diff --git a/bluesky/output.py b/bluesky/output.py
index 43f7daf..da53264 100644
--- a/bluesky/output.py
+++ b/bluesky/output.py
@@ -100,7 +100,7 @@ class BlueskyOutputService(BlueskyService, OutputService):
             self.did,
             http,
             self.options.password,
-            client_name=options.client_name
+            client_name=options.client_name,
         )
         self.options.password = ""
         self.log.info("Logged in as '%s'", self.did)