diff --git a/h/tweens.py b/h/tweens.py
index de903345b55..3283a93d94a 100644
--- a/h/tweens.py
+++ b/h/tweens.py
@@ -13,7 +13,8 @@
 
 
 def conditional_http_tween_factory(
-    handler, registry  # noqa: ARG001
+    handler,
+    registry,  # noqa: ARG001
 ):  # pragma: no cover
     """Set up conditional response handling for some requests."""