diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/pager/PagerPluginBase.php b/core/modules/views/lib/Drupal/views/Plugin/views/pager/PagerPluginBase.php
index 49ef067..5591b14 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/pager/PagerPluginBase.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/pager/PagerPluginBase.php
@@ -77,7 +77,7 @@ function get_items_per_page() {
    *
    * This is mostly used for things that will override the value.
    */
-  function set_items_per_page($items) {
+  function setItemsPerPage($items) {
     $this->options['items_per_page'] = $items;
   }
 
diff --git a/core/modules/views/lib/Drupal/views/Tests/Plugin/PagerTest.php b/core/modules/views/lib/Drupal/views/Tests/Plugin/PagerTest.php
index 13d30ef..cd595b5 100644
--- a/core/modules/views/lib/Drupal/views/Tests/Plugin/PagerTest.php
+++ b/core/modules/views/lib/Drupal/views/Tests/Plugin/PagerTest.php
@@ -274,7 +274,7 @@ function testPagerApi() {
     $this->assertEqual($view->getItemsPerPage(), NULL, 'If the pager is not initialized and no manual override there is no items per page.');
     $rand_number = rand(1, 5);
     $view->setItemsPerPage($rand_number);
-    $this->assertEqual($view->getItemsPerPage(), $rand_number, 'Make sure get_items_per_page uses the settings of set_items_per_page.');
+    $this->assertEqual($view->getItemsPerPage(), $rand_number, 'Make sure get_items_per_page uses the settings of setItemsPerPage.');
 
     $this->assertEqual($view->getOffset(), NULL, 'If the pager is not initialized and no manual override there is no offset.');
     $rand_number = rand(1, 5);
@@ -297,8 +297,8 @@ function testPagerApi() {
     $rand_number = rand(1, 5);
     $view->setItemsPerPage($rand_number);
     $rand_number = rand(6, 11);
-    $view->pager->set_items_per_page($rand_number);
-    $this->assertEqual($view->getItemsPerPage(), $rand_number, 'Make sure get_items_per_page uses the settings of set_items_per_page.');
+    $view->pager->setItemsPerPage($rand_number);
+    $this->assertEqual($view->getItemsPerPage(), $rand_number, 'Make sure get_items_per_page uses the settings of setItemsPerPage.');
 
     $this->assertEqual($view->getOffset(), 0, 'Per default a view has a 0 offset.');
     $rand_number = rand(1, 5);
diff --git a/core/modules/views/lib/Drupal/views/ViewExecutable.php b/core/modules/views/lib/Drupal/views/ViewExecutable.php
index a8a8dd2..f1e8f0b 100644
--- a/core/modules/views/lib/Drupal/views/ViewExecutable.php
+++ b/core/modules/views/lib/Drupal/views/ViewExecutable.php
@@ -508,7 +508,7 @@ public function setItemsPerPage($items_per_page) {
 
     // If the pager is already initialized, pass it through to the pager.
     if (!empty($this->pager)) {
-      $this->pager->set_items_per_page($items_per_page);
+      $this->pager->setItemsPerPage($items_per_page);
     }
   }
 
@@ -759,7 +759,7 @@ public function initPager() {
       // These overrides may have been set earlier via $view->set_*
       // functions.
       if (isset($this->items_per_page)) {
-        $this->pager->set_items_per_page($this->items_per_page);
+        $this->pager->setItemsPerPage($this->items_per_page);
       }
 
       if (isset($this->offset)) {