diff --git a/core/modules/system/templates/menu.html.twig b/core/modules/system/templates/menu.html.twig
index 03704f2..e57a1ff 100644
--- a/core/modules/system/templates/menu.html.twig
+++ b/core/modules/system/templates/menu.html.twig
@@ -31,11 +31,7 @@
 {% macro menu_links(items, attributes, menu_level) %}
   {% import _self as menus %}
   {% if items %}
-    {% if menu_level == 0 %}
-      <ul{{ attributes }}>
-    {% else %}
-      <ul>
-    {% endif %}
+    <ul{{ menu_level == 0 ? attributes }}>
     {% for item in items %}
       <li{{ item.attributes }}>
         {{ link(item.title, item.url) }}
diff --git a/core/modules/toolbar/templates/menu--toolbar.html.twig b/core/modules/toolbar/templates/menu--toolbar.html.twig
index 659e8f5..2effeb7 100644
--- a/core/modules/toolbar/templates/menu--toolbar.html.twig
+++ b/core/modules/toolbar/templates/menu--toolbar.html.twig
@@ -31,11 +31,7 @@
 {% macro menu_links(items, attributes, menu_level) %}
   {% import _self as menus %}
   {% if items %}
-    {% if menu_level == 0 %}
-      <ul{{ attributes.addClass('toolbar-menu') }}>
-    {% else %}
-      <ul class="toolbar-menu">
-    {% endif %}
+    <ul{% if menu_level == 0 %}{{ attributes.addClass('toolbar-menu') }}{% else %} class="toolbar-menu"{% endif %}>
     {% for item in items %}
       {%
         set classes = [
diff --git a/core/themes/classy/templates/navigation/menu.html.twig b/core/themes/classy/templates/navigation/menu.html.twig
index e482ef4..955d6a8 100644
--- a/core/themes/classy/templates/navigation/menu.html.twig
+++ b/core/themes/classy/templates/navigation/menu.html.twig
@@ -29,11 +29,7 @@
 {% macro menu_links(items, attributes, menu_level) %}
   {% import _self as menus %}
   {% if items %}
-    {% if menu_level == 0 %}
-      <ul{{ attributes.addClass('menu') }}>
-    {% else %}
-      <ul class="menu">
-    {% endif %}
+    <ul{% if menu_level == 0 %}{{ attributes.addClass('menu') }}{% else %} class="menu"{% endif %}>
     {% for item in items %}
       {%
         set classes = [
diff --git a/core/themes/stable/templates/navigation/menu--toolbar.html.twig b/core/themes/stable/templates/navigation/menu--toolbar.html.twig
index 55cfc5b..83b94fe 100644
--- a/core/themes/stable/templates/navigation/menu--toolbar.html.twig
+++ b/core/themes/stable/templates/navigation/menu--toolbar.html.twig
@@ -29,11 +29,7 @@
 {% macro menu_links(items, attributes, menu_level) %}
   {% import _self as menus %}
   {% if items %}
-    {% if menu_level == 0 %}
-      <ul{{ attributes.addClass('toolbar-menu') }}>
-    {% else %}
-      <ul class="toolbar-menu">
-    {% endif %}
+    <ul{% if menu_level == 0 %}{{ attributes.addClass('toolbar-menu') }}{% else %} class="toolbar-menu"{% endif %}>
     {% for item in items %}
       {%
         set classes = [
diff --git a/core/themes/stable/templates/navigation/menu.html.twig b/core/themes/stable/templates/navigation/menu.html.twig
index 33efca8..83c9b41 100644
--- a/core/themes/stable/templates/navigation/menu.html.twig
+++ b/core/themes/stable/templates/navigation/menu.html.twig
@@ -29,11 +29,7 @@
 {% macro menu_links(items, attributes, menu_level) %}
   {% import _self as menus %}
   {% if items %}
-    {% if menu_level == 0 %}
-      <ul{{ attributes }}>
-    {% else %}
-      <ul>
-    {% endif %}
+    <ul{{ menu_level == 0 ? attributes }}>
     {% for item in items %}
       <li{{ item.attributes }}>
         {{ link(item.title, item.url) }}