diff --git a/tests/test_CommandLine.py b/tests/test_CommandLine.py
index c8e88d4..2247d72 100644
--- a/tests/test_CommandLine.py
+++ b/tests/test_CommandLine.py
@@ -1,3 +1,4 @@
+from __future__ import annotations
 import unittest
 import subprocess
 import shutil