diff --git a/core/modules/comment/lib/Drupal/comment/Entity/Comment.php b/core/modules/comment/lib/Drupal/comment/Entity/Comment.php
index 82a3dab..4b96220 100644
--- a/core/modules/comment/lib/Drupal/comment/Entity/Comment.php
+++ b/core/modules/comment/lib/Drupal/comment/Entity/Comment.php
@@ -280,7 +280,8 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
 
     $fields['status'] = FieldDefinition::create('boolean')
       ->setLabel(t('Publishing status'))
-      ->setDescription(t('A boolean indicating whether the comment is published.'));
+      ->setDescription(t('A boolean indicating whether the comment is published.'))
+      ->setSetting('default_value', TRUE);
 
     $fields['thread'] = FieldDefinition::create('string')
       ->setLabel(t('Thread place'))
diff --git a/core/modules/comment/lib/Drupal/comment/Tests/CommentBookTest.php b/core/modules/comment/lib/Drupal/comment/Tests/CommentBookTest.php
index a8847f4..4d92e9d 100644
--- a/core/modules/comment/lib/Drupal/comment/Tests/CommentBookTest.php
+++ b/core/modules/comment/lib/Drupal/comment/Tests/CommentBookTest.php
@@ -45,7 +45,6 @@ public function testBookCommentPrint() {
       'type' => 'book',
       'title' => 'Book title',
       'body' => 'Book body',
-      'status' => NODE_PUBLISHED,
     ));
     $book_node->book['bid'] = 'new';
     $book_node->save();
diff --git a/core/modules/node/lib/Drupal/node/Entity/Node.php b/core/modules/node/lib/Drupal/node/Entity/Node.php
index 3d6b87e..700d824 100644
--- a/core/modules/node/lib/Drupal/node/Entity/Node.php
+++ b/core/modules/node/lib/Drupal/node/Entity/Node.php
@@ -94,10 +94,6 @@ public function preSaveRevision(EntityStorageInterface $storage, \stdClass $reco
       if (!isset($record->log)) {
         $record->log = '';
       }
-      // Ensure we have a valid value for the revision author.
-      if (!isset($record->revision_uid)) {
-        $record->revision_uid = 0;
-      }
     }
     elseif (isset($this->original) && (!isset($record->log) || $record->log === '')) {
       // If we are updating an existing node without adding a new revision, we
@@ -399,6 +395,7 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
     $fields['status'] = FieldDefinition::create('boolean')
       ->setLabel(t('Publishing status'))
       ->setDescription(t('A boolean indicating whether the node is published.'))
+      ->setSetting('default_value', NODE_PUBLISHED)
       ->setRevisionable(TRUE)
       ->setTranslatable(TRUE);
 
@@ -436,7 +433,7 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
     $fields['revision_uid'] = FieldDefinition::create('entity_reference')
       ->setLabel(t('Revision user ID'))
       ->setDescription(t('The user ID of the author of the current revision.'))
-      ->setSettings(array('target_type' => 'user'))
+      ->setSettings(array('target_type' => 'user', 'default_value' => 0))
       ->setQueryable(FALSE)
       ->setRevisionable(TRUE);
 
diff --git a/core/modules/simpletest/lib/Drupal/simpletest/DrupalUnitTestBase.php b/core/modules/simpletest/lib/Drupal/simpletest/DrupalUnitTestBase.php
index 4ad2054..14c6a81 100644
--- a/core/modules/simpletest/lib/Drupal/simpletest/DrupalUnitTestBase.php
+++ b/core/modules/simpletest/lib/Drupal/simpletest/DrupalUnitTestBase.php
@@ -352,6 +352,8 @@ protected function installEntitySchema($entity_type_id) {
       foreach ($schema as $table_name => $table_schema) {
         $schema_handler->createTable($table_name, $table_schema);
       }
+      // TODO Refactor schema installation code in entity.module to make it reusable.
+      $this->container->get('module_handler')->invokeAll('entity_schema_installed', array(array($entity_type_id => $storage)));
       $this->pass(String::format('Installed entity type tables for the %entity_type entity type: %tables', array(
         '%entity_type' => $entity_type_id,
         '%tables' => '{' . implode('}, {', array_keys($schema)) . '}',
diff --git a/core/modules/user/lib/Drupal/user/Entity/User.php b/core/modules/user/lib/Drupal/user/Entity/User.php
index 3023e9f..d9a3545 100644
--- a/core/modules/user/lib/Drupal/user/Entity/User.php
+++ b/core/modules/user/lib/Drupal/user/Entity/User.php
@@ -507,6 +507,7 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
     $fields['status'] = FieldDefinition::create('boolean')
       ->setLabel(t('User status'))
       ->setDescription(t('Whether the user is active (1) or blocked (0).'))
+      // TODO This should be FALSE.
       ->setSetting('default_value', 1);
 
     $fields['created'] = FieldDefinition::create('created')
diff --git a/core/modules/user/lib/Drupal/user/Tests/UserInstallTest.php b/core/modules/user/lib/Drupal/user/Tests/UserInstallTest.php
index a21aaf1..a2f6c4a 100644
--- a/core/modules/user/lib/Drupal/user/Tests/UserInstallTest.php
+++ b/core/modules/user/lib/Drupal/user/Tests/UserInstallTest.php
@@ -37,6 +37,7 @@ public static function getInfo() {
    */
   protected function setUp() {
     parent::setUp();
+    $this->container->get('module_handler')->loadInclude('user', 'install');
     $this->installEntitySchema('user');
   }