diff --git a/tests/backends/sqlite/test_creation.py b/tests/backends/sqlite/test_creation.py
index 72d032440f..723e481077 100644
--- a/tests/backends/sqlite/test_creation.py
+++ b/tests/backends/sqlite/test_creation.py
@@ -1,18 +1,16 @@
 import copy
 import unittest
 
-from django.db import connection
+from django.db import DEFAULT_DB_ALIAS, connection, connections
 from django.test import SimpleTestCase
 
 
 @unittest.skipUnless(connection.vendor == 'sqlite', 'SQLite tests')
 class TestDbSignatureTests(SimpleTestCase):
     def test_custom_test_name(self):
-        saved_settings = copy.deepcopy(connection.settings_dict)
-        try:
-            connection.settings_dict['NAME'] = None
-            connection.settings_dict['TEST']['NAME'] = 'custom.sqlite.db'
-            signature = connection.creation.test_db_signature()
-            self.assertEqual(signature, (None, 'custom.sqlite.db'))
-        finally:
-            connection.settings_dict = saved_settings
+        test_connection = copy.copy(connections[DEFAULT_DB_ALIAS])
+        test_connection.settings_dict = copy.deepcopy(connections[DEFAULT_DB_ALIAS].settings_dict)
+        test_connection.settings_dict['NAME'] = None
+        test_connection.settings_dict['TEST']['NAME'] = 'custom.sqlite.db'
+        signature = test_connection.creation_class(test_connection).test_db_signature()
+        self.assertEqual(signature, (None, 'custom.sqlite.db'))