AttributeError on celery_session_app

I got the following error when launching error when lauching a celery task from pytest

Here is the code

@pytest.fixture(scope='session')
def celery_config():
    return {
        'broker_url': 'redis://redis:6379/0',
        'result_backend': 'redis://redis:6379/0',
        'task_always_eager': True,
        'task_eager_propagates': True
    }


@pytest.fixture(scope='session')
def celery_enable_logging():
    return True


@pytest.mark.usefixtures("celery_session_worker")
class TestMyTask(object):

    def test_task_failure(self, celery_session_worker):
        """
        """
        result = mytask.delay('hello')
        assert result.state == 'FAILURE'

The versions used

• pytest 4.1.1
• celery 4.2.0

I have tried downgrading to celery 4.0 and pytest 4.0, but I have the same issue This is a quite recent issue, I had run this code without trouble since last week about

Is there a bug behind this ?

Thank you

[asottile]

Sounds good! since this is confirmed an external issue I’ll close this Thanks for the issue 🎉

[gustelle]

Thanks Anthony
I confirm that downgrading to pytest==3.10.1 fixed the issue, waiting for the release of celery 4.3 to fix the pytest 4 integration