diff --git a/locust/main.py b/locust/main.py
index a7cd65e968..45901f0d99 100644
--- a/locust/main.py
+++ b/locust/main.py
@@ -342,7 +342,7 @@ def timelimit_stop():
         pass  # dont log anything - not having a time limit is normal when not running headless
 
     input_listener_greenlet = None
-    if not options.worker:
+    if not options.worker and sys.stdout.isatty():
         # spawn input listener greenlet
         input_listener_greenlet = gevent.spawn(
             input_listener(