Flaky test: tests/sentry/incidents/serializers/test_workflow_engine_incident.py::TestIncidentSerializer::test_detailed

Failing test: tests/sentry/incidents/serializers/test_workflow_engine_incident.py::TestIncidentSerializer::test_detailed
Sentry sha: 4a8dadc9c184ad93a761561c5f57437a29cd3300
Run: https://github.com/getsentry/sentry/actions/runs/22283663600

tests/sentry/incidents/serializers/test_workflow_engine_incident.py:54: in test_detailed
    assert serialized_incident == self.incident_expected
E   AssertionError: assert {'activities'...one.utc), ...} == {'activities'...one.utc), ...}
E     
E     Omitting 14 identical items, use -vv to show
E     Differing items:
E     {'alertRule': {'aggregate': 'count()', 'createdBy': None, 'dateCreated': datetime.datetime(2024, 12, 11, 3, 21, 34, tz...datetime.timezone.utc), 'dateModified': datetime.datetime(2024, 12, 11, 3, 21, 34, tzinfo=datetime.timezone.utc), ...}} != {'alertRule': {'aggregate': 'count()', 'createdBy': None, 'dateCreated': datetime.datetime(2024, 12, 11, 3, 21, 34, tz...datetime.timezone.utc), 'dateModified': datetime.datetime(2024, 12, 11, 3, 21, 34, tzinfo=datetime.timezone.utc), ...}}
E     
E     Full diff:
E       {
E           'activities': None,
E           'alertRule': {
E               'aggregate': 'count()',
E               'createdBy': None,
E               'dateCreated': datetime.datetime(2024, 12, 11, 3, 21, 34, tzinfo=datetime.timezone.utc),
E               'dateModified': datetime.datetime(2024, 12, 11, 3, 21, 34, tzinfo=datetime.timezone.utc),
E               'description': '',
E               'detectionType': 'static',
E               'id': '82',
E               'name': 'Enabled Seagull',
E               'organizationId': '4555195392327680',
E               'owner': None,
E               'projects': [
E                   'bar',
E               ],
E               'query': 'level:error',
E               'resolution': 1.0,
E               'status': 0,
E               'thresholdPeriod': 1,
E               'timeWindow': 10.0,
E               'triggers': [
E                   {
E                       'actions': [
E                           {
E     +                         'alertRuleTriggerId': '58',
E     +                         'dateCreated': datetime.datetime(2024, 12, 11, 3, 21, 34, tzinfo=datetime.timezone.utc),
E     +                         'desc': 'Send a notification to admin@localhost',
E     +                         'id': '54',
E     +                         'inputChannelId': None,
E     +                         'integrationId': None,
E     +                         'priority': None,
E     +                         'sentryAppId': None,
E     +                         'targetIdentifier': '1970',
E     +                         'targetType': 'user',
E     +                         'type': 'email',
E     +                     },
E     +                 ],
E     +                 'alertRuleId': '82',
E     +                 'alertThreshold': 50,
E     +                 'dateCreated': datetime.datetime(2024, 12, 11, 3, 21, 34, tzinfo=datetime.timezone.utc),
E     +                 'id': '58',
E     +                 'label': 'warning',
E     +                 'resolveThreshold': 50,
E     +                 'thresholdType': 0,
E     +             },
E     +             {
E     +                 'actions': [
E     +                     {
E                               'alertRuleTriggerId': '57',
E                               'dateCreated': datetime.datetime(2024, 12, 11, 3, 21, 34, tzinfo=datetime.timezone.utc),
E                               'desc': 'Send a notification to admin@localhost',
E                               'id': '53',
E                               'inputChannelId': None,
E                               'integrationId': None,
E                               'priority': None,
E                               'sentryAppId': None,
E                               'targetIdentifier': '1970',
E                               'targetType': 'user',
E                               'type': 'email',
E                           },
E                       ],
E                       'alertRuleId': '82',
E                       'alertThreshold': 100,
E                       'dateCreated': datetime.datetime(2024, 12, 11, 3, 21, 34, tzinfo=datetime.timezone.utc),
E                       'id': '57',
E                       'label': 'critical',
E                       'resolveThreshold': 50,
E                       'thresholdType': 0,
E                   },
E     -             {
E     -                 'actions': [
E     -                     {
E     -                         'alertRuleTriggerId': '58',
E     -                         'dateCreated': datetime.datetime(2024, 12, 11, 3, 21, 34, tzinfo=datetime.timezone.utc),
E     -                         'desc': 'Send a notification to admin@localhost',
E     -                         'id': '54',
E     -                         'inputChannelId': None,
E     -                         'integrationId': None,
E     -                         'priority': None,
E     -                         'sentryAppId': None,
E     -                         'targetIdentifier': '1970',
E     -                         'targetType': 'user',
E     -                         'type': 'email',
E     -                     },
E     -                 ],
E     -                 'alertRuleId': '82',
E     -                 'alertThreshold': 50,
E     -                 'dateCreated': datetime.datetime(2024, 12, 11, 3, 21, 34, tzinfo=datetime.timezone.utc),
E     -                 'id': '58',
E     -                 'label': 'warning',
E     -                 'resolveThreshold': 50,
E     -                 'thresholdType': 0,
E     -             },
E               ],
E           },
E           'dateClosed': None,
E           'dateCreated': datetime.datetime(2024, 12, 11, 3, 21, 34, tzinfo=datetime.timezone.utc),
E           'dateDetected': datetime.datetime(2024, 12, 11, 3, 21, 34, tzinfo=datetime.timezone.utc),
E           'dateStarted': datetime.datetime(2024, 12, 11, 3, 21, 34, tzinfo=datetime.timezone.utc),
E           'discoverQuery': '(event.type:error) AND (level:error)',
E           'id': '24',
E           'identifier': '1',
E           'organizationId': '4555195392327680',
E           'projects': [
E               'bar',
E           ],
E           'status': 20,
E           'statusMethod': 3,
E           'title': 'Hello world',
E           'type': 2,
E       }

Start with tests/sentry/incidents/serializers/test_workflow_engine_incident.py::TestIncidentSerializer::test_detailed and reproduce the failure from the linked Actions run. Inspect the full assertion diff, especially the alertRule triggers and actions ordering. Done means the test passes reliably without depending on intermittent serialized output ordering.