Laravel Validator doesnt work for mime type XML

I have a validator set up to check if the document we upload is an XML file

if ($request->input('action') == 'upload_document') {
                $validator = Validator::make($request->all(), [
                    'file' => 'bail|required|mimes:application/xml,xml|max:10000',
                    ]
                );

But when I do my upload, this validator triggers me an error "File must e of type application/xml,xml" even when I drop a real XML file with a .xml extension.

I have in my php.ini config extension=php_fileinfo.dll of course

via Chebli Mohamed