diff --git a/core/modules/views/config/views.view.archive.yml b/core/modules/views/config/views.view.archive.yml
index 3cba318..03d1307 100644
--- a/core/modules/views/config/views.view.archive.yml
+++ b/core/modules/views/config/views.view.archive.yml
@@ -80,7 +80,7 @@ display:
           default_argument_type: fixed
           summary:
             sort_order: desc
-            format: default_summary
+            format: defaultSummary
           summary_options:
             override: '1'
             items_per_page: '30'
@@ -148,7 +148,7 @@ display:
           title: '%1'
           default_argument_type: fixed
           summary:
-            format: default_summary
+            format: defaultSummary
           summary_options:
             items_per_page: '30'
           specify_validation: '1'
diff --git a/core/modules/views/config/views.view.backlinks.yml b/core/modules/views/config/views.view.backlinks.yml
index 311d5f5..d1c3d03 100644
--- a/core/modules/views/config/views.view.backlinks.yml
+++ b/core/modules/views/config/views.view.backlinks.yml
@@ -126,7 +126,7 @@ display:
           title: 'Pages that link to %1'
           default_argument_type: fixed
           summary:
-            format: default_summary
+            format: defaultSummary
           specify_validation: '1'
           validate:
             type: node
@@ -203,7 +203,7 @@ display:
           title: 'What links here'
           default_argument_type: node
           summary:
-            format: default_summary
+            format: defaultSummary
           specify_validation: '1'
           validate:
             type: node
diff --git a/core/modules/views/config/views.view.glossary.yml b/core/modules/views/config/views.view.glossary.yml
index 8237f1f..c5e3374 100644
--- a/core/modules/views/config/views.view.glossary.yml
+++ b/core/modules/views/config/views.view.glossary.yml
@@ -221,7 +221,7 @@ display:
           default_argument_options:
             argument: a
           summary:
-            format: default_summary
+            format: defaultSummary
           specify_validation: '1'
           glossary: '1'
           limit: '1'
diff --git a/core/modules/views/config/views.view.taxonomy_term.yml b/core/modules/views/config/views.view.taxonomy_term.yml
index 850909b..0146907 100644
--- a/core/modules/views/config/views.view.taxonomy_term.yml
+++ b/core/modules/views/config/views.view.taxonomy_term.yml
@@ -90,7 +90,7 @@ display:
           title: '%1'
           default_argument_type: fixed
           summary:
-            format: default_summary
+            format: defaultSummary
           specify_validation: '1'
           validate:
             type: taxonomy_term
@@ -116,7 +116,7 @@ display:
             title_enable: '1'
           default_argument_type: fixed
           summary:
-            format: default_summary
+            format: defaultSummary
           specify_validation: '1'
           plugin_id: taxonomy_index_tid_depth_modifier
           relationship: none
diff --git a/core/modules/views/config/views.view.tracker.yml b/core/modules/views/config/views.view.tracker.yml
index 1e245016..50d7323 100644
--- a/core/modules/views/config/views.view.tracker.yml
+++ b/core/modules/views/config/views.view.tracker.yml
@@ -463,7 +463,7 @@ display:
           title: 'Recent posts for %1'
           default_argument_type: fixed
           summary:
-            format: default_summary
+            format: defaultSummary
           specify_validation: '1'
           plugin_id: argument_comment_user_uid
           relationship: none
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/area/Result.php b/core/modules/views/lib/Drupal/views/Plugin/views/area/Result.php
index 81f6e85..fe5a499 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/area/Result.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/area/Result.php
@@ -59,7 +59,7 @@ public function buildOptionsForm(&$form, &$form_state) {
    */
   function render($empty = FALSE) {
     // Must have options and does not work on summaries.
-    if (!isset($this->options['content']) || $this->view->plugin_name == 'default_summary') {
+    if (!isset($this->options['content']) || $this->view->plugin_name == 'defaultSummary') {
       return array();
     }
     $output = '';
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..7e56568 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
@@ -145,7 +145,7 @@ protected function defineOptions() {
       'contains' => array(
         'sort_order' => array('default' => 'asc'),
         'number_of_records' => array('default' => 0),
-        'format' => array('default' => 'default_summary'),
+        'format' => array('default' => 'defaultSummary'),
       ),
     );
     $options['specify_validation'] = array('default' => FALSE, 'bool' => TRUE);
@@ -462,8 +462,8 @@ function default_actions($which = NULL) {
       ),
       'summary' => array(
         'title' => t('Display a summary'),
-        'method' => 'default_summary',
-        'form method' => 'default_summary_form',
+        'method' => 'defaultSummary',
+        'form method' => 'defaultSummary_form',
         'style plugin' => TRUE,
         'breadcrumb' => TRUE, // generate a breadcrumb to here
       ),
@@ -562,7 +562,7 @@ function default_argument_form(&$form, &$form_state) {
    * Provide a form for selecting further summary options when the
    * default action is set to display one.
    */
-  function default_summary_form(&$form, &$form_state) {
+  function defaultSummary_form(&$form, &$form_state) {
     $style_plugins = Views::pluginManager('style')->getDefinitions();
     $summary_plugins = array();
     $format_options = array();
@@ -768,7 +768,7 @@ function process_summary_arguments(&$args) {
    * If an argument was expected and was not given, in this case, display
    * a summary query.
    */
-  function default_summary() {
+  function defaultSummary() {
     $this->view->build_info['summary'] = TRUE;
     $this->view->build_info['summary_level'] = $this->options['id'];
 
diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/style/DefaultSummary.php b/core/modules/views/lib/Drupal/views/Plugin/views/style/DefaultSummary.php
index 3d28046..631a8d3 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/style/DefaultSummary.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/style/DefaultSummary.php
@@ -17,7 +17,7 @@
  * @ingroup views_style_plugins
  *
  * @Plugin(
- *   id = "default_summary",
+ *   id = "defaultSummary",
  *   title = @Translation("List"),
  *   help = @Translation("Displays the default summary as a list."),
  *   theme = "views_view_summary",
diff --git a/core/modules/views/lib/Drupal/views/Tests/ViewElementTest.php b/core/modules/views/lib/Drupal/views/Tests/ViewElementTest.php
index 3d9371b..fd4a3f5 100644
--- a/core/modules/views/lib/Drupal/views/Tests/ViewElementTest.php
+++ b/core/modules/views/lib/Drupal/views/Tests/ViewElementTest.php
@@ -87,7 +87,7 @@ public function testViewElement() {
     $view->displayHandlers->get('default')->overrideOption('arguments', array(
       'age' => array(
         'default_action' => 'ignore',
-        'style_plugin' => 'default_summary',
+        'style_plugin' => 'defaultSummary',
         'style_options' => array(),
         'wildcard' => 'all',
         'wildcard_substitution' => 'All',
diff --git a/core/modules/views/lib/Drupal/views/ViewExecutable.php b/core/modules/views/lib/Drupal/views/ViewExecutable.php
index a8a8dd2..d530195 100644
--- a/core/modules/views/lib/Drupal/views/ViewExecutable.php
+++ b/core/modules/views/lib/Drupal/views/ViewExecutable.php
@@ -353,7 +353,7 @@ class ViewExecutable {
   /**
    * The options used by the style plugin of this running view.
    *
-   * @todo To be able to remove it, Drupal\views\Plugin\views\argument\ArgumentPluginBase::default_summary()
+   * @todo To be able to remove it, Drupal\views\Plugin\views\argument\ArgumentPluginBase::defaultSummary()
    *   should instantiate the style plugin.
    * @var array
    */
diff --git a/core/modules/views/tests/views_test_config/test_views/views.view.test_aggregate_count.yml b/core/modules/views/tests/views_test_config/test_views/views.view.test_aggregate_count.yml
index 0526e68..55054c2 100644
--- a/core/modules/views/tests/views_test_config/test_views/views.view.test_aggregate_count.yml
+++ b/core/modules/views/tests/views_test_config/test_views/views.view.test_aggregate_count.yml
@@ -14,7 +14,7 @@ display:
           field: type
           id: type
           summary:
-            format: default_summary
+            format: defaultSummary
           table: node
           plugin_id: node_type
       cache:
diff --git a/core/modules/views/tests/views_test_config/test_views/views.view.test_argument_default_fixed.yml b/core/modules/views/tests/views_test_config/test_views/views.view.test_argument_default_fixed.yml
index 333899e..464bb2d 100644
--- a/core/modules/views/tests/views_test_config/test_views/views.view.test_argument_default_fixed.yml
+++ b/core/modules/views/tests/views_test_config/test_views/views.view.test_argument_default_fixed.yml
@@ -14,7 +14,7 @@ display:
           field: 'null'
           id: 'null'
           must_not_be: '0'
-          style_plugin: default_summary
+          style_plugin: defaultSummary
           table: views
           plugin_id: 'null'
       cache:
diff --git a/core/modules/views/tests/views_test_config/test_views/views.view.test_destroy.yml b/core/modules/views/tests/views_test_config/test_views/views.view.test_destroy.yml
index 8342fc0..04aee61 100644
--- a/core/modules/views/tests/views_test_config/test_views/views.view.test_destroy.yml
+++ b/core/modules/views/tests/views_test_config/test_views/views.view.test_destroy.yml
@@ -34,21 +34,21 @@ display:
           default_argument_type: fixed
           field: created_day
           id: created_day
-          style_plugin: default_summary
+          style_plugin: defaultSummary
           table: node
           plugin_id: date_day
         created_fulldate:
           default_argument_type: fixed
           field: created_fulldate
           id: created_fulldate
-          style_plugin: default_summary
+          style_plugin: defaultSummary
           table: node
           plugin_id: date_fulldate
         created_month:
           default_argument_type: fixed
           field: created_month
           id: created_month
-          style_plugin: default_summary
+          style_plugin: defaultSummary
           table: node
           plugin_id: date_month
       cache:
diff --git a/core/modules/views/tests/views_test_config/test_views/views.view.test_glossary.yml b/core/modules/views/tests/views_test_config/test_views/views.view.test_glossary.yml
index 7054d2f..d6d8d24 100644
--- a/core/modules/views/tests/views_test_config/test_views/views.view.test_glossary.yml
+++ b/core/modules/views/tests/views_test_config/test_views/views.view.test_glossary.yml
@@ -15,7 +15,7 @@ display:
           id: title
           limit: '1'
           summary:
-            format: default_summary
+            format: defaultSummary
             number_of_records: '0'
           summary_options:
             items_per_page: '25'
diff --git a/core/modules/views/tests/views_test_config/test_views/views.view.test_simple_argument.yml b/core/modules/views/tests/views_test_config/test_views/views.view.test_simple_argument.yml
index 16cec76..1c266f2 100644
--- a/core/modules/views/tests/views_test_config/test_views/views.view.test_simple_argument.yml
+++ b/core/modules/views/tests/views_test_config/test_views/views.view.test_simple_argument.yml
@@ -42,7 +42,7 @@ display:
       arguments:
         age:
           default_action: ignore
-          style_plugin: default_summary
+          style_plugin: defaultSummary
           style_options: {  }
           wildcard: all
           wildcard_substitution: All
diff --git a/core/modules/views/tests/views_test_config/test_views/views.view.test_view_argument_validate_numeric.yml b/core/modules/views/tests/views_test_config/test_views/views.view.test_view_argument_validate_numeric.yml
index 192746d..2efdd5f 100644
--- a/core/modules/views/tests/views_test_config/test_views/views.view.test_view_argument_validate_numeric.yml
+++ b/core/modules/views/tests/views_test_config/test_views/views.view.test_view_argument_validate_numeric.yml
@@ -13,7 +13,7 @@ display:
           field: 'null'
           id: 'null'
           must_not_be: '0'
-          style_plugin: default_summary
+          style_plugin: defaultSummary
           table: views
           validate:
             type: numeric
diff --git a/core/modules/views/tests/views_test_config/test_views/views.view.test_view_argument_validate_php.yml b/core/modules/views/tests/views_test_config/test_views/views.view.test_view_argument_validate_php.yml
index 11dd632..c3f0097 100644
--- a/core/modules/views/tests/views_test_config/test_views/views.view.test_view_argument_validate_php.yml
+++ b/core/modules/views/tests/views_test_config/test_views/views.view.test_view_argument_validate_php.yml
@@ -13,7 +13,7 @@ display:
           field: 'null'
           id: 'null'
           must_not_be: '0'
-          style_plugin: default_summary
+          style_plugin: defaultSummary
           table: views
           validate:
             type: php