diff --git a/core/modules/text/src/Plugin/Field/FieldType/TextItemBase.php b/core/modules/text/src/Plugin/Field/FieldType/TextItemBase.php
index a3697e8..70ad104 100644
--- a/core/modules/text/src/Plugin/Field/FieldType/TextItemBase.php
+++ b/core/modules/text/src/Plugin/Field/FieldType/TextItemBase.php
@@ -89,7 +89,6 @@ public static function generateSampleValue(FieldDefinitionInterface $field_defin
 
     $values = array(
       'value' => $value,
-      'summary' => $value,
       'format' => filter_fallback_format(),
     );
     return $values;