ACF-hook to filter the query of a posts field

gistfile1.txt

function test_field( $args, $field, $post ) {
// modify the order
    $args['orderby'] = 'date';
    $args['order'] = 'DESC';
    $args['posts_per_page'] = 2;

    return $args;
}

add_filter('acf/fields/post_object/query/key=field_5442b71190417', 'test_field', 10, 3);