How to find Cyrillic file in Symfony Finder?

Question

symfony

Good afternoon!
I implement file search using SYmfnony Finder Component.

$finder = new Finder();
$finder->files()->in('C:\'); 
$finder->files()->name('TEST.jpg');

Everything is fine while searching for the file name in Latin,
but if the Cyrillic alphabet
$finder->files()->name('ТЕСТ.jpg');
does not get into the search. Is that how it should be? or is there something wrong with me?