diff --git a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/formatter/TestFieldEmptyFormatter.php b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/formatter/TestFieldEmptyFormatter.php
index 70250e1..60aa0f0 100644
--- a/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/formatter/TestFieldEmptyFormatter.php
+++ b/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/Plugin/field/formatter/TestFieldEmptyFormatter.php
@@ -31,18 +31,24 @@ class TestFieldEmptyFormatter extends FormatterBase {
   /**
    * {@inheritdoc}
    */
+  public function prepareView(array $entities_items) {
+    foreach ($entities_items as $items) {
+      if ($items->isEmpty()) {
+        // For fields with no value, just add the configured "empty" value.
+        $items[0]->value = $this->getSetting('test_empty_string');
+      }
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function viewElements(FieldInterface $items) {
     $elements = array();
 
-    if ($items->isEmpty()) {
-      // For fields with no value, just add the configured "empty" value.
-      $elements[0] = array('#markup' => $this->getSetting('test_empty_string'));
-    }
-    else {
-      foreach ($items as $delta => $item) {
-        // This formatter only needs to output raw for testing.
-        $elements[$delta] = array('#markup' => $item->value);
-      }
+    foreach ($items as $delta => $item) {
+      // This formatter only needs to output raw for testing.
+      $elements[$delta] = array('#markup' => $item->value);
     }
 
     return $elements;