def test_explicit_user_set_cookie(httpbin, target_httpbin, request):
    """User set cookies ARE NOT persisted within redirects when there is no session, even on the same domain."""
    target_httpbin = request.getfixturevalue(target_httpbin)
    r = http(
        '--follow',
        httpbin + '/redirect-to',
        f'url=={target_httpbin}/cookies',
        'Cookie:a=b'
    )
    assert r.json == {'cookies': {}}
User set cookies ARE NOT persisted within redirects when there is no session, even on the same domain.
tests/test_cookie_on_redirects.py