diff -u b/core/modules/node/node.module b/core/modules/node/node.module
--- b/core/modules/node/node.module
+++ b/core/modules/node/node.module
@@ -383,7 +383,7 @@
 }
 
 /**
- * Configures the authored on and authored by base field for a node type.
+ * Configures the authored on and authored by base fields for a node type.
  *
  * @param \Drupal\node\NodeTypeInterface $type
  *   A node type object.
@@ -407,11 +407,11 @@
     // Try loading the display from configuration.
     $display = EntityViewDisplay::load('node.' . $type->id() . '.' . $view_mode_name);
 
-    // If not found, create a fresh display object. We do not preemptively create
-    // new entity_view_display configuration entries for each existing entity type
-    // and bundle whenever a new view mode becomes available. Instead,
-    // configuration entries are only created when a display object is explicitly
-    // configured and saved.
+    // If not found, create a fresh display object. We do not preemptively
+    // create new entity_view_display configuration entries for each existing
+    // entity type and bundle whenever a new view mode becomes available.
+    // Instead, configuration entries are only created when a display object is
+    // explicitly configured and saved.
     if (!$display) {
       $display = EntityViewDisplay::create([
         'targetEntityType' => 'node',
diff -u b/core/modules/node/tests/src/Functional/NodeCreationTest.php b/core/modules/node/tests/src/Functional/NodeCreationTest.php
--- b/core/modules/node/tests/src/Functional/NodeCreationTest.php
+++ b/core/modules/node/tests/src/Functional/NodeCreationTest.php
@@ -73,6 +73,7 @@
     // creation date.
     $node_type = NodeType::load('page');
     $node_type->setDisplaySubmitted(TRUE);
+    $node_type->save();
 
     // Verify that pages do show submitted information after requiring them.
     $this->drupalGet('node/' . $node->id());
reverted:
--- b/core/tests/Drupal/KernelTests/Config/DefaultConfigTest.php
+++ a/core/tests/Drupal/KernelTests/Config/DefaultConfigTest.php
@@ -95,10 +95,10 @@
     foreach ($optional_config_storage->listAll() as $config_name) {
       $data = $optional_config_storage->read($config_name);
       if (isset($data['dependencies']['module'])) {
+        $modules_to_install = array_merge($modules_to_install, $data['dependencies']['module']);
-        $modules_to_install = array_merge($data['dependencies']['module'], $modules_to_install);
       }
       if (isset($data['dependencies']['theme'])) {
+        $themes_to_install = array_merge($themes_to_install, $data['dependencies']['theme']);
-        $themes_to_install = array_merge($data['dependencies']['theme'], $themes_to_install);
       }
     }
     $module_installer->install(array_unique($modules_to_install));
only in patch2:
unchanged:
--- a/core/modules/node/content_types.js
+++ b/core/modules/node/content_types.js
@@ -45,17 +45,6 @@
 
         return vals.join(', ');
       });
-      $context.find('#edit-display').drupalSetSummary(function (context) {
-        var vals = [];
-        var $editContext = $(context);
-        $editContext.find('input:checked').next('label').each(function () {
-          vals.push(Drupal.checkPlain($(this).text()));
-        });
-        if (!$editContext.find('#edit-display-submitted').is(':checked')) {
-          vals.unshift(Drupal.t("Don't display post information"));
-        }
-        return vals.join(', ');
-      });
     }
   };
 
only in patch2:
unchanged:
--- a/core/modules/node/tests/src/Functional/NodePostSettingsTest.php
+++ b/core/modules/node/tests/src/Functional/NodePostSettingsTest.php
@@ -1,6 +1,7 @@
 <?php
 
 namespace Drupal\Tests\node\Functional;
+use Drupal\node\Entity\NodeType;
 
 /**
  * Tests that the post information (submitted by Username on date) text displays
@@ -23,9 +24,9 @@ protected function setUp() {
   public function testPagePostInfo() {
 
     // Set "Basic page" content type to display post information.
-    $edit = [];
-    $edit['display_submitted'] = TRUE;
-    $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
+    $page_type = NodeType::load('page');
+    $page_type->setDisplaySubmitted(TRUE);
+    $page_type->save();
 
     // Create a node.
     $edit = [];
@@ -40,9 +41,8 @@ public function testPagePostInfo() {
     $node->delete();
 
     // Set "Basic page" content type to display post information.
-    $edit = [];
-    $edit['display_submitted'] = FALSE;
-    $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
+    $page_type->setDisplaySubmitted(FALSE);
+    $page_type->save();
 
     // Create a node.
     $edit = [];
only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/system/src/Tests/Update/UpdateNodeTypeTest.php
@@ -0,0 +1,74 @@
+<?php
+
+namespace Drupal\system\Tests\Update;
+
+use Drupal\node\Entity\NodeType;
+
+/**
+ * Tests the Node Type update path.
+ *
+ * @group Update
+ */
+class UpdateNodeTypeTest extends UpdatePathTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setDatabaseDumpFiles() {
+    $this->databaseDumpFiles = [
+      __DIR__ . '/../../../../system/tests/fixtures/update/drupal-8.bare.standard.php.gz',
+    ];
+  }
+
+  /**
+   * Tests that authored on / by base fields are created correctly.
+   */
+  public function testNodeTypeSetDisplaySubmitted() {
+    // First, let's confirm that the article node type displays the
+    // authored by / on information.
+    $article_type = NodeType::load('article');
+    $this->assertTrue($article_type->displaySubmitted(), t('The node type article displays the content author and creation date.'));
+
+    // Confirm that the current article view modes don't have the
+    // authored on / by base fields configuration.
+    foreach (['teaser', 'default'] as $view_mode) {
+      $config = $this->config('core.entity_view_display.node.article.' . $view_mode)->get('data');
+      $this->assertFalse(isset($config['content']['created']), t('The authored on (created) base field does not exist in the article !view_mode view mode.', array('!view_mode' => $view_mode)));
+      $this->assertFalse(isset($config['content']['uid']), t('The authored by (uid) base field does not exist in the article !view_mode view mode.', array('!view_mode' => $view_mode)));
+    }
+
+    // Second, let's confirm that the page node type doesn't display the
+    // authored by / on information.
+    $page_type = NodeType::load('page');
+    $this->assertFalse($page_type->displaySubmitted(), t('The node type page does not display the content author and creation date.'));
+
+    // Confirm that the current page view modes don't have the
+    // authored on / by base fields configuration.
+    foreach (['teaser', 'default'] as $view_mode) {
+      $config = $this->config('core.entity_view_display.node.page.' . $view_mode)->get('data');
+      $this->assertFalse(isset($config['content']['created']), t('The authored on (created) base field does not exist in the page !view_mode view mode.', array('!view_mode' => $view_mode)));
+      $this->assertFalse(isset($config['content']['uid']), t('The authored by (uid) base field does not exist in the page !view_mode view mode.', array('!view_mode' => $view_mode)));
+    }
+
+    $this->runUpdates();
+
+    // Confirm that the updates added the authored on / by base fields to the
+    // view mode configuration.
+    foreach (['teaser', 'default'] as $view_mode) {
+      $config = $this->config('core.entity_view_display.node.article.' . $view_mode)->get('data');
+      $this->assertTrue(isset($config['content']['created']), t('The authored on (created) base field exists in the article !view_mode view mode.', array('!view_mode' => $view_mode)));
+      $this->assertTrue(isset($config['content']['uid']), t('The authored by (uid) base field exists in the article !view_mode view mode.', array('!view_mode' => $view_mode)));
+      $this->assertEqual($config['content']['created']['region'], 'content', t('The authored on (created) base field appears in the content region of the article !view_mode view mode.', array('!view_mode' => $view_mode)));
+      $this->assertEqual($config['content']['uid']['region'], 'content', t('The authored by (uid) base field appears in the content region of the article !view_mode view mode.', array('!view_mode' => $view_mode)));
+    }
+    // Confirm that the updates added the authored on / by base fields to the
+    // view mode configuration.
+    foreach (['teaser', 'default'] as $view_mode) {
+      $config = $this->config('core.entity_view_display.node.page.' . $view_mode)->get('data');
+      $this->assertTrue(isset($config['content']['created']), t('The authored on (created) base field exists in the page !view_mode view mode.', array('!view_mode' => $view_mode)));
+      $this->assertTrue(isset($config['content']['uid']), t('The authored by (uid) base field exists in the page !view_mode view mode.', array('!view_mode' => $view_mode)));
+      $this->assertTrue($config['hidden']['created'], t('The authored on (created) base field is hidden in the page !view_mode view mode.', array('!view_mode' => $view_mode)));
+      $this->assertTrue($config['hidden']['uid'], t('The authored by (uid) base field is hidden in the page !view_mode view mode.', array('!view_mode' => $view_mode)));
+    }
+  }
+}