diff --git a/core/modules/field_ui/lib/Drupal/field_ui/Tests/ManageFieldsTest.php b/core/modules/field_ui/lib/Drupal/field_ui/Tests/ManageFieldsTest.php
index e8a2f51..0d38710 100644
--- a/core/modules/field_ui/lib/Drupal/field_ui/Tests/ManageFieldsTest.php
+++ b/core/modules/field_ui/lib/Drupal/field_ui/Tests/ManageFieldsTest.php
@@ -367,7 +367,7 @@ function testPlaceholderElement() {
     );
 
     $instance_edit = array(
-      'instance[placeholder]' => 'This is a placeholder',
+      'instance[widget][settings][placeholder]' => 'This is a placeholder',
     );
     $this->fieldUIAddNewField($bundle_path, $initial_edit, array(), $instance_edit);