  import os
  import threading
  import time
  import warnings
  from contextlib import suppress
  
  from django.apps import apps
  from django.core.exceptions import ImproperlyConfigured
  from django.core.signals import setting_changed
  from django.db import connections, router
 
</s> remove from contextlib import suppress
 </s> add  </s> remove from contextlib import suppress
 </s> add  </s> remove from contextlib import suppress
 </s> add  </s> remove from contextlib import suppress
 </s> add  </s> remove from contextlib import suppress
 </s> add 
  import os
  import threading
  import time
  import warnings

  
  from django.apps import apps
  from django.core.exceptions import ImproperlyConfigured
  from django.core.signals import setting_changed
  from django.db import connections, router
keep keep keep keep replace keep keep keep keep keep
 Reverted "Fixed #27818 -- Replaced try/except/pass with contextlib.suppress()."

This reverts commit 550cb3a365dee4edfdd1563224d5304de2a57fda
because try/except performs better. 
django/test/signals.py