diff --git a/lib/auth.py b/lib/auth.py
index a276950..d3e906f 100644
--- a/lib/auth.py
+++ b/lib/auth.py
@@ -73,7 +73,7 @@
 
   result = cros_build_lib.RunCommand(
       cmd,
-      mute_output=False,
+      mute_output=True,
       error_code_ok=True)
 
   if result.returncode: