diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/PasswordItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/PasswordItem.php
index 7de771a..687860c 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/PasswordItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/PasswordItem.php
@@ -63,4 +63,13 @@ public function preSave() {
       }
     }
   }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function isEmpty() {
+    $value = $this->get('value')->getValue();
+    return $value === NULL;
+  }
+
 }
diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItemBase.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItemBase.php
index 4772983..065310c 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItemBase.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/StringItemBase.php
@@ -40,4 +40,12 @@ public static function propertyDefinitions(FieldStorageDefinitionInterface $fiel
     return $properties;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function isEmpty() {
+    $value = $this->get('value')->getValue();
+    return $value === NULL || $value === '';
+  }
+
 }
diff --git a/core/modules/aggregator/src/Tests/FeedProcessorPluginTest.php b/core/modules/aggregator/src/Tests/FeedProcessorPluginTest.php
index 5142da5..2584021 100644
--- a/core/modules/aggregator/src/Tests/FeedProcessorPluginTest.php
+++ b/core/modules/aggregator/src/Tests/FeedProcessorPluginTest.php
@@ -47,9 +47,10 @@ public function testProcess() {
    */
   public function testDelete() {
     $feed = $this->createFeed();
+    $description = $feed->description->value ?: '';
     $this->updateAndDelete($feed, NULL);
     // Make sure the feed title is changed.
-    $entities = entity_load_multiple_by_properties('aggregator_feed', array('description' => $feed->description->value));
+    $entities = entity_load_multiple_by_properties('aggregator_feed', array('description' => $description));
     $this->assertTrue(empty($entities));
   }
 
diff --git a/core/modules/book/src/Tests/BookUninstallTest.php b/core/modules/book/src/Tests/BookUninstallTest.php
index c3739d8..2d2f7da 100644
--- a/core/modules/book/src/Tests/BookUninstallTest.php
+++ b/core/modules/book/src/Tests/BookUninstallTest.php
@@ -57,7 +57,7 @@ public function testBookUninstall() {
     $allowed_types[] = $content_type->id();
     $book_config->set('allowed_types', $allowed_types)->save();
 
-    $node = Node::create(array('type' => $content_type->id()));
+    $node = Node::create(array('title' => $this->randomString(), 'type' => $content_type->id()));
     $node->book['bid'] = 'new';
     $node->save();
 
@@ -65,7 +65,7 @@ public function testBookUninstall() {
     $validation_reasons = \Drupal::service('module_installer')->validateUninstall(['book']);
     $this->assertEqual(['To uninstall Book, delete all content that is part of a book'], $validation_reasons['book']);
 
-    $book_node = Node::create(array('type' => 'book'));
+    $book_node = Node::create(array('title' => $this->randomString(), 'type' => 'book'));
     $book_node->book['bid'] = FALSE;
     $book_node->save();
 
@@ -84,7 +84,7 @@ public function testBookUninstall() {
     $module_data = _system_rebuild_module_data();
     $this->assertFalse(isset($module_data['book']->info['required']), 'The book module is not required.');
 
-    $node = Node::create(array('type' => $content_type->id()));
+    $node = Node::create(array('title' => $this->randomString(), 'type' => $content_type->id()));
     $node->save();
     // One node exists but is not part of a book therefore the book module is
     // not required.
diff --git a/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentTest.php b/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentTest.php
index 19e74fe..80404bb 100644
--- a/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentTest.php
+++ b/core/modules/comment/src/Tests/Migrate/d6/MigrateCommentTest.php
@@ -44,6 +44,7 @@ protected function setUp() {
     $node = entity_create('node', array(
       'type' => 'story',
       'nid' => 1,
+      'title' => $this->randomString(),
     ));
     $node->enforceIsNew();
     $node->save();
diff --git a/core/modules/comment/src/Tests/Views/CommentUserNameTest.php b/core/modules/comment/src/Tests/Views/CommentUserNameTest.php
index f0ef7e6..cd7825a 100644
--- a/core/modules/comment/src/Tests/Views/CommentUserNameTest.php
+++ b/core/modules/comment/src/Tests/Views/CommentUserNameTest.php
@@ -50,6 +50,7 @@ protected function setUp($import_test_views = TRUE) {
     $storage
       ->create(array(
         'uid' => 0,
+        'name' => '',
         'status' => 0,
       ))
       ->save();
diff --git a/core/modules/content_translation/src/Tests/ContentTranslationMetadataFieldsTest.php b/core/modules/content_translation/src/Tests/ContentTranslationMetadataFieldsTest.php
index 437be68..adc965d 100644
--- a/core/modules/content_translation/src/Tests/ContentTranslationMetadataFieldsTest.php
+++ b/core/modules/content_translation/src/Tests/ContentTranslationMetadataFieldsTest.php
@@ -61,7 +61,7 @@ public function testSkipUntranslatable() {
 
     // Create a new test entity with original values in the default language.
     $default_langcode = $this->langcodes[0];
-    $entity_id = $this->createEntity([], $default_langcode);
+    $entity_id = $this->createEntity(['title' => $this->randomString(), ], $default_langcode);
     $storage = $entity_manager->getStorage($this->entityTypeId);
     $storage->resetCache();
     $entity = $storage->load($entity_id);
@@ -118,7 +118,7 @@ public function testSetTranslatable() {
 
     // Create a new test entity with original values in the default language.
     $default_langcode = $this->langcodes[0];
-    $entity_id = $this->createEntity(['status' => FALSE], $default_langcode);
+    $entity_id = $this->createEntity(['title' => $this->randomString(), 'status' => FALSE], $default_langcode);
     $storage = $entity_manager->getStorage($this->entityTypeId);
     $storage->resetCache();
     $entity = $storage->load($entity_id);
diff --git a/core/modules/contextual/src/Tests/ContextualDynamicContextTest.php b/core/modules/contextual/src/Tests/ContextualDynamicContextTest.php
index b8ed11c..38955ab 100644
--- a/core/modules/contextual/src/Tests/ContextualDynamicContextTest.php
+++ b/core/modules/contextual/src/Tests/ContextualDynamicContextTest.php
@@ -134,7 +134,7 @@ function testDifferentPermissions() {
     $this->assertResponse(403);
 
     // Verify that link language is properly handled.
-    $node3->addTranslation('it')->save();
+    $node3->addTranslation('it')->set('title', $this->randomString())->save();
     $id = 'node:node=' . $node3->id() . ':changed=' . $node3->getChangedTime() . '&langcode=it';
     $this->drupalGet('node', ['language' => ConfigurableLanguage::createFromLangcode('it')]);
     $this->assertContextualLinkPlaceHolder($id);
diff --git a/core/modules/file/src/Tests/Migrate/d6/MigrateUploadBase.php b/core/modules/file/src/Tests/Migrate/d6/MigrateUploadBase.php
index 17ea473..8305cf5 100644
--- a/core/modules/file/src/Tests/Migrate/d6/MigrateUploadBase.php
+++ b/core/modules/file/src/Tests/Migrate/d6/MigrateUploadBase.php
@@ -84,6 +84,7 @@ protected function setUp() {
         'type' => 'story',
         'nid' => $i,
         'vid' => array_shift($vids),
+        'title' => $this->randomString(),
       ));
       $node->enforceIsNew();
       $node->save();
diff --git a/core/modules/menu_link_content/src/Tests/Migrate/d6/MigrateMenuLinkTest.php b/core/modules/menu_link_content/src/Tests/Migrate/d6/MigrateMenuLinkTest.php
index cf21ebd..8f81b62 100644
--- a/core/modules/menu_link_content/src/Tests/Migrate/d6/MigrateMenuLinkTest.php
+++ b/core/modules/menu_link_content/src/Tests/Migrate/d6/MigrateMenuLinkTest.php
@@ -70,7 +70,7 @@ public function testMenuLinks() {
     $menu_link = entity_load('menu_link_content', 140);
     $this->assertIdentical('Drupal.org', $menu_link->getTitle());
     $this->assertIdentical('secondary-links', $menu_link->getMenuName());
-    $this->assertIdentical('', $menu_link->getDescription());
+    $this->assertIdentical(NULL, $menu_link->getDescription());
     $this->assertIdentical(TRUE, $menu_link->isEnabled());
     $this->assertIdentical(FALSE, $menu_link->isExpanded());
     $this->assertIdentical(['attributes' => ['title' => '']], $menu_link->link->options);
@@ -81,7 +81,7 @@ public function testMenuLinks() {
     $menu_link = entity_load('menu_link_content', 393);
     $this->assertIdentical('Test 3', $menu_link->getTitle());
     $this->assertIdentical('secondary-links', $menu_link->getMenuName());
-    $this->assertIdentical('', $menu_link->getDescription());
+    $this->assertIdentical(NULL, $menu_link->getDescription());
     $this->assertIdentical(TRUE, $menu_link->isEnabled());
     $this->assertIdentical(FALSE, $menu_link->isExpanded());
     $this->assertIdentical([], $menu_link->link->options);
diff --git a/core/modules/node/src/Tests/Migrate/d6/MigrateNodeTestBase.php b/core/modules/node/src/Tests/Migrate/d6/MigrateNodeTestBase.php
index f011a90..2e25140 100644
--- a/core/modules/node/src/Tests/Migrate/d6/MigrateNodeTestBase.php
+++ b/core/modules/node/src/Tests/Migrate/d6/MigrateNodeTestBase.php
@@ -82,6 +82,7 @@ protected function setUp() {
       'nid' => 1,
       'vid' => 1,
       'revision_log' => '',
+      'title' => $this->randomString(),
     ));
     $node->enforceIsNew();
     $node->save();
@@ -91,6 +92,7 @@ protected function setUp() {
       'nid' => 3,
       'vid' => 4,
       'revision_log' => '',
+      'title' => $this->randomString(),
     ));
     $node->enforceIsNew();
     $node->save();
diff --git a/core/modules/node/src/Tests/NodeAccessLanguageAwareCombinationTest.php b/core/modules/node/src/Tests/NodeAccessLanguageAwareCombinationTest.php
index 62a7b0c..d78c546 100644
--- a/core/modules/node/src/Tests/NodeAccessLanguageAwareCombinationTest.php
+++ b/core/modules/node/src/Tests/NodeAccessLanguageAwareCombinationTest.php
@@ -111,6 +111,7 @@ protected function setUp() {
       'private' => FALSE,
     ));
     $translation = $node->getTranslation('ca');
+    $translation->title = $this->randomString();
     $translation->field_private->value = 0;
     $node->save();
 
@@ -121,6 +122,7 @@ protected function setUp() {
       'private' => TRUE,
     ));
     $translation = $node->getTranslation('ca');
+    $translation->title = $this->randomString();
     $translation->field_private->value = 0;
     $node->save();
 
@@ -131,6 +133,7 @@ protected function setUp() {
       'private' => FALSE,
     ));
     $translation = $node->getTranslation('ca');
+    $translation->title = $this->randomString();
     $translation->field_private->value = 0;
     $node->save();
 
@@ -141,6 +144,7 @@ protected function setUp() {
       'private' => FALSE,
     ));
     $translation = $node->getTranslation('ca');
+    $translation->title = $this->randomString();
     $translation->field_private->value = 1;
     $node->save();
 
@@ -151,6 +155,7 @@ protected function setUp() {
       'private' => FALSE,
     ));
     $translation = $node->getTranslation('ca');
+    $translation->title = $this->randomString();
     $translation->field_private->value = 1;
     $node->save();
 
@@ -161,6 +166,7 @@ protected function setUp() {
       'private' => TRUE,
     ));
     $translation = $node->getTranslation('ca');
+    $translation->title = $this->randomString();
     $translation->field_private->value = 1;
     $node->save();
 
diff --git a/core/modules/node/src/Tests/NodeAccessLanguageAwareTest.php b/core/modules/node/src/Tests/NodeAccessLanguageAwareTest.php
index 1351617..f54476f 100644
--- a/core/modules/node/src/Tests/NodeAccessLanguageAwareTest.php
+++ b/core/modules/node/src/Tests/NodeAccessLanguageAwareTest.php
@@ -104,6 +104,7 @@ protected function setUp() {
       'field_private' => array(array('value' => 0)),
     ));
     $translation = $node->getTranslation('ca');
+    $translation->title = $this->randomString();
     $translation->field_private->value = 0;
     $node->save();
 
@@ -113,6 +114,7 @@ protected function setUp() {
       'field_private' => array(array('value' => 0)),
     ));
     $translation = $node->getTranslation('ca');
+    $translation->title = $this->randomString();
     $translation->field_private->value = 1;
     $node->save();
 
@@ -122,6 +124,7 @@ protected function setUp() {
       'field_private' => array(array('value' => 1)),
     ));
     $translation = $node->getTranslation('ca');
+    $translation->title = $this->randomString();
     $translation->field_private->value = 0;
     $node->save();
 
@@ -131,6 +134,7 @@ protected function setUp() {
       'field_private' => array(array('value' => 1)),
     ));
     $translation = $node->getTranslation('ca');
+    $translation->title = $this->randomString();
     $translation->field_private->value = 1;
     $node->save();
 
diff --git a/core/modules/node/src/Tests/NodeValidationTest.php b/core/modules/node/src/Tests/NodeValidationTest.php
index b38af1c..3a939c9 100644
--- a/core/modules/node/src/Tests/NodeValidationTest.php
+++ b/core/modules/node/src/Tests/NodeValidationTest.php
@@ -55,6 +55,11 @@ public function testValidation() {
     $this->assertEqual($violations[0]->getPropertyPath(), 'title');
     $this->assertEqual($violations[0]->getMessage(), 'This value should not be null.');
 
+    $node->set('title', "");
+    $violations = $node->validate();
+    $this->assertEqual(count($violations), 1, 'Violation found when title is not set.');
+    $this->assertEqual($violations[0]->getPropertyPath(), 'title');
+
     // Make the title valid again.
     $node->set('title', $this->randomString());
     // Save the node so that it gets an ID and a changed date.
diff --git a/core/modules/node/src/Tests/Views/NodeRevisionWizardTest.php b/core/modules/node/src/Tests/Views/NodeRevisionWizardTest.php
index 7e1209b..7f7ecdd 100644
--- a/core/modules/node/src/Tests/Views/NodeRevisionWizardTest.php
+++ b/core/modules/node/src/Tests/Views/NodeRevisionWizardTest.php
@@ -26,7 +26,7 @@ public function testViewAdd() {
     // Create two nodes with two revision.
     $node_storage = \Drupal::entityManager()->getStorage('node');
     /** @var \Drupal\node\NodeInterface $node */
-    $node = $node_storage->create(array('type' => 'article', 'created' => REQUEST_TIME + 40));
+    $node = $node_storage->create(array('title' => $this->randomString(), 'type' => 'article', 'created' => REQUEST_TIME + 40));
     $node->save();
 
     $node = $node->createDuplicate();
@@ -34,7 +34,7 @@ public function testViewAdd() {
     $node->created->value = REQUEST_TIME + 20;
     $node->save();
 
-    $node = $node_storage->create(array('type' => 'article', 'created' => REQUEST_TIME + 30));
+    $node = $node_storage->create(array('title' => $this->randomString(), 'type' => 'article', 'created' => REQUEST_TIME + 30));
     $node->save();
 
     $node = $node->createDuplicate();
diff --git a/core/modules/options/src/Tests/Views/OptionsTestBase.php b/core/modules/options/src/Tests/Views/OptionsTestBase.php
index e203c50..fbe13b1 100644
--- a/core/modules/options/src/Tests/Views/OptionsTestBase.php
+++ b/core/modules/options/src/Tests/Views/OptionsTestBase.php
@@ -56,6 +56,7 @@ protected function setUp() {
 
     $settings = [];
     $settings['type'] = 'article';
+    $settings['title'] = $this->randomString();
     $settings['field_test_list_string'][]['value'] = $this->fieldValues[0];
     $settings['field_test_list_integer'][]['value'] = 0;
 
diff --git a/core/modules/shortcut/src/Entity/Shortcut.php b/core/modules/shortcut/src/Entity/Shortcut.php
index 108bbc9..ba6af78 100644
--- a/core/modules/shortcut/src/Entity/Shortcut.php
+++ b/core/modules/shortcut/src/Entity/Shortcut.php
@@ -132,7 +132,6 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setDescription(t('The name of the shortcut.'))
       ->setRequired(TRUE)
       ->setTranslatable(TRUE)
-      ->setDefaultValue('')
       ->setSetting('max_length', 255)
       ->setDisplayOptions('form', array(
         'type' => 'string_textfield',
diff --git a/core/modules/system/src/Tests/Entity/EntityFieldTest.php b/core/modules/system/src/Tests/Entity/EntityFieldTest.php
index 308132d..5414730 100644
--- a/core/modules/system/src/Tests/Entity/EntityFieldTest.php
+++ b/core/modules/system/src/Tests/Entity/EntityFieldTest.php
@@ -677,6 +677,7 @@ public function testEntityConstraintValidation() {
     $node = entity_create('node', array(
       'type' => 'page',
       'uid' => $user->id(),
+      'title' => $this->randomString(),
     ));
     $reference->setValue($node);
     $violations = $reference->validate();
@@ -699,6 +700,7 @@ public function testEntityConstraintValidation() {
     $node = entity_create('node', array(
       'type' => 'article',
       'uid' => $user->id(),
+      'title' => $this->randomString(),
     ));
     $node->save();
     $reference->setValue($node);
diff --git a/core/modules/system/src/Tests/Entity/EntityTranslationFormTest.php b/core/modules/system/src/Tests/Entity/EntityTranslationFormTest.php
index fc5c892..4ff9f22 100644
--- a/core/modules/system/src/Tests/Entity/EntityTranslationFormTest.php
+++ b/core/modules/system/src/Tests/Entity/EntityTranslationFormTest.php
@@ -106,6 +106,7 @@ function testEntityFormLanguage() {
 
     // Create a body translation and check the form language.
     $langcode2 = $this->langcodes[1];
+    $node->getTranslation($langcode2)->title->value = $this->randomString();
     $node->getTranslation($langcode2)->body->value = $this->randomMachineName(16);
     $node->getTranslation($langcode2)->setOwnerId($web_user->id());
     $node->save();
diff --git a/core/modules/system/src/Tests/Module/UninstallTest.php b/core/modules/system/src/Tests/Module/UninstallTest.php
index 4f5e193..4b8df60 100644
--- a/core/modules/system/src/Tests/Module/UninstallTest.php
+++ b/core/modules/system/src/Tests/Module/UninstallTest.php
@@ -51,7 +51,7 @@ function testUninstallPage() {
     $node_type->setThirdPartySetting('module_test', 'key', 'value');
     $node_type->save();
     // Add a node to prevent node from being uninstalled.
-    $node = entity_create('node', array('type' => 'uninstall_blocker'));
+    $node = entity_create('node', array('type' => 'uninstall_blocker', 'title' => $this->randomString()));
     $node->save();
 
     $this->drupalGet('admin/modules/uninstall');
diff --git a/core/modules/user/src/Entity/User.php b/core/modules/user/src/Entity/User.php
index 53155a0..942da3d 100644
--- a/core/modules/user/src/Entity/User.php
+++ b/core/modules/user/src/Entity/User.php
@@ -463,13 +463,15 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
     $fields['name'] = BaseFieldDefinition::create('string')
       ->setLabel(t('Name'))
       ->setDescription(t('The name of this user.'))
-      ->setDefaultValue('')
       ->setConstraints(array(
         // No Length constraint here because the UserName constraint also covers
         // that.
         'UserName' => array(),
         'UserNameUnique' => array(),
       ));
+    $user_name_item_definition = $fields['name']->getItemDefinition();
+    $user_name_item_definition->setClass('\Drupal\user\UserNameItem');
+    $fields['name']->setItemDefinition($user_name_item_definition);
 
     $fields['pass'] = BaseFieldDefinition::create('password')
       ->setLabel(t('Password'))
diff --git a/core/modules/user/src/Tests/Condition/UserRoleConditionTest.php b/core/modules/user/src/Tests/Condition/UserRoleConditionTest.php
index 567ae06..ef92e11 100644
--- a/core/modules/user/src/Tests/Condition/UserRoleConditionTest.php
+++ b/core/modules/user/src/Tests/Condition/UserRoleConditionTest.php
@@ -88,6 +88,7 @@ protected function setUp() {
 
     // Setup an anonymous user for our tests.
     $this->anonymous = User::create(array(
+      'name' => '',
       'uid' => 0,
     ));
     $this->anonymous->save();
diff --git a/core/modules/user/src/Tests/UserRoleDeleteTest.php b/core/modules/user/src/Tests/UserRoleDeleteTest.php
index 9975046..81396ac 100644
--- a/core/modules/user/src/Tests/UserRoleDeleteTest.php
+++ b/core/modules/user/src/Tests/UserRoleDeleteTest.php
@@ -42,8 +42,9 @@ public function testRoleDeleteUserRoleReferenceDelete() {
 
     // Create user and assign both test roles.
     $values = array(
-        'uid' => 1,
-        'roles' => array('test_role_one', 'test_role_two'),
+      'uid' => 1,
+      'name' => $this->randomString(),
+      'roles' => array('test_role_one', 'test_role_two'),
     );
     $user = User::create($values);
     $user->save();
diff --git a/core/modules/user/src/Tests/Views/UserUnitTestBase.php b/core/modules/user/src/Tests/Views/UserUnitTestBase.php
index 433719f..309d4d8 100644
--- a/core/modules/user/src/Tests/Views/UserUnitTestBase.php
+++ b/core/modules/user/src/Tests/Views/UserUnitTestBase.php
@@ -74,7 +74,7 @@ protected function setupPermissionTestData() {
     user_role_grant_permissions('multiple_permissions', array('administer permissions', 'administer users', 'access user profiles'));
 
     // Setup a user without an extra role.
-    $this->users[] = $account = $this->userStorage->create(array());
+    $this->users[] = $account = $this->userStorage->create(['name' => $this->randomString()]);
     $account->save();
     // Setup a user with just the first role (so no permission beside the
     // ones from the authenticated role).
diff --git a/core/modules/user/src/UserNameItem.php b/core/modules/user/src/UserNameItem.php
new file mode 100644
index 0000000..1f66bce
--- /dev/null
+++ b/core/modules/user/src/UserNameItem.php
@@ -0,0 +1,29 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\user\UserNameItem.
+ */
+
+namespace Drupal\user;
+
+use Drupal\Core\Field\Plugin\Field\FieldType\StringItem;
+
+/**
+ * Defines a custom 'string' field type class for the 'name' user entity field.
+ */
+class UserNameItem extends StringItem {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function isEmpty() {
+    // Anonymous users do not store anything in the database.
+    if ($this->getEntity()->id() === 0) {
+      return $this->value === NULL;
+    }
+
+    return $this->value === NULL || $this->value === '';
+  }
+
+}
diff --git a/core/modules/user/user.install b/core/modules/user/user.install
index dd55b49..91a908e 100644
--- a/core/modules/user/user.install
+++ b/core/modules/user/user.install
@@ -70,6 +70,7 @@ function user_install() {
     ->create(array(
       'uid' => 0,
       'status' => 0,
+      'name' => '',
     ))
     ->save();
 
diff --git a/core/modules/views/src/Tests/Entity/FieldEntityTest.php b/core/modules/views/src/Tests/Entity/FieldEntityTest.php
index 7790bd5..925ed10 100644
--- a/core/modules/views/src/Tests/Entity/FieldEntityTest.php
+++ b/core/modules/views/src/Tests/Entity/FieldEntityTest.php
@@ -57,7 +57,7 @@ public function testGetEntity() {
     $account = entity_create('user', array('name' => $this->randomMachineName(), 'bundle' => 'user'));
     $account->save();
 
-    $node = entity_create('node', array('uid' => $account->id(), 'type' => 'page'));
+    $node = entity_create('node', array('uid' => $account->id(), 'type' => 'page', 'title' => $this->randomString()));
     $node->save();
     $comment = entity_create('comment', array(
       'uid' => $account->id(),
diff --git a/core/modules/views/src/Tests/Entity/FilterEntityBundleTest.php b/core/modules/views/src/Tests/Entity/FilterEntityBundleTest.php
index 808c8a4..9be30df 100644
--- a/core/modules/views/src/Tests/Entity/FilterEntityBundleTest.php
+++ b/core/modules/views/src/Tests/Entity/FilterEntityBundleTest.php
@@ -60,7 +60,7 @@ protected function setUp() {
 
     foreach ($this->entityBundles as $key => $info) {
       for ($i = 0; $i < 5; $i++) {
-        $entity = entity_create('node', array('label' => $this->randomMachineName(), 'uid' => 1, 'type' => $key));
+        $entity = entity_create('node', array('title' => $this->randomString(), 'uid' => 1, 'type' => $key));
         $entity->save();
         $this->entities[$key][$entity->id()] = $entity;
         $this->entities['count']++;
diff --git a/core/modules/views/src/Tests/Handler/FieldFieldTest.php b/core/modules/views/src/Tests/Handler/FieldFieldTest.php
index 5993385..7e0d456 100644
--- a/core/modules/views/src/Tests/Handler/FieldFieldTest.php
+++ b/core/modules/views/src/Tests/Handler/FieldFieldTest.php
@@ -74,7 +74,7 @@ protected function setUp() {
     $this->installEntitySchema('entity_test_rev');
 
     // Bypass any field access.
-    $this->adminUser = User::create();
+    $this->adminUser = User::create(['name' => $this->randomString()]);
     $this->adminUser->save();
     $this->container->get('current_user')->setAccount($this->adminUser);