diff --git a/core/modules/comment/comment.admin.inc b/core/modules/comment/comment.admin.inc
index 488c2f9..d288830 100644
--- a/core/modules/comment/comment.admin.inc
+++ b/core/modules/comment/comment.admin.inc
@@ -19,7 +19,7 @@
  * @see comment_multiple_delete_confirm()
  */
 function comment_admin($type = 'new') {
-  $edit = $_POST;
+  $edit = Drupal::request()->request->all();
 
   if (isset($edit['operation']) && ($edit['operation'] == 'delete') && isset($edit['comments']) && $edit['comments']) {
     return drupal_get_form('comment_multiple_delete_confirm');
diff --git a/core/modules/comment/comment.module b/core/modules/comment/comment.module
index 0c2cd55..bbe07ff 100644
--- a/core/modules/comment/comment.module
+++ b/core/modules/comment/comment.module
@@ -434,7 +434,7 @@ function comment_permalink(Comment $comment) {
     $subrequest = Request::create('/node/' . $node->nid, 'GET', $request->query->all(), $request->cookies->all(), array(), $request->server->all());
     $subrequest->query->set('page', $page);
     // @todo: Convert the pager to use the request object.
-    $_GET['page'] = $page;
+    Drupal::request()->query->set('page', $page);
     return drupal_container()->get('http_kernel')->handle($subrequest, HttpKernelInterface::SUB_REQUEST);
   }
   throw new NotFoundHttpException();
diff --git a/core/modules/comment/comment.pages.inc b/core/modules/comment/comment.pages.inc
index 5e1b190..9dc09f7 100644
--- a/core/modules/comment/comment.pages.inc
+++ b/core/modules/comment/comment.pages.inc
@@ -37,7 +37,7 @@
 function comment_reply(EntityInterface $node, $pid = NULL) {
   // Set the breadcrumb trail.
   drupal_set_breadcrumb(array(l(t('Home'), NULL), l($node->label(), 'node/' . $node->nid)));
-  $op = isset($_POST['op']) ? $_POST['op'] : '';
+  $op = Drupal::request()->request->get('op');
   $build = array();
 
   // The user is previewing a comment prior to submitting it.