diff --git a/sky/authentication.py b/sky/authentication.py
index b10783b6143..c61e0ce36c8 100644
--- a/sky/authentication.py
+++ b/sky/authentication.py
@@ -467,9 +467,7 @@ def setup_kubernetes_authentication(config: Dict[str, Any]) -> Dict[str, Any]:
         #   on GKE.
         ssh_target = config['cluster_name'] + '-head'
         ssh_proxy_cmd = kubernetes_utils.get_ssh_proxy_command(
-            ssh_target,
-            port_forward_mode,
-            private_key_path=private_key_path)
+            ssh_target, port_forward_mode, private_key_path=private_key_path)
     else:
         # This should never happen because we check for this in from_str above.
         raise ValueError(f'Unsupported networking mode: {network_mode_str}')