diff --git a/core/modules/rdf/lib/Drupal/rdf/Tests/UserAttributesTest.php b/core/modules/rdf/lib/Drupal/rdf/Tests/UserAttributesTest.php
index 073490d..1839510 100644
--- a/core/modules/rdf/lib/Drupal/rdf/Tests/UserAttributesTest.php
+++ b/core/modules/rdf/lib/Drupal/rdf/Tests/UserAttributesTest.php
@@ -78,6 +78,7 @@ function testUserAttributesInMarkup() {
 
     // User 2 creates a node.
     $this->drupalLogin($user2);
+    $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
     $node = $this->drupalCreateNode(array('type' => 'article', 'promote' => 1));
     $this->drupalLogin($user1);
 
diff --git a/core/modules/system/lib/Drupal/system/Tests/System/DateTimeTest.php b/core/modules/system/lib/Drupal/system/Tests/System/DateTimeTest.php
index f00b5ba..d40e680 100644
--- a/core/modules/system/lib/Drupal/system/Tests/System/DateTimeTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/System/DateTimeTest.php
@@ -36,6 +36,7 @@ function setUp() {
     // Create admin user and log in admin user.
     $this->admin_user = $this->drupalCreateUser(array('administer site configuration'));
     $this->drupalLogin($this->admin_user);
+    $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
   }
 
   /**
diff --git a/core/modules/user/lib/Drupal/user/Tests/UserTimeZoneTest.php b/core/modules/user/lib/Drupal/user/Tests/UserTimeZoneTest.php
index 956a257..9fe4403 100644
--- a/core/modules/user/lib/Drupal/user/Tests/UserTimeZoneTest.php
+++ b/core/modules/user/lib/Drupal/user/Tests/UserTimeZoneTest.php
@@ -44,6 +44,7 @@ function testUserTimeZone() {
     $date2 = '2007-03-11 01:00:00 -0800';
     // One date in PDT (summer time):
     $date3 = '2007-03-20 21:00:00 -0700';
+    $this->drupalCreateContentType(array('type' => 'article', 'name' => 'Article'));
     $node1 = $this->drupalCreateNode(array('created' => strtotime($date1), 'type' => 'article'));
     $node2 = $this->drupalCreateNode(array('created' => strtotime($date2), 'type' => 'article'));
     $node3 = $this->drupalCreateNode(array('created' => strtotime($date3), 'type' => 'article'));