diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItem.php
index 5efe7ac..6d84487 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItem.php
@@ -66,15 +66,15 @@ public static function schema(FieldDefinitionInterface $field_definition) {
    * {@inheritdoc}
    */
   public function getConstraints() {
-    $constraint_manager = \Drupal::typedDataManager()->getValidationConstraintManager();
     $constraints = parent::getConstraints();
 
     if ($max_length = $this->getFieldSetting('max_length')) {
+      $constraint_manager = \Drupal::typedDataManager()->getValidationConstraintManager();
       $constraints[] = $constraint_manager->create('ComplexData', array(
         'value' => array(
           'Length' => array(
             'max' => $max_length,
-            'maxMessage' => t('%name: the text may not be longer than @max characters.', array('%name' => $this->getFieldDefinition()->getLabel(), '@max' => $max_length)),
+            //'maxMessage' => t('%name: the text may not be longer than @max characters.', array('%name' => $this->getFieldDefinition()->getLabel(), '@max' => $max_length)),
           )
         ),
       ));
diff --git a/core/modules/text/lib/Drupal/text/Plugin/Field/FieldType/TextLongItem.php b/core/modules/text/lib/Drupal/text/Plugin/Field/FieldType/TextLongItem.php
index e27a477..7e378fc 100644
--- a/core/modules/text/lib/Drupal/text/Plugin/Field/FieldType/TextLongItem.php
+++ b/core/modules/text/lib/Drupal/text/Plugin/Field/FieldType/TextLongItem.php
@@ -67,9 +67,4 @@ public function instanceSettingsForm(array $form, array &$form_state) {
     return $element;
   }
 
-  /**
-   * {@inheritdoc}
-   */
-  public function getConstraints() {}
-
 }
diff --git a/core/modules/text/lib/Drupal/text/Plugin/Field/FieldType/TextWithSummaryItem.php b/core/modules/text/lib/Drupal/text/Plugin/Field/FieldType/TextWithSummaryItem.php
index fec7d3c..36df950 100644
--- a/core/modules/text/lib/Drupal/text/Plugin/Field/FieldType/TextWithSummaryItem.php
+++ b/core/modules/text/lib/Drupal/text/Plugin/Field/FieldType/TextWithSummaryItem.php
@@ -116,9 +116,4 @@ public function instanceSettingsForm(array $form, array &$form_state) {
     return $element;
   }
 
-  /**
-   * {@inheritdoc}
-   */
-  public function getConstraints() {}
-
 }
diff --git a/core/modules/user/lib/Drupal/user/Entity/User.php b/core/modules/user/lib/Drupal/user/Entity/User.php
index f9db482..0c197da 100644
--- a/core/modules/user/lib/Drupal/user/Entity/User.php
+++ b/core/modules/user/lib/Drupal/user/Entity/User.php
@@ -473,7 +473,7 @@ public static function baseFieldDefinitions($entity_type) {
     $fields['signature'] = FieldDefinition::create('string')
       ->setLabel(t('Signature'))
       ->setDescription(t('The signature of this user.'))
-      ->setPropertyConstraints('value', array('Length' => array('max' => 255)));
+      ->setSetting('max_length', 255);
     $fields['signature_format'] = FieldDefinition::create('string')
       ->setLabel(t('Signature format'))
       ->setDescription(t('The signature format of this user.'));