How to run only unmarked tests in pytest

Question

I have several markers in my python test code:

@pytest.mark.slowtest
@pytest.mark.webtest
@pytest.mark.stagingtest

I am able to selectively run tests with a marker using for example pytest -m slowtest

How can I run unmarked tests without resorting to pytest -m "not (slowtest or webtest or stagingtest)"?

As you can imagine, we might use other markers in the future...

Answer 1

Another option I found useful is to use pytest.ini to add default options. We explicitly write which markers to skip. It entails mainlining the list of skipped markers in pytest.ini. In other words, not 100% what the OP asked for but this is the best SO question I found when looking for default markers. Hopefully, this can help others.

From the docs:

addopts

    Add the specified OPTS to the set of command line arguments as if they had been specified by the user. Example: if you have this ini file content:

    # content of pytest.ini
    [pytest]
    addopts = --maxfail=2 -rf  # exit after 2 failures, report fail info

    issuing pytest test_hello.py actually means:

    pytest --maxfail=2 -rf test_hello.py

    Default is to add no options.

What I added to my pytest.ini

[pytest]
addopts = -m "not slow"
markers =
    slow: marks tests as slow (deselect with '-m "not slow"')

Using it

﮸$ grep 'mark.slow' tests/*.py | wc -l
3

$ pytest -s
======================================================= test session starts ========================================================
platform linux -- Python 3.8.2, pytest-6.0.1, py-1.9.0, pluggy-0.13.1
rootdir: /tests, configfile: pytest.ini
collected 66 items / 3 deselected / 63 selected                                                                                    

../tests/test_app.py ...............................................................

================================================= 63 passed, 3 deselected in 8.70s =================================================