diff --git a/tests/test_bidict.py b/tests/test_bidict.py
index 461d08b..d48ffe8 100644
--- a/tests/test_bidict.py
+++ b/tests/test_bidict.py
@@ -59,3 +59,3 @@ from hypothesis.strategies import sampled_from
 from hypothesis.strategies import tuples
-from typing_extensions import assert_type
+from typing import assert_type