swh_app = <Celery celery.tests at 0x7ff6a13d0048>
celery_session_worker = <Worker: gen658@b84cee4ca65b (running)>

    def test_ping(swh_app, celery_session_worker):
        res = swh_app.send_task(
            'swh.lister.phabricator.tasks.ping')
        assert res
>       res.wait()

swh/lister/phabricator/tests/test_tasks.py:10: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
.tox/py3/lib/python3.5/site-packages/celery/result.py:226: in get
    on_message=on_message,
.tox/py3/lib/python3.5/site-packages/celery/backends/base.py:500: in wait_for_pending
    return result.maybe_throw(propagate=propagate, callback=callback)
.tox/py3/lib/python3.5/site-packages/celery/result.py:331: in maybe_throw
    self.throw(value, self._to_remote_traceback(tb))
.tox/py3/lib/python3.5/site-packages/celery/result.py:324: in throw
    self.on_ready.throw(*args, **kwargs)
.tox/py3/lib/python3.5/site-packages/vine/promises.py:244: in throw
    reraise(type(exc), exc, tb)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

tp = <class 'celery.exceptions.NotRegistered'>
value = Task of kind 'swh.lister.phabricator.tasks.ping' never registered, please make sure it's imported.
tb = None

    def reraise(tp, value, tb=None):
        """Reraise exception."""
        if value.__traceback__ is not tb:
            raise value.with_traceback(tb)
>       raise value
E       celery.exceptions.NotRegistered: 'swh.lister.phabricator.tasks.ping'

.tox/py3/lib/python3.5/site-packages/vine/five.py:195: NotRegistered
----------------------------- Captured stderr call -----------------------------
[2019-04-27 22:56:55,596: ERROR/MainProcess] Received unregistered task of type 'swh.lister.phabricator.tasks.ping'.
The message has been ignored and discarded.

Did you remember to import the module containing this task?
Or maybe you're using relative imports?

Please see
http://docs.celeryq.org/en/latest/internals/protocol.html
for more information.

The full contents of the message body was:
b'\x93\x90\x80\x84\xa5chord\xc0\xa5chain\xc0\xa8errbacks\xc0\xa9callbacks\xc0' (39b)
Traceback (most recent call last):
  File "/home/jenkins/workspace/DLS/tox/.tox/py3/lib/python3.5/site-packages/celery/worker/consumer/consumer.py", line 559, in on_task_received
    strategy = strategies[type_]
KeyError: 'swh.lister.phabricator.tasks.ping'
------------------------------ Captured log call -------------------------------
consumer.py                494 ERROR    Received unregistered task of type 'swh.lister.phabricator.tasks.ping'.
The message has been ignored and discarded.

Did you remember to import the module containing this task?
Or maybe you're using relative imports?

Please see
http://docs.celeryq.org/en/latest/internals/protocol.html
for more information.

The full contents of the message body was:
b'\x93\x90\x80\x84\xa5chord\xc0\xa5chain\xc0\xa8errbacks\xc0\xa9callbacks\xc0' (39b)
Traceback (most recent call last):
  File "/home/jenkins/workspace/DLS/tox/.tox/py3/lib/python3.5/site-packages/celery/worker/consumer/consumer.py", line 559, in on_task_received
    strategy = strategies[type_]
KeyError: 'swh.lister.phabricator.tasks.ping'