diff --git a/core/modules/field/tests/modules/field_computed_test/src/Plugin/Field/FieldType/DiceItemList.php b/core/modules/field/tests/modules/field_computed_test/src/Plugin/Field/FieldType/DiceItemList.php
index 004440b409..b671f9ccb5 100644
--- a/core/modules/field/tests/modules/field_computed_test/src/Plugin/Field/FieldType/DiceItemList.php
+++ b/core/modules/field/tests/modules/field_computed_test/src/Plugin/Field/FieldType/DiceItemList.php
@@ -14,13 +14,8 @@ class DiceItemList extends FieldItemList implements FieldItemListComputedInterfa
    * {@inheritdoc}
    */
   public function computeValue() {
-    $this->list = [];
     $values = $this->computeItemValues();
-    if (is_array($values) && !empty($values)) {
-      foreach ($values as $delta => $value) {
-        $this->list[] = $this->createItem($delta, $value);
-      }
-    }
+    $this->setValue($values);
   }
 
   /**
@@ -32,7 +27,7 @@ public function computeValue() {
   protected function computeItemValues() {
     $items_count = $this->getEntity()->field_dice_count->value;
     $values = [];
-    foreach (range(0, $items_count - 1) as $delta) {
+    for ($delta = 0; $delta < $items_count; $delta++) {
       $values[$delta] = [
         'value' => rand(1, 6),
       ];