How to download file as .xlsx in Laravel

I have file saved in resource with .xlsx extension but while downloading from browser it appears as .xls

$path = $processor->process($result->toArray(), 'test.xlsx');
$headers = [
                'Content-Type'              => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
                'Content-Length'            => filesize($path),
                'Cache-Control'             => 'must-revalidate',
                'Content-Transfer-Encoding' => 'binary',
                'Content-Disposition'       => 'attachment; filename="test.xlsx"'
            ];

return response()->download($path, 'test.xlsx', $headers);