diff --git a/requirements_dev.txt b/requirements_dev.txt
index 21fc6ec..d21b604 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -2,4 +2,5 @@ numpy
 orjson
 pytest
 python-dateutil
+time-machine
 typing_extensions
diff --git a/tests/test_neofoodclub.py b/tests/test_neofoodclub.py
index e10d11e..896039d 100644
--- a/tests/test_neofoodclub.py
+++ b/tests/test_neofoodclub.py
@@ -2,6 +2,8 @@
 from typing import Any, Dict, Optional
 
 import pytest
+import time_machine
+from dateutil.tz import tzutc
 
 from neofoodclub import Modifier, NeoFoodClub
 from neofoodclub.errors import InvalidData
@@ -220,6 +222,11 @@ def test_outdated_lock(nfc: NeoFoodClub) -> None:
     assert nfc.is_outdated_lock is True
 
 
+@time_machine.travel(datetime.datetime(2021, 2, 16, 12, 0, 0, 0, tzinfo=tzutc()))
+def test_outdated_lock_false(nfc: NeoFoodClub) -> None:
+    assert nfc.is_outdated_lock is False
+
+
 def test_outdated_lock_none(nfc: NeoFoodClub) -> None:
     data = nfc.to_dict()