Fixes suggested by checkqa

Author: ktosiek

pytest_django/fixtures.py

@@ -4,6 +4,7 @@
 
 from contextlib import contextmanager
 import os
+import sys
 import warnings
 
 import pytest
@@ -223,6 +224,7 @@ def wrapper(request):
         # Use atomic instead of calling .savepoint* directly.
         # This way works for both top-level transactions and "subtransactions".
         atomic = transaction.atomic()
+
         def finalize():
             # Only run __exit__ if there was no error running the wrapped function.
             # Otherwise we've run it already.

pytest_django/plugin.py

@@ -24,7 +24,7 @@
 # Silence linters for imported fixtures.
 (_django_db_setup, _live_server_helper, admin_client, admin_user, client, db,
  django_user_model, django_username_field, live_server, rf, settings,
- transactional_db)
+ shared_db_wrapper, transactional_db)
 
 
 SETTINGS_MODULE_ENV = 'DJANGO_SETTINGS_MODULE'