diff --git a/django/test/utils.py b/django/test/utils.py
index 2890334eda..75139f2a05 100644
--- a/django/test/utils.py
+++ b/django/test/utils.py
@@ -378,7 +378,9 @@ def teardown_databases(old_config, verbosity, parallel=0, keepdb=False):
                 if parallel > 1:
                     for index in range(parallel):
                         connection.settings_dict["NAME"] = test_database_name
-                        settings_dict = connection.creation.get_test_db_clone_settings(str(index + 1))
+                        settings_dict = connection.creation.get_test_db_clone_settings(
+                            str(index + 1)
+                        )
                         connection.settings_dict.update(settings_dict)
                         connection.close()
                         connection.creation.deserialize_db_from_string(serialized_data)
@@ -391,7 +393,6 @@ def teardown_databases(old_config, verbosity, parallel=0, keepdb=False):
                 connection.close()
 
 
-
 def get_runner(settings, test_runner_class=None):
     test_runner_class = test_runner_class or settings.TEST_RUNNER
     test_path = test_runner_class.split(".")