1--TEST--
2The default value is a class constant in the parent class method's signature.
3--FILE--
4<?php
5class MyDateTimeZone extends DateTimeZone
6{
7    public static function listIdentifiers(): array
8    {
9    }
10}
11?>
12--EXPECTF--
13Fatal error: Declaration of MyDateTimeZone::listIdentifiers(): array must be compatible with DateTimeZone::listIdentifiers(int $timezoneGroup = DateTimeZone::ALL, ?string $countryCode = null): array in %s on line %d
14