Mocker decorators not recognisable by pytest

[Volans]

When running the following code with pytest, it passes on Python 2.7 but both tests fail on Python 3.6 with the message "E fixture 'mocked_obj' not found":

#------
import requests_mock

@requests_mock.Mocker()
def test_foo(mocked_obj):
    pass

@requests_mock.Mocker()
class TestFoo(object):

    def test_foo(self, mocked_obj):
        pass
#------

I've already opened an issue on Pytest side but according to pytest folks it's not possible to recognise the 'mocked_obj' parameter as the one already passed by the decorator because of missing metadata, hence pytest looks for a fixture with that name and fail.

See the pytest issue on GitHub for additional information on the test environments and the related discussion:

https://github.com/pytest-dev/pytest/issues/2749