1--TEST-- 2Test that no notice is emitted when the return type/value of the overriding method is compatible with the tentative return type/value of the overridden method 3--FILE-- 4<?php 5class MyDateTimeZone extends DateTimeZone 6{ 7 public static function listIdentifiers(int $timezoneGroup = DateTimeZone::ALL, ?string $countryCode = null): array 8 { 9 return []; 10 } 11} 12 13var_dump(MyDateTimeZone::listIdentifiers()); 14?> 15--EXPECT-- 16array(0) { 17} 18