How to use the 'required' argument in Redux Framework based on checkbox or checkbox sortable?

I install Redux Framework like a plugin in wordpress, copy redux-framework/sample/sample-config.php to my theme and change it. And I have problem with this part:

Redux::setSection( $opt_name, array(
    'id' => 'sec_test',
    'title' => __('test', 'redux-framework-demo'),
    'fields' => array(
        array(
            'id' => 'test_checkbox',
            'type' => 'checkbox',
            'title' => __('test', 'redux-framework-demo'),
            'options' => array(
                'test_1' => 'test 1',
                'test_2' => 'test 2',
            ),
            'default' => array(
                'test_1' => 1,
                'test_2' => 0,
            ),
        ),

        array(
            'id' => 'test_opt',
            'type' => 'text',
            'title' => __('test text', 'redux-framework-demo'),
            'required' => array('test_checkbox', '=', 'test_1'),
        ),
    )
) );

'required' in option 'test_opt' not work. I try this variations:

'required' => array('test_checkbox', '=', 'test_1'),
'required' => array('test_checkbox', '=', array('test_1')),
'required' => array('test_checkbox', '=', array('test_1' => 1)),
'required' => array('test_checkbox', 'contains', 'test_1'),
'required' => array('test_checkbox', 'contains', array('test_1')),
'required' => array('test_checkbox', 'contains', array('test_1' => 1)),

Nothing works. So, how correct use the ‘required’ argument?

Wordpress: 4.2.2

Redux Framework: 3.5.4.3

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