def METHOD_NAME(self, m):
    user = StaffUserFactory.create()
    url = furl(reverse("api:iotypen-list"))
    url.args["registration_backend"] = "objects_api"
    self.client.force_login(user)
    self.install_mocks(m)
    with patch(
        "openforms.registrations.api.filters.ObjectsAPIConfig.get_solo",
        return_value=ObjectsAPIConfig(catalogi_service=self.zgw_group1.ztc_service),
    ):
        response = self.client.get(url.url)
    self.assertEqual(response.status_code, status.HTTP_200_OK)
    data = response.json()
    self.assertEqual(len(data), 2)