Update to Drupal 8.2.0. For more information, see https://www.drupal.org/project/drupal/releases/8.2.0

core/modules/toolbar/js/views/ToolbarVisualView.js

@@ -23,9 +23,9 @@
       };
 
       return {
-        'click .toolbar-bar .toolbar-tab': 'onTabClick',
+        'click .toolbar-bar .toolbar-tab .trigger': 'onTabClick',
         'click .toolbar-toggle-orientation button': 'onOrientationToggleClick',
-        'touchend .toolbar-bar .toolbar-tab': touchEndToClick,
+        'touchend .toolbar-bar .toolbar-tab .trigger': touchEndToClick,
         'touchend .toolbar-toggle-orientation button': touchEndToClick
       };
     },

core/modules/toolbar/tests/modules/toolbar_test/toolbar_test.module

@@ -12,7 +12,7 @@ use Drupal\Core\Url;
  */
 function toolbar_test_toolbar() {
 
-    $items['testing'] = array(
+  $items['testing'] = array(
     '#type' => 'toolbar_item',
     'tab' => array(
       '#type' => 'link',

core/modules/toolbar/toolbar.routing.yml

@@ -2,7 +2,5 @@ toolbar.subtrees:
   path: '/toolbar/subtrees/{hash}'
   defaults:
     _controller: '\Drupal\toolbar\Controller\ToolbarController::subtreesAjax'
-  options:
-    _theme: ajax_base_page
   requirements:
     _custom_access: '\Drupal\toolbar\Controller\ToolbarController::checkSubTreeAccess'