  import datetime
  import threading
  import unittest
  import warnings
  from contextlib import suppress
  
  from django.core.management.color import no_style
  from django.db import (
      DEFAULT_DB_ALIAS, DatabaseError, IntegrityError, connection, connections,
      reset_queries, transaction,
 
</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 datetime
  import threading
  import unittest
  import warnings

  
  from django.core.management.color import no_style
  from django.db import (
      DEFAULT_DB_ALIAS, DatabaseError, IntegrityError, connection, connections,
      reset_queries, transaction,
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. 
tests/backends/tests.py