diff --git a/tests/unit/gapic/pubsub_v1/test_publisher.py b/tests/unit/gapic/pubsub_v1/test_publisher.py
index 3d14f88e6..aca4c59dd 100644
--- a/tests/unit/gapic/pubsub_v1/test_publisher.py
+++ b/tests/unit/gapic/pubsub_v1/test_publisher.py
@@ -1738,8 +1738,7 @@ def test_publish_flattened():
         # Call the method with a truthy value for each flattened field,
         # using the keyword arguments to the method.
         client.publish(
-            topic="topic_value",
-            messages=[pubsub.PubsubMessage(data=b"data_blob")]
+            topic="topic_value", messages=[pubsub.PubsubMessage(data=b"data_blob")]
         )
 
         # Establish that the underlying call was made with the expected