upgrade to Python3. Having solid automated tests is vital for us to do it confidently.
But do you have tests for your tests? Assuming tests are written in Python2, gotta make sure they don't start testing the wrong things when you upgrade them...
The way I think of it, the code tests the tests. It's the the same way keys and locks verify each other.
Is there some sort of failure mode you're thinking of where I'd still see all the tests run but the test framework would give false success for something?
