Mine

        def respond(ign):
            d = self.assertResponse((root, 'http://localhost/',
                                     {'authorization': authRequest}),
                                    (200,
                                     {},
                                     None))
            return d
vs.
        def respond(ign):
            d = self.assertResponse(
                (root, 'http://localhost/', {'authorization': authRequest}),
                (200, {}, None)
            )
            return d