diff --git a/tests/utils.py b/tests/utils.py
index f56e48a8..6bbed766 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -40,6 +40,7 @@
 
 LOGGER = get_logger(__name__)
 
+
 class TestAppContainer(object):
     test_app: Optional[TestApp] = None
     app: Optional[TestApp] = None