diff --git a/tests/test_heartbeat.py b/tests/test_heartbeat.py
index f8ebe34..f1acc1e 100644
--- a/tests/test_heartbeat.py
+++ b/tests/test_heartbeat.py
@@ -1,7 +1,8 @@
-from typing import Any, Generator
+from collections.abc import Generator
+from typing import Any
 
-from flask.testing import FlaskClient
 import pytest
+from flask.testing import FlaskClient
 
 from src.app import app