diff --git a/newauth.py b/newauth.py
index 4747024c6..585574ce8 100644
--- a/newauth.py
+++ b/newauth.py
@@ -35,7 +35,9 @@ def SwitchedOn() -> bool:
 
 def Default() -> bool:
     "Returns default enablement status for new auth stack."
-    return False
+    if os.getenv('SWARMING_BOT_ID'):
+        return False
+    return True
 
 
 def _HasGitcookies() -> bool: