def METHOD_NAME(module_mock, mocker):
    mocker.patch('util.cli.execute')
    module = module_mock(['-p', 'amixer.device=CustomMaster'])
    command = mocker.patch('util.cli.execute')
    module.toggle(False)
    command.assert_called_once_with('amixer -c 0 -q set CustomMaster toggle')
    command = mocker.patch('util.cli.execute')
    module.increase_volume(False)
    command.assert_called_once_with('amixer -c 0 -q set CustomMaster 4%+')
    command = mocker.patch('util.cli.execute')
    module.decrease_volume(False)
    command.assert_called_once_with('amixer -c 0 -q set CustomMaster 4%-')