diff --git a/core/modules/comment/config/install/views.view.comments_recent.yml b/core/modules/comment/config/install/views.view.comments_recent.yml
index 7a4b559..98b0ce1 100644
--- a/core/modules/comment/config/install/views.view.comments_recent.yml
+++ b/core/modules/comment/config/install/views.view.comments_recent.yml
@@ -45,7 +45,6 @@ display:
           row_class: ''
           default_row_class: true
           type: ul
-          wrapper_class: item-list
           class: ''
         provider: views
       row:
diff --git a/core/modules/simpletest/css/simpletest.module.css b/core/modules/simpletest/css/simpletest.module.css
index 71f7eea..88c4564 100644
--- a/core/modules/simpletest/css/simpletest.module.css
+++ b/core/modules/simpletest/css/simpletest.module.css
@@ -35,7 +35,7 @@ table#simpletest-form-table tr.simpletest-group label {
   display: inline;
 }
 
-div.message > div.item-list {
+div.message > ul {
   font-weight: normal;
 }
 
diff --git a/core/modules/system/css/system.theme.css b/core/modules/system/css/system.theme.css
index 3e9180b..020b68c 100644
--- a/core/modules/system/css/system.theme.css
+++ b/core/modules/system/css/system.theme.css
@@ -21,24 +21,6 @@ td.active {
 }
 
 /**
- * Markup generated by theme_item_list().
- */
-.item-list .title {
-  font-weight: bold;
-}
-.item-list ul {
-  margin: 0 0 0.75em 0;
-  padding: 0;
-}
-.item-list ul li {
-  margin: 0 0 0.25em 1.5em; /* LTR */
-  padding: 0;
-}
-[dir="rtl"] .item-list ul li {
-  margin: 0 1.5em 0.25em 0;
-}
-
-/**
  * Markup generated by Form API.
  */
 .form-item,
diff --git a/core/modules/system/src/Tests/Theme/FunctionsTest.php b/core/modules/system/src/Tests/Theme/FunctionsTest.php
index c8d068c..0e55865 100644
--- a/core/modules/system/src/Tests/Theme/FunctionsTest.php
+++ b/core/modules/system/src/Tests/Theme/FunctionsTest.php
@@ -44,21 +44,21 @@ function testItemList() {
     // Verify that empty items produce the empty string.
     $variables = array();
     $variables['empty'] = 'No items found.';
-    $expected = '<div class="item-list">No items found.</div>';
+    $expected = 'No items found.';
     $this->assertThemeOutput('item_list', $variables, $expected, 'Empty %callback generates empty string.');
 
     // Verify that empty items produce the empty string with title.
     $variables = array();
     $variables['title'] = 'Some title';
     $variables['empty'] = 'No items found.';
-    $expected = '<div class="item-list"><h3>Some title</h3>No items found.</div>';
+    $expected = '<h3>Some title</h3>No items found.';
     $this->assertThemeOutput('item_list', $variables, $expected, 'Empty %callback generates empty string with title.');
 
     // Verify that title set to 0 is output.
     $variables = array();
     $variables['title'] = 0;
     $variables['empty'] = 'No items found.';
-    $expected = '<div class="item-list"><h3>0</h3>No items found.</div>';
+    $expected = '<h3>0</h3>No items found.';
     $this->assertThemeOutput('item_list', $variables, $expected, '%callback with title set to 0 generates a title.');
 
     // Verify that title set to a render array is output.
@@ -67,7 +67,7 @@ function testItemList() {
       '#markup' => '<span>Render array</span>',
     );
     $variables['empty'] = 'No items found.';
-    $expected = '<div class="item-list"><h3><span>Render array</span></h3>No items found.</div>';
+    $expected = '<h3><span>Render array</span></h3>No items found.';
     $this->assertThemeOutput('item_list', $variables, $expected, '%callback with title set to a render array generates a title.');
 
     // Verify that empty text is not displayed when there are list items.
@@ -75,7 +75,7 @@ function testItemList() {
     $variables['title'] = 'Some title';
     $variables['empty'] = 'No items found.';
     $variables['items'] = array('Un', 'Deux', 'Trois');
-    $expected = '<div class="item-list"><h3>Some title</h3><ul><li>Un</li><li>Deux</li><li>Trois</li></ul></div>';
+    $expected = '<h3>Some title</h3><ul><li>Un</li><li>Deux</li><li>Trois</li></ul>';
     $this->assertThemeOutput('item_list', $variables, $expected, '%callback does not print empty text when there are list items.');
 
     // Verify nested item lists.
@@ -136,24 +136,23 @@ function testItemList() {
       'f',
     );
 
-    $inner_b = '<div class="item-list"><ol id="blist">';
+    $inner_b = '<ol id="blist">';
     $inner_b .= '<li>ba</li>';
     $inner_b .= '<li class="item-class-bb">bb</li>';
-    $inner_b .= '</ol></div>';
+    $inner_b .= '</ol>';
 
-    $inner_cb = '<div class="item-list"><ul>';
+    $inner_cb = '<ul>';
     $inner_cb .= '<li>cba</li>';
     $inner_cb .= '<li>cbb</li>';
-    $inner_cb .= '</ul></div>';
+    $inner_cb .= '</ul>';
 
-    $inner_c = '<div class="item-list"><ul id="clist">';
+    $inner_c = '<ul id="clist">';
     $inner_c .= '<li>ca</li>';
     $inner_c .= '<li class="item-class-cb">cb' . $inner_cb . '</li>';
     $inner_c .= '<li>cc</li>';
-    $inner_c .= '</ul></div>';
+    $inner_c .= '</ul>';
 
-    $expected = '<div class="item-list">';
-    $expected .= '<h3>Some title</h3>';
+    $expected = '<h3>Some title</h3>';
     $expected .= '<ul id="parentlist">';
     $expected .= '<li>a</li>';
     $expected .= '<li id="item-id-b">b' . $inner_b . '</li>';
@@ -161,7 +160,7 @@ function testItemList() {
     $expected .= '<li id="item-id-d">d</li>';
     $expected .= '<li id="item-id-e"></li>';
     $expected .= '<li>f</li>';
-    $expected .= '</ul></div>';
+    $expected .= '</ul>';
 
     $this->assertThemeOutput('item_list', $variables, $expected);
   }
diff --git a/core/modules/system/templates/item-list.html.twig b/core/modules/system/templates/item-list.html.twig
index bd71e7f..2a59319 100644
--- a/core/modules/system/templates/item-list.html.twig
+++ b/core/modules/system/templates/item-list.html.twig
@@ -19,18 +19,16 @@
  */
 #}
 {%- if items or empty -%}
-  <div class="item-list">
-    {%- if title is not empty -%}
-      <h3>{{ title }}</h3>
-    {%- endif -%}
-    {%- if items -%}
-      <{{ list_type }}{{ attributes }}>
-        {%- for item in items -%}
-          <li{{ item.attributes }}>{{ item.value }}</li>
-        {%- endfor -%}
-      </{{ list_type }}>
-    {%- else -%}
-      {{- empty -}}
-    {%- endif -%}
-  </div>
+  {%- if title is not empty -%}
+    <h3>{{ title }}</h3>
+  {%- endif -%}
+  {%- if items -%}
+    <{{ list_type }}{{ attributes }}>
+      {%- for item in items -%}
+        <li{{ item.attributes }}>{{ item.value }}</li>
+      {%- endfor -%}
+    </{{ list_type }}>
+  {%- else -%}
+    {{- empty -}}
+  {%- endif -%}
 {%- endif %}
diff --git a/core/modules/toolbar/css/toolbar.module.css b/core/modules/toolbar/css/toolbar.module.css
index 06224fe..30661d7 100644
--- a/core/modules/toolbar/css/toolbar.module.css
+++ b/core/modules/toolbar/css/toolbar.module.css
@@ -20,10 +20,9 @@
 /**
  * Very specific overrides for Drupal system CSS.
  */
+.toolbar ul,
 .toolbar li,
 .toolbar .menu li,
-.toolbar .item-list,
-.toolbar .item-list li,
 .toolbar .menu li.expanded {
   list-style-type: none;
   list-style-image: none;
diff --git a/core/modules/user/config/install/views.view.who_s_online.yml b/core/modules/user/config/install/views.view.who_s_online.yml
index 5b22082..0109ebd 100644
--- a/core/modules/user/config/install/views.view.who_s_online.yml
+++ b/core/modules/user/config/install/views.view.who_s_online.yml
@@ -52,7 +52,6 @@ display:
           row_class: ''
           default_row_class: true
           type: ul
-          wrapper_class: item-list
           class: ''
         provider: views
       row:
diff --git a/core/modules/views/src/Plugin/views/style/HtmlList.php b/core/modules/views/src/Plugin/views/style/HtmlList.php
index d965792..b98b030 100644
--- a/core/modules/views/src/Plugin/views/style/HtmlList.php
+++ b/core/modules/views/src/Plugin/views/style/HtmlList.php
@@ -46,7 +46,6 @@ protected function defineOptions() {
 
     $options['type'] = array('default' => 'ul');
     $options['class'] = array('default' => '');
-    $options['wrapper_class'] = array('default' => 'item-list');
 
     return $options;
   }
@@ -62,13 +61,6 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       '#options' => array('ul' => $this->t('Unordered list'), 'ol' => $this->t('Ordered list')),
       '#default_value' => $this->options['type'],
     );
-    $form['wrapper_class'] = array(
-      '#title' => $this->t('Wrapper class'),
-      '#description' => $this->t('The class to provide on the wrapper, outside the list.'),
-      '#type' => 'textfield',
-      '#size' => '30',
-      '#default_value' => $this->options['wrapper_class'],
-    );
     $form['class'] = array(
       '#title' => $this->t('List class'),
       '#description' => $this->t('The class to provide on the list element itself.'),
diff --git a/core/modules/views/templates/views-view-list.html.twig b/core/modules/views/templates/views-view-list.html.twig
index 8de787c..4c0b9d8 100644
--- a/core/modules/views/templates/views-view-list.html.twig
+++ b/core/modules/views/templates/views-view-list.html.twig
@@ -18,21 +18,14 @@
  * @ingroup themeable
  */
 #}
-{% if attributes -%}
-  <div{{ attributes }}>
+{% if title %}
+  <h3>{{ title }}</h3>
 {% endif %}
-  {% if title %}
-    <h3>{{ title }}</h3>
-  {% endif %}
 
-  <{{ list.type }}{{ list.attributes }}>
+<{{ list.type }}{{ list.attributes }}>
 
-    {% for row in rows %}
-      <li{{ row.attributes }}>{{ row.content }}</li>
-    {% endfor %}
+  {% for row in rows %}
+    <li{{ row.attributes }}>{{ row.content }}</li>
+  {% endfor %}
 
-  </{{ list.type }}>
-
-{% if attributes -%}
-  </div>
-{% endif %}
+</{{ list.type }}>
diff --git a/core/modules/views/templates/views-view-summary.html.twig b/core/modules/views/templates/views-view-summary.html.twig
index 4d8ed8f..db9bae5 100644
--- a/core/modules/views/templates/views-view-summary.html.twig
+++ b/core/modules/views/templates/views-view-summary.html.twig
@@ -19,14 +19,12 @@
  * @ingroup themeable
  */
 #}
-<div class="item-list">
-  <ul class="views-summary">
-  {% for row in rows %}
-    <li><a href="{{ row.url }}"{{ row.attributes }}>{{ row.link }}</a>
-      {% if options.count %}
-        ({{ row.count }})
-      {% endif %}
-    </li>
-  {% endfor %}
-  </ul>
-</div>
+<ul class="views-summary">
+{% for row in rows %}
+  <li><a href="{{ row.url }}"{{ row.attributes }}>{{ row.link }}</a>
+    {% if options.count %}
+      ({{ row.count }})
+    {% endif %}
+  </li>
+{% endfor %}
+</ul>
diff --git a/core/modules/views_ui/css/views_ui.admin.theme.css b/core/modules/views_ui/css/views_ui.admin.theme.css
index 47909d9..124be4c 100644
--- a/core/modules/views_ui/css/views_ui.admin.theme.css
+++ b/core/modules/views_ui/css/views_ui.admin.theme.css
@@ -912,7 +912,7 @@ td.group-title {
   content: "\00A0\003E";
 }
 
-.views-ui-dialog details .item-list {
+.views-ui-dialog details ul {
   padding-left: 2em;
 }
 /* @end */
@@ -1059,11 +1059,11 @@ td.group-title {
 
 /* @group HTML list */
 
-#views-live-preview .view-content > .item-list > ul {
+#views-live-preview .view-content > ul {
   list-style-position: outside;
   padding-left: 21px; /* LTR */
 }
-[dir="rtl"] #views-live-preview .view-content > .item-list > ul {
+[dir="rtl"] #views-live-preview .view-content > ul {
   padding-left: 0;
   padding-right: 21px;
 }
diff --git a/core/modules/views_ui/src/Tests/FieldUITest.php b/core/modules/views_ui/src/Tests/FieldUITest.php
index fac6e46..7fad7d7 100644
--- a/core/modules/views_ui/src/Tests/FieldUITest.php
+++ b/core/modules/views_ui/src/Tests/FieldUITest.php
@@ -42,18 +42,18 @@ public function testFieldUI() {
     // Ensure that the expected tokens appear in the UI.
     $edit_handler_url = 'admin/structure/views/nojs/handler/test_view/default/field/age';
     $this->drupalGet($edit_handler_url);
-    $result = $this->xpath('//details[@id="edit-options-alter-help"]/div[@class="details-wrapper"]/div[@class="item-list"]/fields/li');
+    $result = $this->xpath('//details[@id="edit-options-alter-help"]/div[@class="details-wrapper"]/ul/fields/li');
     $this->assertEqual((string) $result[0], '[age] == Age');
 
     $edit_handler_url = 'admin/structure/views/nojs/handler/test_view/default/field/id';
     $this->drupalGet($edit_handler_url);
-    $result = $this->xpath('//details[@id="edit-options-alter-help"]/div[@class="details-wrapper"]/div[@class="item-list"]/fields/li');
+    $result = $this->xpath('//details[@id="edit-options-alter-help"]/div[@class="details-wrapper"]/ul/fields/li');
     $this->assertEqual((string) $result[0], '[age] == Age');
     $this->assertEqual((string) $result[1], '[id] == ID');
 
     $edit_handler_url = 'admin/structure/views/nojs/handler/test_view/default/field/name';
     $this->drupalGet($edit_handler_url);
-    $result = $this->xpath('//details[@id="edit-options-alter-help"]/div[@class="details-wrapper"]/div[@class="item-list"]/fields/li');
+    $result = $this->xpath('//details[@id="edit-options-alter-help"]/div[@class="details-wrapper"]/ul/fields/li');
     $this->assertEqual((string) $result[0], '[age] == Age');
     $this->assertEqual((string) $result[1], '[id] == ID');
     $this->assertEqual((string) $result[2], '[name] == Name');
diff --git a/core/themes/bartik/css/style.css b/core/themes/bartik/css/style.css
index e53c10d..0cc6b5f 100644
--- a/core/themes/bartik/css/style.css
+++ b/core/themes/bartik/css/style.css
@@ -310,11 +310,11 @@ ul.menu li {
 [dir="rtl"] .region-content ol {
   padding: 0 15px 0.25em 0;
 }
-.item-list ul li {
+li {
   margin: 0;
   padding: 0.2em 0.5em 0 0; /* LTR */
 }
-[dir="rtl"] .item-list ul li {
+[dir="rtl"] li {
   padding: 0.2em 0 0 0.5em;
 }
 ul.tips {
@@ -478,30 +478,30 @@ h1.site-name {
   margin: 0;
   padding: 0;
 }
-.region-header #block-user-login div.item-list,
+.region-header #block-user-login ul,
 .region-header #block-user-login div.description {
   font-size: 0.916em;
   margin: 0;
 }
-.region-header #block-user-login div.item-list {
+.region-header #block-user-login ul {
   clear: both;
 }
 .region-header #block-user-login div.description {
   display: inline;
 }
-.region-header #block-user-login .item-list ul {
+.region-header #block-user-login ul {
   padding: 0;
   line-height: 1;
 }
-.region-header #block-user-login .item-list li {
+.region-header #block-user-login li {
   list-style: none;
   float: left; /* LTR */
   padding: 3px 0 1px;
 }
-.region-header #block-user-login .item-list li:last-child {
+.region-header #block-user-login li:last-child {
   padding-left: 0.5em; /* LTR */
 }
-[dir="rtl"] .region-header #block-user-login .item-list li:last-child {
+[dir="rtl"] .region-header #block-user-login li:last-child {
   padding-left: 0;
   padding-right: 0.5em;
 }
@@ -543,7 +543,7 @@ h1.site-name {
 [dir="rtl"] .site-branding-text,
 [dir="rtl"] .region-header .block,
 [dir="rtl"] .region-header #block-user-login .form-item,
-[dir="rtl"] .region-header #block-user-login .item-list li {
+[dir="rtl"] .region-header #block-user-login li {
   float: right;
 }
 
diff --git a/core/themes/seven/css/components/menus-and-lists.css b/core/themes/seven/css/components/menus-and-lists.css
index bd2d908..c68808b 100644
--- a/core/themes/seven/css/components/menus-and-lists.css
+++ b/core/themes/seven/css/components/menus-and-lists.css
@@ -1,15 +1,7 @@
 /**
  * Menus and lists.
  */
-.item-list ul {
-  list-style-type: disc;
-  list-style-image: none;
-  margin: 0.25em 0 0.25em 1.5em; /* LTR */
-}
-[dir="rtl"] .item-list ul {
-  margin: 0.25em 1.5em 0.25em 0;
-}
-.item-list ul li,
+li,
 li.leaf,
 ul.menu li {
   list-style-type: disc;
@@ -18,13 +10,11 @@ ul.menu li {
 ul.menu li {
   margin: 0;
 }
-.item-list ul li.collapsed,
-ul.menu li.collapsed {
+li.collapsed {
   list-style-image: url(../../../../misc/menu-collapsed.png);
   list-style-type: disc;
 }
-.item-list ul li.expanded,
-ul.menu li.expanded {
+li.expanded {
   list-style-image: url(../../../../misc/menu-expanded.png);
   list-style-type: circle;
 }
diff --git a/core/themes/seven/css/components/tables.css b/core/themes/seven/css/components/tables.css
index 8242d85..14e1c92 100644
--- a/core/themes/seven/css/components/tables.css
+++ b/core/themes/seven/css/components/tables.css
@@ -93,7 +93,7 @@ th.active > a:focus:after,
 th.active > a:hover:after {
   border-bottom-color: #008ee6;
 }
-td .item-list ul {
+td ul {
   margin: 0;
 }
 td.active {
diff --git a/core/themes/seven/css/components/views-ui.css b/core/themes/seven/css/components/views-ui.css
index ed33366..d6a159f 100644
--- a/core/themes/seven/css/components/views-ui.css
+++ b/core/themes/seven/css/components/views-ui.css
@@ -93,8 +93,8 @@ details.fieldset-no-legend {
 
 /* @group Lists */
 
-.views-admin ul.secondary,
-.views-admin .item-list ul {
+.views-admin ul,
+.views-admin ul.secondary {
   margin: 0;
   padding: 0;
 }