diff --git a/tools/wptrunner/wptrunner/executors/executorwebdriver.py b/tools/wptrunner/wptrunner/executors/executorwebdriver.py
index 7382698f3ceba86..bcfdac5c99f59a4 100644
--- a/tools/wptrunner/wptrunner/executors/executorwebdriver.py
+++ b/tools/wptrunner/wptrunner/executors/executorwebdriver.py
@@ -39,6 +39,7 @@ def set_timeout(self, timeout):
         try:
             self.webdriver.timeouts.script = timeout
         except client.WebDriverException:
+            # workaround https://bugs.chromium.org/p/chromedriver/issues/detail?id=2057
             body = {"type": "script", "ms": timeout * 1000}
             self.webdriver.session.send_session_command("POST", "timeouts", body)