diff --git a/synapse/rest/client/login_token_request.py b/synapse/rest/client/login_token_request.py
index 4a521bf5319a..277b20fb638d 100644
--- a/synapse/rest/client/login_token_request.py
+++ b/synapse/rest/client/login_token_request.py
@@ -47,7 +47,9 @@ class LoginTokenRequestServlet(RestServlet):
     }
     """
 
-    PATTERNS = client_patterns("/org.matrix.msc3882/login/token$", releases=[], v1=False, unstable=True)
+    PATTERNS = client_patterns(
+        "/org.matrix.msc3882/login/token$", releases=[], v1=False, unstable=True
+    )
 
     def __init__(self, hs: "HomeServer"):
         super().__init__()