diff --git a/core/modules/views/lib/Drupal/views/Annotation/ViewsAccess.php b/core/modules/views/lib/Drupal/views/Annotation/ViewsAccess.php
index 6917904..e94dcdb 100644
--- a/core/modules/views/lib/Drupal/views/Annotation/ViewsAccess.php
+++ b/core/modules/views/lib/Drupal/views/Annotation/ViewsAccess.php
@@ -32,7 +32,7 @@ class ViewsAccess extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $title = '';
+  public $title;
 
   /**
    * (optional) The short title used in the views UI.
@@ -41,7 +41,7 @@ class ViewsAccess extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $short_title = '';
+  public $short_title;
 
   /**
    * A short help string; this is displayed in the views UI.
@@ -50,7 +50,7 @@ class ViewsAccess extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $help = '';
+  public $help;
 
   /**
    * The types of the display this plugin can be used with.
diff --git a/core/modules/views/lib/Drupal/views/Annotation/ViewsArgumentDefault.php b/core/modules/views/lib/Drupal/views/Annotation/ViewsArgumentDefault.php
index 2910a58..d1f15da 100644
--- a/core/modules/views/lib/Drupal/views/Annotation/ViewsArgumentDefault.php
+++ b/core/modules/views/lib/Drupal/views/Annotation/ViewsArgumentDefault.php
@@ -32,7 +32,7 @@ class ViewsArgumentDefault extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $title = '';
+  public $title;
 
   /**
    * (optional) The short title used in the views UI.
@@ -41,7 +41,7 @@ class ViewsArgumentDefault extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $short_title = '';
+  public $short_title;
 
   /**
    * Whether the plugin should be not selectable in the UI.
diff --git a/core/modules/views/lib/Drupal/views/Annotation/ViewsArgumentValidator.php b/core/modules/views/lib/Drupal/views/Annotation/ViewsArgumentValidator.php
index ae2d3f2..f19e6fa 100644
--- a/core/modules/views/lib/Drupal/views/Annotation/ViewsArgumentValidator.php
+++ b/core/modules/views/lib/Drupal/views/Annotation/ViewsArgumentValidator.php
@@ -32,7 +32,7 @@ class ViewsArgumentValidator extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $title = '';
+  public $title;
 
   /**
    * (optional) The short title used in the views UI.
@@ -41,7 +41,7 @@ class ViewsArgumentValidator extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $short_title = '';
+  public $short_title;
 
   /**
    * Whether the plugin should be not selectable in the UI.
diff --git a/core/modules/views/lib/Drupal/views/Annotation/ViewsCache.php b/core/modules/views/lib/Drupal/views/Annotation/ViewsCache.php
index d092942..c1893ad 100644
--- a/core/modules/views/lib/Drupal/views/Annotation/ViewsCache.php
+++ b/core/modules/views/lib/Drupal/views/Annotation/ViewsCache.php
@@ -32,7 +32,7 @@ class ViewsCache extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $title = '';
+  public $title;
 
   /**
    * (optional) The short title used in the views UI.
@@ -41,7 +41,7 @@ class ViewsCache extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $short_title = '';
+  public $short_title;
 
   /**
    * A short help string; this is displayed in the views UI.
@@ -50,7 +50,7 @@ class ViewsCache extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $help = '';
+  public $help;
 
   /**
    * The types of the display this plugin can be used with.
diff --git a/core/modules/views/lib/Drupal/views/Annotation/ViewsDisplay.php b/core/modules/views/lib/Drupal/views/Annotation/ViewsDisplay.php
index fc6652e..cdc1f1e 100644
--- a/core/modules/views/lib/Drupal/views/Annotation/ViewsDisplay.php
+++ b/core/modules/views/lib/Drupal/views/Annotation/ViewsDisplay.php
@@ -32,7 +32,7 @@ class ViewsDisplay extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $title = '';
+  public $title;
 
   /**
    * (optional) The short title used in the views UI.
@@ -41,7 +41,7 @@ class ViewsDisplay extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $short_title = '';
+  public $short_title;
 
   /**
    * The administrative name of the display.
@@ -53,7 +53,7 @@ class ViewsDisplay extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $admin = '';
+  public $admin;
 
   /**
    * A short help string; this is displayed in the views UI.
@@ -62,7 +62,7 @@ class ViewsDisplay extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $help = '';
+  public $help;
 
   /**
    * Whether or not to use hook_menu() to register a route.
diff --git a/core/modules/views/lib/Drupal/views/Annotation/ViewsDisplayExtender.php b/core/modules/views/lib/Drupal/views/Annotation/ViewsDisplayExtender.php
index 5eceb64..f12e75f 100644
--- a/core/modules/views/lib/Drupal/views/Annotation/ViewsDisplayExtender.php
+++ b/core/modules/views/lib/Drupal/views/Annotation/ViewsDisplayExtender.php
@@ -30,7 +30,7 @@ class ViewsDisplayExtender extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $title = '';
+  public $title;
 
   /**
    * (optional) The short title used in the views UI.
@@ -39,7 +39,7 @@ class ViewsDisplayExtender extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $short_title = '';
+  public $short_title;
 
   /**
    * A short help string; this is displayed in the views UI.
@@ -48,7 +48,7 @@ class ViewsDisplayExtender extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $help = '';
+  public $help;
 
   /**
    * Whether or not the plugin is selectable in the UI.
diff --git a/core/modules/views/lib/Drupal/views/Annotation/ViewsExposedForm.php b/core/modules/views/lib/Drupal/views/Annotation/ViewsExposedForm.php
index fd9376b..8537d42 100644
--- a/core/modules/views/lib/Drupal/views/Annotation/ViewsExposedForm.php
+++ b/core/modules/views/lib/Drupal/views/Annotation/ViewsExposedForm.php
@@ -32,7 +32,7 @@ class ViewsExposedForm extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $title = '';
+  public $title;
 
   /**
    * (optional) The short title used in the views UI.
@@ -41,7 +41,7 @@ class ViewsExposedForm extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $short_title = '';
+  public $short_title;
 
   /**
    * A short help string; this is displayed in the views UI.
@@ -50,7 +50,7 @@ class ViewsExposedForm extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $help = '';
+  public $help;
 
   /**
    * The types of the display this plugin can be used with.
diff --git a/core/modules/views/lib/Drupal/views/Annotation/ViewsPager.php b/core/modules/views/lib/Drupal/views/Annotation/ViewsPager.php
index 2466a57..6c04d95 100644
--- a/core/modules/views/lib/Drupal/views/Annotation/ViewsPager.php
+++ b/core/modules/views/lib/Drupal/views/Annotation/ViewsPager.php
@@ -32,7 +32,7 @@ class ViewsPager extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $title = '';
+  public $title;
 
   /**
    * (optional) The short title used in the views UI.
@@ -41,7 +41,7 @@ class ViewsPager extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $short_title = '';
+  public $short_title;
 
   /**
    * A short help string; this is displayed in the views UI.
@@ -50,7 +50,7 @@ class ViewsPager extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $help = '';
+  public $help;
 
   /**
    * The theme function used to render the pager's output.
diff --git a/core/modules/views/lib/Drupal/views/Annotation/ViewsPluginAnnotationBase.php b/core/modules/views/lib/Drupal/views/Annotation/ViewsPluginAnnotationBase.php
index baa2a76..794519e 100644
--- a/core/modules/views/lib/Drupal/views/Annotation/ViewsPluginAnnotationBase.php
+++ b/core/modules/views/lib/Drupal/views/Annotation/ViewsPluginAnnotationBase.php
@@ -29,6 +29,6 @@
    *
    * @var bool (optional)
    */
-  public $register_theme = TRUE;
+  public $register_theme;
 
 }
diff --git a/core/modules/views/lib/Drupal/views/Annotation/ViewsQuery.php b/core/modules/views/lib/Drupal/views/Annotation/ViewsQuery.php
index 5be9806..a486a11 100644
--- a/core/modules/views/lib/Drupal/views/Annotation/ViewsQuery.php
+++ b/core/modules/views/lib/Drupal/views/Annotation/ViewsQuery.php
@@ -32,7 +32,7 @@ class ViewsQuery extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $title = '';
+  public $title;
 
   /**
    * (optional) The short title used in the views UI.
@@ -41,7 +41,7 @@ class ViewsQuery extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $short_title = '';
+  public $short_title;
 
   /**
    * A short help string; this is displayed in the views UI.
@@ -50,7 +50,7 @@ class ViewsQuery extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $help = '';
+  public $help;
 
   /**
    * Whether the plugin should be not selectable in the UI.
diff --git a/core/modules/views/lib/Drupal/views/Annotation/ViewsRow.php b/core/modules/views/lib/Drupal/views/Annotation/ViewsRow.php
index 43d8eeb..1abd583 100644
--- a/core/modules/views/lib/Drupal/views/Annotation/ViewsRow.php
+++ b/core/modules/views/lib/Drupal/views/Annotation/ViewsRow.php
@@ -32,7 +32,7 @@ class ViewsRow extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $title = '';
+  public $title;
 
   /**
    * (optional) The short title used in the views UI.
@@ -41,7 +41,7 @@ class ViewsRow extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $short_title = '';
+  public $short_title;
 
   /**
    * A short help string; this is displayed in the views UI.
@@ -50,7 +50,7 @@ class ViewsRow extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $help = '';
+  public $help;
 
   /**
    * The theme function used to render the row output.
diff --git a/core/modules/views/lib/Drupal/views/Annotation/ViewsStyle.php b/core/modules/views/lib/Drupal/views/Annotation/ViewsStyle.php
index 386f36e..f0f7a3c 100644
--- a/core/modules/views/lib/Drupal/views/Annotation/ViewsStyle.php
+++ b/core/modules/views/lib/Drupal/views/Annotation/ViewsStyle.php
@@ -32,7 +32,7 @@ class ViewsStyle extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $title = '';
+  public $title;
 
   /**
    * (optional) The short title used in the views UI.
@@ -41,7 +41,7 @@ class ViewsStyle extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $short_title = '';
+  public $short_title;
 
   /**
    * A short help string; this is displayed in the views UI.
@@ -50,7 +50,7 @@ class ViewsStyle extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $help = '';
+  public $help;
 
   /**
    * The theme function used to render the style output.
diff --git a/core/modules/views/lib/Drupal/views/Annotation/ViewsWizard.php b/core/modules/views/lib/Drupal/views/Annotation/ViewsWizard.php
index 9486804..7e1f40d 100644
--- a/core/modules/views/lib/Drupal/views/Annotation/ViewsWizard.php
+++ b/core/modules/views/lib/Drupal/views/Annotation/ViewsWizard.php
@@ -32,7 +32,7 @@ class ViewsWizard extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $title = '';
+  public $title;
 
   /**
    * (optional) The short title used in the views UI.
@@ -41,7 +41,7 @@ class ViewsWizard extends ViewsPluginAnnotationBase {
    *
    * @ingroup plugin_translatable
    */
-  public $short_title = '';
+  public $short_title;
 
   /**
    * The base tables on which this wizard is used.
diff --git a/core/modules/views/lib/Drupal/views/Views.php b/core/modules/views/lib/Drupal/views/Views.php
index ba45e17..430b789 100644
--- a/core/modules/views/lib/Drupal/views/Views.php
+++ b/core/modules/views/lib/Drupal/views/Views.php
@@ -117,7 +117,7 @@ public static function fetchPluginNames($type, $key = NULL, array $base = array(
       }
 
       if (empty($plugin['no_ui']) && (empty($base) || empty($plugin['base']) || array_intersect($base, $plugin['base']))) {
-        $plugins[$id] = $plugin['title'];
+        $plugins[$id] = isset($plugin['title']) ? $plugin['title'] : '';
       }
     }