id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
33627	model_forms.tests.ModelMultipleChoiceFieldTests.test_model_multiple_choice_field fails when running together with other cases	Xiang Zhang	Sander Beekhuis	"When running `python3 runtests.py model_forms` case `model_forms.tests.ModelMultipleChoiceFieldTests.test_model_multiple_choice_field` might fail:


{{{
python3 runtests.py model_forms --noinput --settings tidb_settings
  Testing against Django installed in '/home/runner/work/django-tidb/django-tidb/django_tests_dir/django/django' with up to 2 processes
  Found 177 test(s).
  Creating test database for alias 'default'...
  System check identified no issues (0 silenced).
  ...............................................................................................................F.................................................................
  ======================================================================
  FAIL: test_model_multiple_choice_field (model_forms.tests.ModelMultipleChoiceFieldTests)
  ----------------------------------------------------------------------
  Traceback (most recent call last):
    File ""/home/runner/work/django-tidb/django-tidb/django_tests_dir/django/tests/model_forms/tests.py"", line 2088, in test_model_multiple_choice_field
      with self.assertRaises(ValidationError):
  AssertionError: ValidationError not raised
}}}

Running it solely could succeed consistently. After some ingestion, I found the reason is the `id` field of `model_forms_category` is `auto_increment`. If you run the suite together, it might hit `100` by accident and then fail."	Cleanup/optimization	closed	Testing framework	4.0	Normal	fixed			Ready for checkin	1	0	0	0	1	0