def METHOD_NAME(execvpe, fork, getpid):
    arbiter = gunicorn.arbiter.Arbiter(DummyApplication())
    arbiter.LISTENERS = [mock.Mock(), mock.Mock()]
    arbiter.systemd = True
    fork.return_value = 0
    getpid.side_effect = [2, 3]
    arbiter.reexec()
    environ = execvpe.call_args[0][2]
    assert environ['GUNICORN_PID'] == '2'
    assert environ['LISTEN_FDS'] == '2'
    assert environ['LISTEN_PID'] == '3'