Making singular words out of plural with Symfony Inflector

Code
<?php

use Symfony\Component\Inflector\Inflector;

dump(
    
Inflector::singularize('cats'),
    
Inflector::singularize('cacti'),
    
Inflector::singularize('berries'),
    
Inflector::singularize('scarves')
);
Result
"cat"

"cactus"

"berry"

array:3 [
0 => "scarf"
1 => "scarve"
2 => "scarff"
]
Used Versions
PHP 7.1, Zend 3.0, Symfony 3.2, Laravel 5.2, PHPUnit 5.6, Doctrine 2.6