def METHOD_NAME(mock_sub, capsys, platform, sub_kw):
    """A simple call will be invoked."""
    mock_sub.tools.sys.platform = platform
    mock_sub.run(["hello", "world"], stream_output=False)
    mock_sub._subprocess.run.assert_called_with(["hello", "world"], **sub_kw)
    assert capsys.readouterr().out == ""