1 files changed, 3 insertions, 3 deletions
diff --git a/tests/server.py b/tests/server.py
index 84ed9f68eb..f01708b77f 100644
--- a/tests/server.py
+++ b/tests/server.py
@@ -225,9 +225,9 @@ class FakeChannel:
                 new_headers.addRawHeader(k, v)
             headers = new_headers
 
-        assert isinstance(
-            headers, Headers
-        ), f"headers are of the wrong type: {headers!r}"
+        assert isinstance(headers, Headers), (
+            f"headers are of the wrong type: {headers!r}"
+        )
 
         self.result["headers"] = headers