pytest-ordering relative order not working?

Question

I want to run some test by order, and i use pytest-ordering follow the offical article, but the order not change at all?

import pytest

@pytest.mark.run(after='test_second')
def test_third():
    assert True

def test_second():
    assert True

@pytest.mark.run(before='test_second')
def test_first():
    assert True

It should be test_first, test_second, test_third order.
But The order don't change at all ???

E:\QT-learn>pytest -svv
============================================================================= test session starts =============================================================================
platform win32 -- Python 3.7.4, pytest-5.4.3, py-1.9.0, pluggy-0.13.1 -- c:\users\jekoie\appdata\local\programs\python\python37-32\python.exe
cachedir: .pytest_cache
rootdir: E:\QT-learn, inifile: pytest.ini
plugins: ordering-0.6
collected 3 items                                                                                                                                                              

test_qt.py::test_third PASSED
test_qt.py::test_second PASSED
test_qt.py::test_first PASSED

============================================================================== 3 passed in 0.04s ==============================================================================

E:\QT-learn>

Answer 1

The documentation of pytest-ordering has a chapter named "Aspirational" with the following note:

This section is for functionality I’d like to implement. Documentation-driven design :)

The usage of before and after falls under this category.

You have to use the implemented functionality instead:

import pytest

@pytest.mark.run(order=3)
def test_third():
    assert True

@pytest.mark.run(order=2)
def test_second():
    assert True

@pytest.mark.run(order=1)
def test_first():
    assert True

Note also that the method described in the documentation (using @pytest.mark.order1 etc.) does not work with the current version - the correct version is the one in the README. There is a pull request that would fix the documentation, but the project seems to be no longer maintained.

UPDATE:
pytest-order is a fork of pytest-ordering that implements this functionality (though beware the changed marker name). It is the successor of pytest-ordering which is no longer maintained. Disclaimer: I'm the author of that fork.