diff --git a/core/modules/comment/comment.module b/core/modules/comment/comment.module
index df5f43f..44df6bc 100644
--- a/core/modules/comment/comment.module
+++ b/core/modules/comment/comment.module
@@ -533,7 +533,7 @@ function comment_node_view(EntityInterface $node, EntityDisplay $display, $view_
             'fragment' => 'comments',
             'html' => TRUE,
           );
-          if (module_exists('history')) {
+          if (Drupal::moduleHandler()->moduleExists('history')) {
             $links['comment-new-comments'] = array(
               'title' => '',
               'href' => '',
@@ -612,7 +612,7 @@ function comment_node_view(EntityInterface $node, EntityDisplay $display, $view_
       '#links' => $links,
       '#attributes' => array('class' => array('links', 'inline')),
     );
-    if ($view_mode == 'teaser' && module_exists('history')) {
+    if ($view_mode == 'teaser' && Drupal::moduleHandler()->moduleExists('history')) {
       $node->content['links']['#attached']['library'][] = array('comment', 'drupal.node-new-comments-link');
     }
 
@@ -630,7 +630,7 @@ function comment_node_view(EntityInterface $node, EntityDisplay $display, $view_
  * Implements hook_node_view_alter().
  */
 function comment_node_view_alter(&$build, EntityInterface $node, EntityDisplay $display) {
-  if (module_exists('history')) {
+  if (Drupal::moduleHandler()->moduleExists('history')) {
     $build['#attributes']['data-history-node-id'] = $node->id();
   }
 }
diff --git a/core/modules/comment/lib/Drupal/comment/CommentRenderController.php b/core/modules/comment/lib/Drupal/comment/CommentRenderController.php
index 71097b6..76fc0e6 100644
--- a/core/modules/comment/lib/Drupal/comment/CommentRenderController.php
+++ b/core/modules/comment/lib/Drupal/comment/CommentRenderController.php
@@ -73,7 +73,7 @@ public function buildContent(array $entities, array $displays, $view_mode, $lang
         $entity->content['#attached'] = array();
       }
       $entity->content['#attached']['library'][] = array('comment', 'drupal.comment-by-viewer');
-      if (module_exists('history') && $user->isAuthenticated()) {
+      if (Drupal::moduleHandler()->moduleExists('history') && $user->isAuthenticated()) {
         $entity->content['#attached']['library'][] = array('comment', 'drupal.comment-new-indicator');
       }
     }
diff --git a/core/modules/node/node.module b/core/modules/node/node.module
index 211cf82..a19c50f 100644
--- a/core/modules/node/node.module
+++ b/core/modules/node/node.module
@@ -589,7 +589,7 @@ function node_show(EntityInterface $node, $message = FALSE) {
 
   // Update the history table, stating that this user viewed this node.
   global $user;
-  if (module_exists('history') && $user->isAuthenticated()) {
+  if (Drupal::moduleHandler()->moduleExists('history') && $user->isAuthenticated()) {
     $page['#attached'] = array(
       'js' => array(
         // When the window's "load" event is triggered, mark the node as read.
diff --git a/core/modules/tracker/tracker.pages.inc b/core/modules/tracker/tracker.pages.inc
index 073151b..b102360 100644
--- a/core/modules/tracker/tracker.pages.inc
+++ b/core/modules/tracker/tracker.pages.inc
@@ -143,7 +143,7 @@ function tracker_page($account = NULL, $set_title = FALSE) {
   );
   $page['#sorted'] = TRUE;
 
-  if (module_exists('history') && $user->isAuthenticated()) {
+  if (Drupal::moduleHandler()->moduleExists('history') && $user->isAuthenticated()) {
     $page['#attached']['library'][] = array('tracker', 'drupal.tracker-history');
   }