Resolve #3496529 "Key value"

Closes #3496529

core/modules/file/tests/file_test/src/Hook/FileTestHooks.php

@@ -212,7 +212,7 @@ public function entityTypeAlter(&$entity_types) : void {
    * @see Drupal\file_test\FileTestHelper::reset()
    */
   public function getReturn($op): array|int|null {
-    $return = \Drupal::state()->get('file_test.return', [$op => NULL]);
+    $return = \Drupal::keyValue('file_test')->get('return', [$op => NULL]);
     return $return[$op];
   }