diff --git a/tests/states/wick_test.py b/tests/states/wick_test.py
index 9c6b13dbe..e3e5f95f8 100644
--- a/tests/states/wick_test.py
+++ b/tests/states/wick_test.py
@@ -10,6 +10,8 @@
 
 """Test Wick's theorem utilities."""
 
+from __future__ import annotations
+
 import numpy as np
 import pytest
 import scipy.linalg