diff --git a/core/lib/Drupal/Core/TypedData/DataDefinition.php b/core/lib/Drupal/Core/TypedData/DataDefinition.php
index b9e17f2409..a0206b0e4a 100644
--- a/core/lib/Drupal/Core/TypedData/DataDefinition.php
+++ b/core/lib/Drupal/Core/TypedData/DataDefinition.php
@@ -363,7 +363,7 @@ public function __sleep() {
    * @return static
    *   The object itself for chaining.
    */
-  public function setInternal($internal = TRUE) {
+  public function setInternal($internal) {
     $this->definition['internal'] = $internal;
     return $this;
   }
diff --git a/core/modules/rest/tests/src/Functional/EntityResource/EntityTest/EntityTestJsonInternalPropertyNormalizerTest.php b/core/modules/rest/tests/src/Functional/EntityResource/EntityTest/EntityTestJsonInternalPropertyNormalizerTest.php
index 4b7fac4567..4585da79b3 100644
--- a/core/modules/rest/tests/src/Functional/EntityResource/EntityTest/EntityTestJsonInternalPropertyNormalizerTest.php
+++ b/core/modules/rest/tests/src/Functional/EntityResource/EntityTest/EntityTestJsonInternalPropertyNormalizerTest.php
@@ -30,7 +30,7 @@ class EntityTestJsonInternalPropertyNormalizerTest extends EntityTestResourceTes
    */
   protected function getExpectedNormalizedEntity() {
     $expected = parent::getExpectedNormalizedEntity();
-    // The 'internal_value' property in test field type will not be returned in
+    // The 'internal_value' property in test field type is not exposed in the
     // normalization because setInternal(FALSE) was not called for this
     // property.
     // @see \Drupal\entity_test\Plugin\Field\FieldType\InternalPropertyTestFieldItem::propertyDefinitions