diff --git a/tests/pretty_format_json_test.py b/tests/pretty_format_json_test.py
index 7fda23b..5ded724 100644
--- a/tests/pretty_format_json_test.py
+++ b/tests/pretty_format_json_test.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import os
 import shutil