One failing test in "test_coroutines": test_func_5. The reason is that the GeneratorWrapper is not iterable (and there is no reason it shouldn't be, given that it wraps a Generator). That was my fault, I had already added an __iter__ method but didn't copy it in my previous message. Adding it as follows fixes the test for me:

    def __iter__(self):
        return self.__wrapped__

Alternatively, "__iter__ = __await__" would do the same.