diff --git a/samples/snippets/subscriber.py b/samples/snippets/subscriber.py
index 5c987be69..180b091db 100644
--- a/samples/snippets/subscriber.py
+++ b/samples/snippets/subscriber.py
@@ -1241,9 +1241,7 @@ def callback(message: pubsub_v1.subscriber.message.Message) -> None:
     otel_subscribe_parse.add_argument("subscription_project_id")
     otel_subscribe_parse.add_argument("cloud_trace_project_id")
     otel_subscribe_parse.add_argument("subscription_id")
-    otel_subscribe_parse.add_argument(
-        "timeout", default=None, type=float, nargs="?"
-    )
+    otel_subscribe_parse.add_argument("timeout", default=None, type=float, nargs="?")
 
     create_parser = subparsers.add_parser("create", help=create_subscription.__doc__)
     create_parser.add_argument("topic_id")