diff --git a/core/modules/system/templates/mark.html.twig b/core/modules/system/templates/mark.html.twig
index 2798bb0..1697de3 100644
--- a/core/modules/system/templates/mark.html.twig
+++ b/core/modules/system/templates/mark.html.twig
@@ -15,8 +15,8 @@
 #}
 {% if logged_in %}
   {% if status is constant('MARK_NEW') %}
-    <span class="marker">{{ 'new'|t }}</span>
+    <span>{{ 'new'|t }}</span>
   {% elseif status is constant('MARK_UPDATED') %}
-    <span class="marker">{{ 'updated'|t }}</span>
+    <span>{{ 'updated'|t }}</span>
   {% endif %}
 {% endif %}
diff --git a/core/modules/system/templates/menu-local-tasks.html.twig b/core/modules/system/templates/menu-local-tasks.html.twig
index dce922b..3f3a24b 100644
--- a/core/modules/system/templates/menu-local-tasks.html.twig
+++ b/core/modules/system/templates/menu-local-tasks.html.twig
@@ -17,9 +17,9 @@
 #}
 {% if primary %}
   <h2 class="visually-hidden">{{ 'Primary tabs'|t }}</h2>
-  <ul class="tabs primary">{{ primary }}</ul>
+  <ul>{{ primary }}</ul>
 {% endif %}
 {% if secondary %}
   <h2 class="visually-hidden">{{ 'Secondary tabs'|t }}</h2>
-  <ul class="tabs secondary">{{ secondary }}</ul>
+  <ul>{{ secondary }}</ul>
 {% endif %}
diff --git a/core/modules/system/templates/menu.html.twig b/core/modules/system/templates/menu.html.twig
index f01ce84..a9c7899 100644
--- a/core/modules/system/templates/menu.html.twig
+++ b/core/modules/system/templates/menu.html.twig
@@ -27,9 +27,9 @@
   {% import _self as menus %}
   {% if items %}
     {% if menu_level == 0 %}
-      <ul{{ attributes.addClass('menu') }}>
+      <ul{{ attributes }}>
     {% else %}
-      <ul class="menu">
+      <ul>
     {% endif %}
       {% for item in items %}
         <li{{ item.attributes }}>