diff --git a/core/modules/system/templates/block--system-menu-block.html.twig b/core/modules/system/templates/block--system-menu-block.html.twig
index adc53af..27bb73e 100644
--- a/core/modules/system/templates/block--system-menu-block.html.twig
+++ b/core/modules/system/templates/block--system-menu-block.html.twig
@@ -1,4 +1,3 @@
-{% extends "@block/block.html.twig" %}
 {#
 /**
  * @file
diff --git a/core/themes/bartik/bartik.info.yml b/core/themes/bartik/bartik.info.yml
index 22b8a8d..48e1715 100644
--- a/core/themes/bartik/bartik.info.yml
+++ b/core/themes/bartik/bartik.info.yml
@@ -10,6 +10,8 @@ ckeditor_stylesheets:
   - css/ckeditor-iframe.css
 regions:
   header: Header
+  primary_menu: 'Primary menu'
+  secondary_menu: 'Secondary menu'
   help: Help
   page_top: 'Page top'
   page_bottom: 'Page bottom'
diff --git a/core/themes/bartik/templates/block--system-menu-block.html.twig b/core/themes/bartik/templates/block--system-menu-block.html.twig
index d8c5dd4..87330f0 100644
--- a/core/themes/bartik/templates/block--system-menu-block.html.twig
+++ b/core/themes/bartik/templates/block--system-menu-block.html.twig
@@ -1,5 +1,4 @@
 {% extends "@system/block--system-menu-block.html.twig" %}
-
 {#
 /**
  * @file