do not give postgres a chance to order arbitrarily

spiffworkflow-backend/tests/spiffworkflow_backend/unit/test_process_instance_service.py

@@ -325,7 +325,7 @@ class TestProcessInstanceService(BaseTest):
 
         pi_events = ProcessInstanceEventModel.query.filter_by(
             process_instance_id=process_instance.id, event_type=ProcessInstanceEventType.process_instance_migrated.value
-        ).all()
+        ).order_by(ProcessInstanceEventModel.id).all()
         assert len(pi_events) == 2
 
         process_instance_event = pi_events[0]