def test_user_updated_at_changing(): user = User(chat_id='123456').save() assert user.updated_at == datetime(2030, 1, 15) with freeze_time('2030-06-15'): user.full_name = 'Oh my dummy' user.save() assert user.updated_at == datetime(2030, 6, 15) assert user.created_at == datetime(2030, 1, 15)