diff --git a/tools/autotest.py b/tools/autotest.py
index e17fc3dc..83939034 100644
--- a/tools/autotest.py
+++ b/tools/autotest.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
 from selenium import webdriver
 from selenium.webdriver.common.by import By
 from selenium.webdriver.support import expected_conditions