The readme says:

> With pytest, it's possible to organize tests in a similar way with classes. However, I think classes are awkward. I don't think the convention of using camel-case names for classes fit very well when testing functions in different cases. In addition, every test function must take a "self" argument that is never used.

So there's no reason to do this, aside from aesthetics.

I'd recommend against doing un-Pythonic stuff like this, it makes your code harder to pick up for new engineers.