diff --git a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldWidget/TestFieldWidgetMultiple.php b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldWidget/TestFieldWidgetMultiple.php
index 21edf08ab4154194fc928905083bd933f57e3785..be8fed9d2d942e422334affb57ec543327c345e7 100644
--- a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldWidget/TestFieldWidgetMultiple.php
+++ b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/Field/FieldWidget/TestFieldWidgetMultiple.php
@@ -58,7 +58,7 @@ public function settingsSummary() {
    */
   public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, array &$form_state) {
     $values = array();
-    foreach ($items as $delta => $item) {
+    foreach ($items as $item) {
       $values[] = $item->value;
     }
     $element += array(