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 36308 Parallel testing fails reporting unit test combining subTest and assertNumQueries Jean Bvt "Updating from django 5.1.8 to 5.2.0, our test suit fails to correctly reports failed test. {{{ python manage.py test app.module.tests --parallel 8 Found 9 test(s). [...] Destroying test database for alias 'default'... Destroying test database for alias 'default'... Destroying test database for alias 'default'... Traceback (most recent call last): File ""/app/manage.py"", line 23, in main() File ""/app/manage.py"", line 19, in main execute_from_command_line(sys.argv) File ""/app/.venv/lib/python3.12/site-packages/django/core/management/__init__.py"", line 442, in execute_from_command_line utility.execute() File ""/app/.venv/lib/python3.12/site-packages/django/core/management/__init__.py"", line 436, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File ""/app/.venv/lib/python3.12/site-packages/django/core/management/commands/test.py"", line 24, in run_from_argv super().run_from_argv(argv) File ""/app/.venv/lib/python3.12/site-packages/django/core/management/base.py"", line 416, in run_from_argv self.execute(*args, **cmd_options) File ""/app/.venv/lib/python3.12/site-packages/django/core/management/base.py"", line 460, in execute output = self.handle(*args, **options) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File ""/app/.venv/lib/python3.12/site-packages/django/core/management/commands/test.py"", line 63, in handle failures = test_runner.run_tests(test_labels) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File ""/app/.venv/lib/python3.12/site-packages/django/test/runner.py"", line 1099, in run_tests result = self.run_suite(suite) ^^^^^^^^^^^^^^^^^^^^^ File ""/app/.venv/lib/python3.12/site-packages/django/test/runner.py"", line 1026, in run_suite return runner.run(suite) ^^^^^^^^^^^^^^^^^ File ""/usr/local/lib/python3.12/unittest/runner.py"", line 240, in run test(result) File ""/usr/local/lib/python3.12/unittest/suite.py"", line 84, in __call__ return self.run(*args, **kwds) ^^^^^^^^^^^^^^^^^^^^^^^ File ""/app/.venv/lib/python3.12/site-packages/django/test/runner.py"", line 553, in run subsuite_index, events = test_results.next(timeout=0.1) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File ""/usr/local/lib/python3.12/multiprocessing/pool.py"", line 873, in next raise value multiprocessing.pool.MaybeEncodingError: Error sending result: '(17, [('startTest', 0), ('addDuration', 0, 0.02817973299897858), ('addSuccess', 0), ('stopTest', 0), ('startTest', 1), ('addDuration', 1, 0.02015996399859432), ('addSuccess', 1), ('stopTest', 1), ('startTest', 2), ('addDuration', 2, 0.024580582001362927), ('addSuccess', 2), ('stopTest', 2), ('startTest', 3), ('addSubTest', 3, , (, AssertionError('3 != 2 : 3 queries executed, 2 expected\nCaptured queries were:\n1. SELECT ""app_tokenapi"".""id"", ""app_tokenapi"".""user_id"", ""app_tokenapi"".""key"", ""app_tokenapi"".""name"", ""app_tokenapi"".""scope_level"", ""app_tokenapi"".""created_at"", ""app_tokenapi"".""expired_at"", ""app_tokenapi"".""expire_reason"", ""auth_user"".""id"", ""auth_user"".""password"", ""auth_user"".""last_login"", ""auth_user"".""is_superuser"", ""auth_user"".""username"", ""auth_user"".""first_name"", ""auth_user"".""last_name"", ""auth_user"".""email"", ""auth_user"".""is_staff"", ""auth_user"".""is_active"", ""auth_user"".""date_joined"" FROM ""app_tokenapi"" INNER JOIN ""auth_user"" ON (""app_tokenapi"".""user_id"" = ""auth_user"".""id"") WHERE ""app_tokenapi"".""key"" = \'abcdabcd-abcd-abcd-abcd-abcdabcd\' ORDER BY ""app_tokenapi"".""id"" ASC LIMIT 1\n2. SELECT ""my_models_entite"".""id"", ""my_models_entite"".""deleted"", ""my_models_entite"".""deleted_by_cascade"", ""my_models_entite"".""some_id"", ""my_models_entite"".""parent_id"", ""my_models_entite"".""type_id"", ""my_models_entite"".""code"", ""my_models_entite"".""libelle"", ""my_models_entite"".""libelle_court"", ""my_models_entite"".""url_logo"", ""my_models_entite"".""begin_date"", ""my_models_entite"".""end_date"", ""my_models_entite"".""created_at"", ""my_models_entite"".""modified_at"", ""my_models_entite"".""json"", ""my_models_entite"".""allow_externe_id"", ""my_models_entitetype"".""id"", ""my_models_entitetype"".""name"", ""my_models_entitetype"".""id_rfu_link"", ""my_models_entitetype"".""id_imotep_link"", ""my_models_entitetype"".""created_at"", ""my_models_entitetype"".""modified_at"" FROM ""my_models_entite"" INNER JOIN ""my_models_entitetype"" ON (""my_models_entite"".""type_id"" = ""my_models_entitetype"".""id"") WHERE ""my_models_entite"".""deleted"" IS NULL ORDER BY ""my_models_entite"".""libelle"" ASC\n3. SELECT ""my_models_entite"".""id"", ""my_models_entite"".""deleted"", ""my_models_entite"".""deleted_by_cascade"", ""my_models_entite"".""some_id"", ""my_models_entite"".""parent_id"", ""my_models_entite"".""type_id"", ""my_models_entite"".""code"", ""my_models_entite"".""libelle"", ""my_models_entite"".""libelle_court"", ""my_models_entite"".""url_logo"", ""my_models_entite"".""begin_date"", ""my_models_entite"".""end_date"", ""my_models_entite"".""created_at"", ""my_models_entite"".""modified_at"", ""my_models_entite"".""json"", ""my_models_entite"".""allow_externe_id"" FROM ""my_models_entite"" WHERE (""my_models_entite"".""id"") IN ((54), (NULL), (59), (62), (56), (55), (58), (57))'), )), ('addDuration', 3, 0.032738704001531005), ('stopTest', 3), ('startTest', 4), ('addDuration', 4, 0.01990954599750694), ('addSuccess', 4), ('stopTest', 4), ('startTest', 5), ('addDuration', 5, 0.10901878799995757), ('addSuccess', 5), ('stopTest', 5), ('startTest', 6), ('addDuration', 6, 0.01989884100112249), ('addSuccess', 6), ('stopTest', 6)])'. Reason: 'AttributeError(""Can't get local object 'convert_exception_to_response..inner'"")' 6998993075), ('addSuccess', 6), ('stopTest', 6)])'. Reason: 'AttributeError(""Can't get local object 'convert_exception_to_response..inner'"")' }}} (I've renamed some name in this SQL queries for privacy reason) # the culprit test {{{ def test_queryset_performances(self): EntiteFactory.create() with self.subTest(""sub test""): with self.assertNumQueries(2): response = self.client.get(self.url) }}} # Reproductibility This errors does not happen if - We call only this test or only its TestCase (9 tests) - `self.client.get(self.url)` is not called, `assertNumQueries` still raise AssertionError but reporting works fine. - replacing `self.client.get(...)` with a simpler QuerySet call still raise AssertionError but reporting works fine. - we remove `self.subTest(...)` The problem does not appear in django 5.1.8 because the test succeeded in 5.1.8, it seems that 5.2 unexpectedly raised the number of query from 2 to 3 (notice the third query look redundant with the second query) so the core issue with reporting may be older than 5.2." Bug closed Testing framework 5.2 Normal needsinfo test assertNumQuery reporting David Winiecki Jacob Walls Unreviewed 0 0 0 0 0 0