diff --git a/core/modules/tracker/lib/Drupal/tracker/Tests/TrackerTest.php b/core/modules/tracker/lib/Drupal/tracker/Tests/TrackerTest.php
index 001de20..e924181 100644
--- a/core/modules/tracker/lib/Drupal/tracker/Tests/TrackerTest.php
+++ b/core/modules/tracker/lib/Drupal/tracker/Tests/TrackerTest.php
@@ -18,9 +18,13 @@ class TrackerTest extends WebTestBase {
   /**
    * Modules to enable.
    *
+   * The rdf module is enabled to ensure the rdf attributes are merged correctly
+   * when generating a page of tracked nodes for the site.
+   * @see tracker_page()
+   *
    * @var array
    */
-  public static $modules = array('comment', 'tracker', 'history');
+  public static $modules = array('comment', 'tracker', 'history', 'rdf');
 
   /**
    * The main user for testing.