初学者跟着视频写的，结果不一样，原因是啥啊

import pytest
class TestLogin(object):

    def test_account(self):
        pass
    def test_wrong(self):
        pass
if __name__ == '__main__':
    pytest.main(['-s','new.py'])

结果：

Ran 0 tests in 0.000s

OK

Process finished with exit code 0

Empty suite

Empty suite
什么原因啊

把代码用代码块贴一下