conftest.py

import pytest
import re


def pytest_addoption(parser):
    parser.addoption(
        "--runslow", action="store_true", default=False, help="run slow tests"
    )

def pytest_collection_modifyitems(config, items):
    if config.getoption("--runslow"): return
    skip_slow = pytest.mark.skip(reason="need --runslow option to run")
    for item in items:
        if "slow" in item.keywords: item.add_marker(skip_slow)


"""
def pytest_itemcollected(item):
    #import pdb; pdb.set_trace()
    par = item.parent.obj
    node = item.obj
    pref = par.__doc__.strip() if par.__doc__ else par.__class__.__name__
    pref = re.sub(r'^Test', '', pref)
    if pref=='module': pref = re.sub(r'^test_', '', par.__name__)
    suf = node.__doc__.strip() if node.__doc__ else node.__name__
    suf = re.sub(r'^test_', '', suf)
    suf = ' '.join(suf.split('_'))
    item.name = f'{pref}::{suf}'
"""