diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/LanguageItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/LanguageItem.php
index 0b9bba9..e5f3f08 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/LanguageItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/LanguageItem.php
@@ -2,6 +2,7 @@
 
 namespace Drupal\Core\Field\Plugin\Field\FieldType;
 
+use Drupal\Core\Field\FieldDefinitionInterface;
 use Drupal\Core\Field\FieldStorageDefinitionInterface;
 use Drupal\Core\Field\FieldItemBase;
 use Drupal\Core\Language\LanguageInterface;
@@ -117,4 +118,12 @@ public function onChange($property_name, $notify = TRUE) {
     parent::onChange($property_name, $notify);
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public static function generateSampleValue(FieldDefinitionInterface $field_definition) {
+    $values['value'] = LanguageInterface::LANGCODE_NOT_SPECIFIED;
+    return $values;
+  }
+
 }
diff --git a/core/modules/aggregator/tests/src/Kernel/Views/AggregatorFeedViewsFieldAccessTest.php b/core/modules/aggregator/tests/src/Kernel/Views/AggregatorFeedViewsFieldAccessTest.php
index d0ca46e..9fa4496 100644
--- a/core/modules/aggregator/tests/src/Kernel/Views/AggregatorFeedViewsFieldAccessTest.php
+++ b/core/modules/aggregator/tests/src/Kernel/Views/AggregatorFeedViewsFieldAccessTest.php
@@ -34,6 +34,7 @@ public function testAggregatorFeedFields() {
       'title' => 'Drupal org',
       'url' => 'https://www.drupal.org/rss.xml',
       'link' => 'https://www.drupal.org/rss.xml',
+      'refresh' => 900,
     ]);
     $feed->save();
 
diff --git a/core/modules/comment/tests/src/Kernel/Views/CommentLinksTest.php b/core/modules/comment/tests/src/Kernel/Views/CommentLinksTest.php
index ffb91b0..08a326d 100644
--- a/core/modules/comment/tests/src/Kernel/Views/CommentLinksTest.php
+++ b/core/modules/comment/tests/src/Kernel/Views/CommentLinksTest.php
@@ -19,6 +19,13 @@
 class CommentLinksTest extends CommentViewsKernelTestBase {
 
   /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = ['entity_test'];
+
+  /**
    * Views used by this test.
    *
    * @var array
@@ -26,14 +33,26 @@ class CommentLinksTest extends CommentViewsKernelTestBase {
   public static $testViews = ['test_comment'];
 
   /**
+   * {@inheritdoc}
+   */
+  protected function setUp($import_test_views = TRUE) {
+    parent::setUp($import_test_views);
+
+    $this->installEntitySchema('entity_test');
+  }
+
+  /**
    * Test the comment approve link.
    */
   public function testLinkApprove() {
+    $host = EntityTest::create(['name' => $this->randomString()]);
+    $host->save();
 
     // Create an unapproved comment.
     $comment = $this->commentStorage->create([
       'uid' => $this->adminUser->id(),
       'entity_type' => 'entity_test',
+      'entity_id' => $host->id(),
       'comment_type' => 'entity_test',
       'status' => 0,
     ]);
@@ -91,8 +110,7 @@ public function testLinkApprove() {
    * Test the comment reply link.
    */
   public function testLinkReply() {
-    $this->enableModules(['field', 'entity_test']);
-    $this->installEntitySchema('entity_test');
+    $this->enableModules(['field']);
     $this->installSchema('comment', ['comment_entity_statistics']);
     $this->installConfig(['field']);
 
diff --git a/core/modules/comment/tests/src/Kernel/Views/CommentUserNameTest.php b/core/modules/comment/tests/src/Kernel/Views/CommentUserNameTest.php
index dae2c48..92112e4 100644
--- a/core/modules/comment/tests/src/Kernel/Views/CommentUserNameTest.php
+++ b/core/modules/comment/tests/src/Kernel/Views/CommentUserNameTest.php
@@ -4,6 +4,7 @@
 
 use Drupal\comment\Entity\Comment;
 use Drupal\Core\Session\AnonymousUserSession;
+use Drupal\entity_test\Entity\EntityTest;
 use Drupal\Tests\views\Kernel\ViewsKernelTestBase;
 use Drupal\user\Entity\Role;
 use Drupal\user\Entity\User;
@@ -36,6 +37,7 @@ protected function setUp($import_test_views = TRUE) {
 
     $this->installEntitySchema('user');
     $this->installEntitySchema('comment');
+    $this->installEntitySchema('entity_test');
     // Create the anonymous role.
     $this->installConfig(['user']);
 
@@ -67,12 +69,16 @@ protected function setUp($import_test_views = TRUE) {
     ]);
     $this->adminUser->save();
 
+    $host = EntityTest::create(['name' => $this->randomString()]);
+    $host->save();
+
     // Create some comments.
     $comment = Comment::create([
       'subject' => 'My comment title',
       'uid' => $this->adminUser->id(),
       'name' => $this->adminUser->label(),
       'entity_type' => 'entity_test',
+      'entity_id' => $host->id(),
       'comment_type' => 'entity_test',
       'status' => 1,
     ]);
@@ -85,6 +91,7 @@ protected function setUp($import_test_views = TRUE) {
       'mail' => 'test@example.com',
       'homepage' => 'https://example.com',
       'entity_type' => 'entity_test',
+      'entity_id' => $host->id(),
       'comment_type' => 'entity_test',
       'created' => 123456,
       'status' => 1,
diff --git a/core/modules/comment/tests/src/Kernel/Views/CommentViewsFieldAccessTest.php b/core/modules/comment/tests/src/Kernel/Views/CommentViewsFieldAccessTest.php
index f807c58..1ca5e43 100644
--- a/core/modules/comment/tests/src/Kernel/Views/CommentViewsFieldAccessTest.php
+++ b/core/modules/comment/tests/src/Kernel/Views/CommentViewsFieldAccessTest.php
@@ -3,6 +3,7 @@
 namespace Drupal\Tests\comment\Kernel\Views;
 
 use Drupal\comment\Entity\Comment;
+use Drupal\entity_test\Entity\EntityTest;
 use Drupal\user\Entity\User;
 use Drupal\Tests\views\Kernel\Handler\FieldFieldAccessTestBase;
 
@@ -25,6 +26,7 @@ protected function setUp($import_test_views = TRUE) {
     parent::setUp($import_test_views);
 
     $this->installEntitySchema('comment');
+    $this->installEntitySchema('entity_test');
   }
 
   /**
@@ -36,10 +38,14 @@ public function testCommentFields() {
     ]);
     $user->save();
 
+    $host = EntityTest::create(['name' => $this->randomString()]);
+    $host->save();
+
     $comment = Comment::create([
       'subject' => 'My comment title',
       'uid' => $user->id(),
       'entity_type' => 'entity_test',
+      'entity_id' => $host->id(),
       'comment_type' => 'entity_test',
     ]);
     $comment->save();
@@ -51,6 +57,7 @@ public function testCommentFields() {
       'mail' => 'test@example.com',
       'homepage' => 'https://example.com',
       'entity_type' => 'entity_test',
+      'entity_id' => $host->id(),
       'comment_type' => 'entity_test',
       'created' => 123456,
       'status' => 1,