diff -u b/core/themes/seven/seven.theme b/core/themes/seven/seven.theme
--- b/core/themes/seven/seven.theme
+++ b/core/themes/seven/seven.theme
@@ -152,17 +152,8 @@
  */
 function seven_preprocess_admin_block_content(&$variables) {
   if (!empty($variables['content'])) {
-    // @todo Remove once theme_admin_block() is converted to Twig.
-    // See https://drupal.org/node/1987410
-    $compact = system_admin_compact_mode();
-    $variables['attributes'] = array('class' => array('admin-list'));
-    if ($compact) {
-      $variables['attributes']['class'][] = 'compact';
-    }
     foreach ($variables['content'] as $key => $item) {
-      $variables['content'][$key]['label'] = Xss::filterAdmin($item['title']);
       $variables['content'][$key]['url'] = url($item['link_path']);
-      $variables['content'][$key]['description'] = Xss::filterAdmin($item['description']);
     }
   }
 }
@@ -292,7 +283,7 @@
   );
 
   $form['advanced']['#type'] = 'container';
-  $form['meta'] = array(
+  $form['meta'] = array (
     '#attributes' => array('class' => array('entity-meta-header')),
     '#type' => 'container',
     '#group' => 'advanced',
diff -u b/core/themes/seven/templates/admin-block-content.html.twig b/core/themes/seven/templates/admin-block-content.html.twig
--- b/core/themes/seven/templates/admin-block-content.html.twig
+++ b/core/themes/seven/templates/admin-block-content.html.twig
@@ -5,15 +5,13 @@
  *
  * Available variables:
  * - content: List of administrative menu items. Each menu item contains:
- *   - path: Path to the admin section.
+ *   - url: Path to the admin section.
  *   - label: Short name of the section.
  *   - description: Description of the administrative menu item.
  * - attributes: HTML attributes to be added to the element.
  *
  * @see template_preprocess_admin_block_content()
  * @see seven_preprocess_admin_block_content()
- *
- * @ingroup themeable
  */
 #}
 {% if content %}
diff -u b/core/themes/seven/templates/custom-block-add-list.html.twig b/core/themes/seven/templates/custom-block-add-list.html.twig
--- b/core/themes/seven/templates/custom-block-add-list.html.twig
+++ b/core/themes/seven/templates/custom-block-add-list.html.twig
@@ -9,15 +9,13 @@
  * - types: A collection of all the available custom block types.
  *   Each type contains:
  *   - type: The custom block type, containing all the items below.
- *   - link: A link to add a block of this type.
+ *   - url: A link to add a block of this type.
  *   - description: A description of this custom block type.
  *   - label: The title of the custom block type.
  *   - path: A path for the link to add a block of this type.
  *
  * @see template_preprocess_custom_block_add_list()
  * @see seven_preprocess_custom_block_add_list()
- *
- * @ingroup themeable
  */
  #}
 <ul class="admin-list">
diff -u b/core/themes/seven/templates/node-add-list.html.twig b/core/themes/seven/templates/node-add-list.html.twig
--- b/core/themes/seven/templates/node-add-list.html.twig
+++ b/core/themes/seven/templates/node-add-list.html.twig
@@ -5,13 +5,13 @@
  *
  * Available variables:
  * - types: List of content types. Each content type contains:
- *   - add_link: Link to create a piece of content of this type.
+ *   - url: Path to the add content of this type page.
+ *   - label: The title of this type of content.
  *   - description: Description of this type of content.
+ * - add_content_type_url: Path to the add content type page.
  *
  * @see template_preprocess_node_add_list()
  * @see seven_preprocess_node_add_list()
- *
- * @ingroup themeable
  */
 #}
 {% if content %}
diff -u b/core/themes/seven/templates/tablesort-indicator.html.twig b/core/themes/seven/templates/tablesort-indicator.html.twig
--- b/core/themes/seven/templates/tablesort-indicator.html.twig
+++ b/core/themes/seven/templates/tablesort-indicator.html.twig
@@ -6,8 +6,6 @@
  * Available variables:
  * - style: Either 'asc' or 'desc', indicating the sorting direction.
  * - theme_path: Path to the theme.
- *
- * @ingroup themeable
  */
 #}
 {% if style == 'asc' -%}