diff --git a/src/python_eulerian_video_magnification/metadata.py b/src/python_eulerian_video_magnification/metadata.py
index d7dcb2a..65576e2 100644
--- a/src/python_eulerian_video_magnification/metadata.py
+++ b/src/python_eulerian_video_magnification/metadata.py
@@ -37,7 +37,7 @@ def __getitem__(self, item):
 
     def save_meta_data(self):
         """stores the meta data dictionary as a json"""
-        self.__data['date'] = self.get_date()
+        self.__data['date'] = MetaData.get_date()
         with open(self.__data['meta_target'], 'w') as fp:
             json.dump(self.__data, fp=fp, sort_keys=True, indent=4, separators=(',', ': '))
 
diff --git a/tests/test_video_motion_handling.py b/tests/test_video_motion_handling.py
index a93bb22..882f973 100644
--- a/tests/test_video_motion_handling.py
+++ b/tests/test_video_motion_handling.py
@@ -6,7 +6,8 @@
 sample = os.path.join(os.getcwd(), 'tests', 'videos', 'guitar1sec.mp4')
 
 
-def test_process_video(tmp_path, capsys):
+def test_process_video(tmp_path, capsys, monkeypatch):
+    monkeypatch.setattr(MetaData, "get_date", lambda: "2020-01-01-16:16:16")
     main([sample, '-o', str(tmp_path)])
 
     captured = capsys.readouterr()