diff --git a/core/modules/comment/comment.module b/core/modules/comment/comment.module
index b0f71f1..5b7d30a 100644
--- a/core/modules/comment/comment.module
+++ b/core/modules/comment/comment.module
@@ -954,7 +954,7 @@ function comment_links(Comment $comment, EntityInterface $node) {
   }
 
   // Add translations link for translation-enabled comment bundles.
-  if (module_exists('translation_entity') && translation_entity_translate_access($comment)) {
+  if (Drupal::moduleHandler()->moduleExists('translation_entity') && translation_entity_translate_access($comment)) {
     $links['comment-translations'] = array(
       'title' => t('translate'),
       'href' => 'comment/' . $comment->id() . '/translations',
@@ -1059,7 +1059,7 @@ function comment_form_node_type_form_alter(&$form, $form_state) {
       ),
     );
     // @todo Remove this check once language settings are generalized.
-    if (module_exists('translation_entity')) {
+    if (Drupal::moduleHandler()->moduleExists('translation_entity')) {
       $comment_form = $form;
       $comment_form_state['translation_entity']['key'] = 'language_configuration';
       $form['comment'] += translation_entity_enable_widget('comment', 'comment_node_' . $form['#node_type']->type, $comment_form, $comment_form_state);
@@ -1359,7 +1359,7 @@ function comment_load($cid, $reset = FALSE) {
 function comment_num_new($nid, $timestamp = 0) {
   global $user;
 
-  if ($user->uid && module_exists('history')) {
+  if ($user->uid && Drupal::moduleHandler()->moduleExists('history')) {
     // Retrieve the timestamp at which the current user last viewed this node.
     if (!$timestamp) {
       $timestamp = history_read($nid);
diff --git a/core/modules/comment/comment.pages.inc b/core/modules/comment/comment.pages.inc
index 9d7414b..74144cd 100644
--- a/core/modules/comment/comment.pages.inc
+++ b/core/modules/comment/comment.pages.inc
@@ -112,7 +112,7 @@ function comment_approve(Comment $comment) {
   // @todo CSRF tokens are validated in page callbacks rather than access
   //   callbacks, because access callbacks are also invoked during menu link
   //   generation. Add token support to routing: http://drupal.org/node/755584.
-  $token = drupal_container()->get('request')->query->get('token');
+  $token = Drupal::request()->query->get('token');
   if (!isset($token) || !drupal_valid_token($token, 'comment/' . $comment->id() . '/approve')) {
     throw new AccessDeniedHttpException();
   }
diff --git a/core/modules/comment/comment.views.inc b/core/modules/comment/comment.views.inc
index 7783334..e750dc7 100644
--- a/core/modules/comment/comment.views.inc
+++ b/core/modules/comment/comment.views.inc
@@ -141,7 +141,7 @@ function comment_views_data() {
     ),
   );
 
-  if (module_exists('language')) {
+  if (Drupal::moduleHandler()->moduleExists('language')) {
     $data['comment']['langcode'] = array(
       'title' => t('Language'),
       'help' => t('The language the comment is in.'),
diff --git a/core/modules/comment/lib/Drupal/comment/Plugin/views/field/NcsLastCommentName.php b/core/modules/comment/lib/Drupal/comment/Plugin/views/field/NcsLastCommentName.php
index 2853ad8..e0fc1fa 100644
--- a/core/modules/comment/lib/Drupal/comment/Plugin/views/field/NcsLastCommentName.php
+++ b/core/modules/comment/lib/Drupal/comment/Plugin/views/field/NcsLastCommentName.php
@@ -37,7 +37,7 @@ public function query() {
         )
       )
     );
-    $join = drupal_container()->get('plugin.manager.views.join')->createInstance('standard', $definition);
+    $join = \Drupal::service('plugin.manager.views.join')->createInstance('standard', $definition);
 
     // ncs_user alias so this can work with the sort handler, below.
     $this->user_table = $this->query->ensureTable('ncs_users', $this->relationship, $join);
diff --git a/core/modules/comment/lib/Drupal/comment/Plugin/views/sort/NcsLastCommentName.php b/core/modules/comment/lib/Drupal/comment/Plugin/views/sort/NcsLastCommentName.php
index f87203d..b430a3f 100644
--- a/core/modules/comment/lib/Drupal/comment/Plugin/views/sort/NcsLastCommentName.php
+++ b/core/modules/comment/lib/Drupal/comment/Plugin/views/sort/NcsLastCommentName.php
@@ -28,7 +28,7 @@ public function query() {
       'left_table' => $this->tableAlias,
       'left_field' => 'last_comment_uid',
     );
-    $join = drupal_container()->get('plugin.manager.views.join')->createInstance('standard', $definition);
+    $join = \Drupal::service('plugin.manager.views.join')->createInstance('standard', $definition);
 
     // @todo this might be safer if we had an ensure_relationship rather than guessing
     // the table alias. Though if we did that we'd be guessing the relationship name
diff --git a/core/modules/comment/lib/Drupal/comment/Tests/CommentFieldsTest.php b/core/modules/comment/lib/Drupal/comment/Tests/CommentFieldsTest.php
index ecd464a..6630ae9 100644
--- a/core/modules/comment/lib/Drupal/comment/Tests/CommentFieldsTest.php
+++ b/core/modules/comment/lib/Drupal/comment/Tests/CommentFieldsTest.php
@@ -73,7 +73,7 @@ function testCommentEnable() {
     $edit['modules[Core][comment][enable]'] = FALSE;
     $this->drupalPost('admin/modules', $edit, t('Save configuration'));
     $this->rebuildContainer();
-    $this->assertFalse(module_exists('comment'), 'Comment module disabled.');
+    $this->assertFalse(\Drupal::moduleHandler()->moduleExists('comment'), 'Comment module disabled.');
 
     // Enable core content type module (book).
     $edit = array();
@@ -85,7 +85,7 @@ function testCommentEnable() {
     $edit['modules[Core][comment][enable]'] = 'comment';
     $this->drupalPost('admin/modules', $edit, t('Save configuration'));
     $this->rebuildContainer();
-    $this->assertTrue(module_exists('comment'), 'Comment module enabled.');
+    $this->assertTrue(\Drupal::moduleHandler()->moduleExists('comment'), 'Comment module enabled.');
 
     // Create nodes of each type.
     $book_node = $this->drupalCreateNode(array('type' => 'book'));