can you check here why python 2.7 is failing? #6095

By curiosity, why do you keep python 2.7 as it's EOL since January, 1st 2020?

will drop it in celery 4.5

should we try xenial for python 2.7?

Pytest > 4.6.x does not support python < 3.5
But here the problem is about wrong arguments passed to pytest.
Command specified for unit tests in tox.ini seems not compatible with python 2.7.
I don't know which version of pytest it's using though.

It was working with bionic and python 2.7 on this patch https://travis-ci.org/github/celery/celery/builds/667597080 so it's not related to distribution.

The first build with error on python 2.7 was https://travis-ci.org/github/celery/celery/builds/677296325

apparently this PR is not needed as only python 2.7 parsing command failing on master