#34930: Parallel tests fail on Python 3.11+ and MacOS.
-------------------------------------+-------------------------------------
     Reporter:  Matt Hegarty         |                    Owner:  nobody
         Type:  Bug                  |                   Status:  closed
    Component:  Testing framework    |                  Version:  4.2
     Severity:  Normal               |               Resolution:  needsinfo
     Keywords:  pickle               |             Triage Stage:
  _contextvars.Context _contextvars  |  Unreviewed
  Context                            |
    Has patch:  0                    |      Needs documentation:  0
  Needs tests:  0                    |  Patch needs improvement:  0
Easy pickings:  0                    |                    UI/UX:  0
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Comment (by Matt Hegarty):

 - Reproducible on Ubuntu and MacOS
 - using python 3.11 or 3.12 (3.10 is ok)
 - using Django 4.1 or higher (4.0.10 is ok)
 - Needs to have 2 or more test classes
 - 1 class has to subclass IsolatedAsyncioTestCase

 This will show the issue:

 {{{
 git clone [email protected]:matthewhegarty/tutorial.git
 cd tutorial
 mkvirtualenv -p `which python3.11` -r requirements.txt tutorial-311

 # fails
 ./manage.py test --parallel

 # ok
 ./manage.py test
 }}}

 Some other testing

 - Django 4.0.10 [OK]
 - Django 4.1 [FAIL] (but with different error)
 - Django 4.1.1 [FAIL] (error from
 https://code.djangoproject.com/ticket/34010)
 - Django 4.1.2 [FAIL] (first instance of this error)
 - Django 4.1.8 [FAIL]

-- 
Ticket URL: <https://code.djangoproject.com/ticket/34930#comment:2>
Django <https://code.djangoproject.com/>
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