ValueError: parameter 'xxxx' not found in test function signature 'TestClass()

[smarie]

Using @parametrize on a class does not work as usual pytest:

@parametrize(foo=("bar",))
class TestFoo:
    def test_foo(self, foo):
        pass

raises a ValueError

[smarie]

Note that on python 2 this raises ValueError: callable <class TestFoo at 0x0000000005725708> is not supported by signature