Add missing type hints to tests.config. (#14681)

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/config/test_database.py b/tests/config/test_database.py

index 9eca10bbe9..240277bcc6 100644
--- a/tests/config/test_database.py
+++ b/tests/config/test_database.py
@@ -20,7 +20,7 @@ from tests import unittest
 
 
 class DatabaseConfigTestCase(unittest.TestCase):
-    def test_database_configured_correctly(self):
+    def test_database_configured_correctly(self) -> None:
         conf = yaml.safe_load(
             DatabaseConfig().generate_config_section(data_dir_path="/data_dir_path")
         )