diff --git a/tests/test_ext_autosummary.py b/tests/test_ext_autosummary.py
index 59f52bd9f..58fbb0967 100644
--- a/tests/test_ext_autosummary.py
+++ b/tests/test_ext_autosummary.py
@@ -10,7 +10,6 @@
 
 import sys
 from io import StringIO
-import os
 from unittest.mock import Mock, patch
 
 import pytest