conftest.py

import os
import sys
import pytest


def pytest_collection_modifyitems(items, config):
    for item in items:
        if not any(item.iter_markers()):
            item.add_marker("basic")

    markexpr = config.getoption("markexpr", 'False')
    
    expr = "basic"
    
    if markexpr:
        expr += f" or ({markexpr})"

    config.option.markexpr = expr


def pytest_deselected(items):
    if not items:
        return
    config = items[0].session.config
    config.deselected = items


def pytest_terminal_summary(terminalreporter, exitstatus, config):
    reports = terminalreporter.getreports('')
    content = os.linesep.join(text for report in reports for secname, text in report.sections)
    deselected = getattr(config, "deselected", [])
    if deselected:
        terminalreporter.ensure_newline()
        terminalreporter.section('Deselected tests', sep='-', yellow=True, bold=True)
        content = os.linesep.join(item.nodeid for item in deselected)
        terminalreporter.line(content)