Consider the following sample:

import pytest


@pytest.mark.flaky
def test_foo():
    assert False


@pytest.mark.flaky(reruns=3)
def test_bar():
    assert False

This causes the tests to be rerun exactly once and 3 times, independently of --reruns=... parameter on the CLI. I would find it really helpful to be able to override the upstream defaults somehow via the command-line, as our downstream workflows often suffer from much more flakiness than the pristine upstream CI.