Tests fail on Celery for Python 3.7 only about packtivity HOT 2 CLOSED

$ docker run --rm -ti python:3.7 /bin/bash
root@06c6d53d8eaf:/# python -m venv venv && . venv/bin/activate
(venv) root@06c6d53d8eaf:/# python -m pip --quiet install --upgrade pip setuptools wheel
(venv) root@06c6d53d8eaf:/# python -m pip --quiet install --upgrade celery
(venv) root@06c6d53d8eaf:/# python -m pip show celery
Name: celery
Version: 5.2.7
Summary: Distributed Task Queue.
Home-page: http://celeryproject.org
Author: Ask Solem
Author-email: [email protected]
License: BSD
Location: /venv/lib/python3.7/site-packages
Requires: billiard, click, click-didyoumean, click-plugins, click-repl, importlib-metadata, kombu, pytz, vine
Required-by: 
(venv) root@06c6d53d8eaf:/# python -c 'import celery'
(venv) root@06c6d53d8eaf:/# python -c 'from celery import Celery'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: cannot import name 'Celery' from 'celery' (/venv/lib/python3.7/site-packages/celery/__init__.py)
(venv) root@06c6d53d8eaf:/# 

$ docker run --rm -ti python:3.8 /bin/bash
root@aebe940fcecb:/# python -m venv venv && . venv/bin/activate
(venv) root@aebe940fcecb:/# python -m pip --quiet install --upgrade pip setuptools wheel
(venv) root@aebe940fcecb:/# python -m pip --quiet install --upgrade celery
(venv) root@aebe940fcecb:/# python -m pip show celery
Name: celery
Version: 5.2.7
Summary: Distributed Task Queue.
Home-page: http://celeryproject.org
Author: Ask Solem
Author-email: [email protected]
License: BSD
Location: /venv/lib/python3.8/site-packages
Requires: billiard, click, click-didyoumean, click-plugins, click-repl, kombu, pytz, vine
Required-by: 
(venv) root@aebe940fcecb:/# python -c 'import celery'
(venv) root@aebe940fcecb:/# python -c 'from celery import Celery'
(venv) root@aebe940fcecb:/#