lister = <MagicMock name='PyPILister' id='139866878656128'> swh_scheduler_celery_app = <Celery celery.tests at 0x7f355181e128> swh_scheduler_celery_worker = <Worker: gen323@7e4a1d32fc47 (running)> @patch("swh.lister.pypi.tasks.PyPILister") def test_lister(lister, swh_scheduler_celery_app, swh_scheduler_celery_worker): # setup the mocked PypiLister lister.return_value = lister lister.run.return_value = ListerStats(pages=1, origins=70) res = swh_scheduler_celery_app.send_task("swh.lister.pypi.tasks.PyPIListerTask") assert res > res.wait() .tox/py3/lib/python3.7/site-packages/swh/lister/pypi/tests/test_tasks.py:27: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ .tox/py3/lib/python3.7/site-packages/celery/result.py:230: in get on_message=on_message, .tox/py3/lib/python3.7/site-packages/celery/backends/base.py:659: in wait_for_pending return result.maybe_throw(propagate=propagate, callback=callback) .tox/py3/lib/python3.7/site-packages/celery/result.py:335: in maybe_throw self.throw(value, self._to_remote_traceback(tb)) .tox/py3/lib/python3.7/site-packages/celery/result.py:328: in throw self.on_ready.throw(*args, **kwargs) .tox/py3/lib/python3.7/site-packages/vine/promises.py:234: in throw reraise(type(exc), exc, tb) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ tp = <class 'kombu.exceptions.EncodeError'> value = EncodeError("TypeError('Object of type MagicMock is not JSON serializable')") tb = None def reraise(tp, value, tb=None): """Reraise exception.""" if value.__traceback__ is not tb: raise value.with_traceback(tb) > raise value E kombu.exceptions.EncodeError: TypeError('Object of type MagicMock is not JSON serializable') .tox/py3/lib/python3.7/site-packages/vine/utils.py:30: EncodeError