diff --git a/service/gcbrun_experiment.py b/service/gcbrun_experiment.py
index f19ab493d..b54233bcc 100644
--- a/service/gcbrun_experiment.py
+++ b/service/gcbrun_experiment.py
@@ -16,6 +16,7 @@
 """Entrypoint for gcbrun into run_experiment. This script will get the command
 from the last PR comment containing "/gcbrun" and pass it to run_experiment.py
 which will run an experiment."""
+# A dummy comment to trigger experiment run on pull request
 
 import logging
 import os