diff --git a/schemes/sessions.py b/schemes/sessions.py
index 0cbf6cf6..8c03ae2b 100644
--- a/schemes/sessions.py
+++ b/schemes/sessions.py
@@ -19,6 +19,7 @@ class RequestFilteringSessionInterface(DelegatingSessionInterface):
 
     See: https://github.com/pallets-eco/flask-session/issues/254
     """
+
     def __init__(self, delegate: SessionInterface, exclude_path_prefix: str):
         super().__init__(delegate)
         self._exclude_path_prefix = exclude_path_prefix