Update tests/phpunit/tests/abilities-api/wpRegisterCoreAbilities.php

Co-authored-by: Weston Ruter <[email protected]>

Author: jorgefilipecosta

tests/phpunit/tests/abilities-api/wpRegisterCoreAbilities.php

@@ -213,7 +213,7 @@ public function test_core_abilities_schemas_use_only_valid_keywords(): void {
 	 * @param string[]   $allowed_keywords List of allowed schema keywords.
 	 * @param string     $context          Context for error messages.
 	 */
-	private function assert_schema_uses_valid_keywords( $schema, array $allowed_keywords, string $context ): void {
+	private function assert_schema_uses_valid_keywords( ?array $schema, array $allowed_keywords, string $context ): void {
 		if ( empty( $schema ) || ! is_array( $schema ) ) {
 			return;
 		}