diff --git a/core/modules/user/lib/Drupal/user/Tests/Views/ArgumentDefaultTest.php b/core/modules/user/lib/Drupal/user/Tests/Views/ArgumentDefaultTest.php
index 24951e7..970e1c3 100644
--- a/core/modules/user/lib/Drupal/user/Tests/Views/ArgumentDefaultTest.php
+++ b/core/modules/user/lib/Drupal/user/Tests/Views/ArgumentDefaultTest.php
@@ -41,7 +41,7 @@ public function test_plugin_argument_default_current_user() {
     $view = views_get_view('test_plugin_argument_default_current_user');
     $view->initHandlers();
 
-    $this->assertEqual($view->argument['null']->get_default_argument(), $account->uid, 'Uid of the current user is used.');
+    $this->assertEqual($view->argument['null']->getDefaultArgument(), $account->uid, 'Uid of the current user is used.');
     // Switch back.
     $user = $admin;
     drupal_save_session(TRUE);
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/argument/ArgumentPluginBase.php b/core/modules/views/lib/Drupal/views/Plugin/views/argument/ArgumentPluginBase.php
index 117ade9..6014a84 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/argument/ArgumentPluginBase.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/argument/ArgumentPluginBase.php
@@ -741,7 +741,7 @@ function has_default_argument() {
   /**
    * Get a default argument, if available.
    */
-  function get_default_argument() {
+  public function getDefaultArgument() {
     $plugin = $this->get_plugin('argument_default');
     if ($plugin) {
       return $plugin->get_argument();
@@ -1015,7 +1015,7 @@ function get_value() {
     // processing the arguments.
     $argument = clone $this;
     if (!isset($arg) && $argument->has_default_argument()) {
-      $arg = $argument->get_default_argument();
+      $arg = $argument->getDefaultArgument();
 
       // remember that this argument was computed, not passed on the URL.
       $this->is_default = TRUE;
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/argument/Date.php b/core/modules/views/lib/Drupal/views/Plugin/views/argument/Date.php
index 6294ee3..c8eeb57 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/argument/Date.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/argument/Date.php
@@ -57,7 +57,7 @@ function default_argument_form(&$form, &$form_state) {
    * Set the empty argument value to the current date,
    * formatted appropriately for this argument.
    */
-  function get_default_argument($raw = FALSE) {
+  function getDefaultArgument($raw = FALSE) {
     if (!$raw && $this->options['default_argument_type'] == 'date') {
       return date($this->argFormat, REQUEST_TIME);
     }
@@ -74,7 +74,7 @@ function get_default_argument($raw = FALSE) {
       }
 
       if (empty($node)) {
-        return parent::get_default_argument();
+        return parent::getDefaultArgument();
       }
       elseif ($this->options['default_argument_type'] == 'node_created') {
         return date($this->argFormat, $node->created);
@@ -84,7 +84,7 @@ function get_default_argument($raw = FALSE) {
       }
     }
 
-    return parent::get_default_argument($raw);
+    return parent::getDefaultArgument($raw);
   }
 
   function get_sort_name() {
diff --git a/core/modules/views/lib/Drupal/views/Tests/Plugin/ArgumentDefaultTest.php b/core/modules/views/lib/Drupal/views/Tests/Plugin/ArgumentDefaultTest.php
index 312e5df..1f507b2 100644
--- a/core/modules/views/lib/Drupal/views/Tests/Plugin/ArgumentDefaultTest.php
+++ b/core/modules/views/lib/Drupal/views/Tests/Plugin/ArgumentDefaultTest.php
@@ -65,7 +65,7 @@ public function testArgumentDefaultPlugin() {
     $this->assertTrue($plugin instanceof ArgumentDefaultTestPlugin, 'The correct argument default plugin is used.');
 
     // Check that the value of the default argument is as expected.
-    $this->assertEqual($view->argument[$id]->get_default_argument(), 'John', 'The correct argument default value is returned.');
+    $this->assertEqual($view->argument[$id]->getDefaultArgument(), 'John', 'The correct argument default value is returned.');
     // Don't pass in a value for the default argument and make sure the query
     // just returns John.
     $this->executeView($view);
@@ -118,7 +118,7 @@ function testArgumentDefaultFixed() {
     $view->display_handler->overrideOption('arguments', $options);
     $view->initHandlers();
 
-    $this->assertEqual($view->argument['null']->get_default_argument(), $random, 'Fixed argument should be used by default.');
+    $this->assertEqual($view->argument['null']->getDefaultArgument(), $random, 'Fixed argument should be used by default.');
 
     // Make sure that a normal argument provided is used
     $random_string = $this->randomName();
diff --git a/core/modules/views/lib/Drupal/views/ViewExecutable.php b/core/modules/views/lib/Drupal/views/ViewExecutable.php
index a8a8dd2..c199615 100644
--- a/core/modules/views/lib/Drupal/views/ViewExecutable.php
+++ b/core/modules/views/lib/Drupal/views/ViewExecutable.php
@@ -883,7 +883,7 @@ protected function _buildArguments() {
 
       if (isset($arg) || $argument->has_default_argument()) {
         if (!isset($arg)) {
-          $arg = $argument->get_default_argument();
+          $arg = $argument->getDefaultArgument();
           // make sure default args get put back.
           if (isset($arg)) {
             $this->args[$position] = $arg;