pip install freezegun python from freezegun import freeze_time python @freeze_time('2022-01-01') def test_function(): current_time = datetime.now() print(current_time) python @freeze_time('2022-01-01') class TestMyClass(unittest.TestCase): def test_method1(self): current_time = datetime.now() print(current_time) def test_method2(self): current_time = datetime.now() print(current_time) python class TestMyClass(unittest.TestCase): def test_method1(self): with freeze_time('2022-01-01'): current_time = datetime.now() print(current_time) def test_method2(self): with freeze_time('2022-02-01'): current_time = datetime.now() print(current_time)