diff --git a/tests/browser/test_browser.py b/tests/browser/test_browser.py
index c8a2636af..c21dfa8cb 100644
--- a/tests/browser/test_browser.py
+++ b/tests/browser/test_browser.py
@@ -1,3 +1,4 @@
+import os
 import unittest
 from unittest.mock import patch