diff --git a/core/modules/system/src/Tests/Menu/MenuRouterTest.php b/core/modules/system/src/Tests/Menu/MenuRouterTest.php
index 4089931..d75bd6c 100644
--- a/core/modules/system/src/Tests/Menu/MenuRouterTest.php
+++ b/core/modules/system/src/Tests/Menu/MenuRouterTest.php
@@ -296,19 +296,19 @@ protected function doTestThemeCallbackMaintenanceMode() {
    */
   protected function doTestThemeCallbackOptionalTheme() {
     // Request a theme that is not installed.
-    $this->drupalGet('menu-test/theme-callback/use-stark-theme');
+    $this->drupalGet('menu-test/theme-callback/use-test-theme');
     $this->assertText('Active theme: bartik. Actual theme: bartik.', 'The theme negotiation system falls back on the default theme when a theme that is not installed is requested.');
     $this->assertRaw('bartik/css/base/elements.css', "The default theme's CSS appears on the page.");
 
     // Now install the theme and request it again.
     $theme_handler = $this->container->get('theme_handler');
-    $theme_handler->install(array('stark'));
+    $theme_handler->install(array('test_theme'));
 
-    $this->drupalGet('menu-test/theme-callback/use-stark-theme');
-    $this->assertText('Active theme: stark. Actual theme: stark.', 'The theme negotiation system uses an optional theme once it has been installed.');
-    $this->assertRaw('stark/css/layout.css', "The optional theme's CSS appears on the page.");
+    $this->drupalGet('menu-test/theme-callback/use-test-theme');
+    $this->assertText('Active theme: test_theme. Actual theme: test_theme.', 'The theme negotiation system uses an optional theme once it has been installed.');
+    $this->assertRaw('test_theme/kitten.css', "The optional theme's CSS appears on the page.");
 
-    $theme_handler->uninstall(array('stark'));
+    $theme_handler->uninstall(array('test_theme'));
   }
 
   /**
diff --git a/core/modules/system/src/Tests/Theme/ThemeInfoTest.php b/core/modules/system/src/Tests/Theme/ThemeInfoTest.php
index 3d376ed..55c71e6 100644
--- a/core/modules/system/src/Tests/Theme/ThemeInfoTest.php
+++ b/core/modules/system/src/Tests/Theme/ThemeInfoTest.php
@@ -94,13 +94,13 @@ public function testChanges() {
     $active_theme = $this->themeManager->getActiveTheme();
     // Make sure we are not testing the wrong theme.
     $this->assertEqual('test_theme', $active_theme->getName());
-    $this->assertEqual(['classy/base'], $active_theme->getLibraries());
+    $this->assertEqual(['classy/base', 'test_theme/global-styling'], $active_theme->getLibraries());
 
     // @see theme_test_system_info_alter()
     $this->state->set('theme_test.modify_info_files', TRUE);
     drupal_flush_all_caches();
     $active_theme = $this->themeManager->getActiveTheme();
-    $this->assertEqual(['classy/base', 'core/backbone'], $active_theme->getLibraries());
+    $this->assertEqual(['classy/base', 'test_theme/global-styling', 'core/backbone'], $active_theme->getLibraries());
   }
 
 }
diff --git a/core/modules/system/tests/modules/menu_test/src/Theme/TestThemeNegotiator.php b/core/modules/system/tests/modules/menu_test/src/Theme/TestThemeNegotiator.php
index b4cdd0a..2d8c5f3 100644
--- a/core/modules/system/tests/modules/menu_test/src/Theme/TestThemeNegotiator.php
+++ b/core/modules/system/tests/modules/menu_test/src/Theme/TestThemeNegotiator.php
@@ -35,8 +35,8 @@ public function determineActiveTheme(RouteMatchInterface $route_match) {
       return \Drupal::config('system.theme')->get('admin');
     }
     // Test using a theme that exists, but may or may not be installed.
-    elseif ($argument == 'use-stark-theme') {
-      return 'stark';
+    elseif ($argument == 'use-test-theme') {
+      return 'test_theme';
     }
     // Test using a theme that does not exist.
     elseif ($argument == 'use-fake-theme') {
diff --git a/core/modules/system/tests/themes/test_theme/test_theme.info.yml b/core/modules/system/tests/themes/test_theme/test_theme.info.yml
index 7ddcb2d..e9d6602 100644
--- a/core/modules/system/tests/themes/test_theme/test_theme.info.yml
+++ b/core/modules/system/tests/themes/test_theme/test_theme.info.yml
@@ -16,6 +16,8 @@ base theme: classy
 core: 8.x
 stylesheets-remove:
   - '@system/css/system.module.css'
+libraries:
+  - test_theme/global-styling
 regions:
   content: Content
   left: Left
diff --git a/core/themes/stark/README.txt b/core/themes/stark/README.txt
index 141a3d0..552261a 100644
--- a/core/themes/stark/README.txt
+++ b/core/themes/stark/README.txt
@@ -10,9 +10,7 @@ default markup without the interference of changes commonly made by more
 complex themes.
 
 To avoid obscuring CSS added to the page by Drupal or a contrib module, the
-Stark theme itself has no styling, except just enough CSS to arrange the page
-in a traditional "Header, sidebars, content, and footer" layout. See the
-layout.css file for more information.
+Stark theme itself has no styling.
 
 
 ABOUT DRUPAL THEMING
diff --git a/core/themes/stark/css/layout.css b/core/themes/stark/css/layout.css
index 486014b..e69de29 100644
--- a/core/themes/stark/css/layout.css
+++ b/core/themes/stark/css/layout.css
@@ -1,123 +0,0 @@
-/**
- * @file
- * Stark layout method
- *
- * To avoid obscuring CSS added to the page by Drupal or a contrib module, the
- * Stark theme itself has no styling, except just enough CSS to arrange the page
- * in a traditional "Header, sidebars, content, and footer" layout.
- *
- * This layout method works reasonably well, but shouldn't be used on a
- * production site because it can break. For example, if an over-large image
- * (one that is wider than 20% of the viewport) is in the left sidebar, the
- * image will overlap with the .layout-content to the right.
- */
-img {
-  height: auto;
-  max-width: 100%;
-}
-main:after {
-  content: "";
-  display: table;
-  clear: both;
-}
-
-.layout-content,
-.layout-sidebar-first,
-.layout-sidebar-second {
-  display: inline;
-  position: relative;
-}
-
-details,
-summary {
-  display: block;
-}
-
-@media all and (min-width: 480px) and (max-width: 959px) {
-  .layout-content {
-    width: 67%;
-    float: right; /* LTR */
-  }
-  [dir="rtl"] .layout-content {
-    float: left;
-  }
-
-  .layout-sidebar-first {
-    width: 33%;
-    float: left; /* LTR */
-  }
-  [dir="rtl"] .layout-sidebar-first {
-    float: right;
-  }
-
-  .layout-sidebar-second {
-    float: right; /* LTR */
-    clear: both;
-    width: 100%;
-  }
-  [dir="rtl"] .layout-sidebar-second {
-    float: right;
-    clear: right;
-  }
-
-  .layout-sidebar-second .block {
-    float: left; /* LTR */
-    width: 33%;
-  }
-  [dir="rtl"] .layout-sidebar-second .block {
-    float: right;
-  }
-  .layout-sidebar-second .block:nth-child(3n+1) {
-    clear: both;
-  }
-}
-
-@media all and (min-width: 960px) {
-  .layout-content {
-    width: 60%;
-    float: left; /* LTR */
-    left: 20%; /* LTR */
-  }
-  [dir="rtl"] .layout-content {
-    float: right;
-    left: 0;
-    right: 20%;
-  }
-
-  .layout-sidebar-first {
-    width: 20%;
-    float: left; /* LTR */
-    left: -60%; /* LTR */
-  }
-  [dir="rtl"] .layout-sidebar-first {
-    float: right;
-    left: 0;
-    right: -60%;
-  }
-
-  .layout-sidebar-second {
-    float: right; /* LTR */
-    width: 20%;
-  }
-  [dir="rtl"] .layout-sidebar-second {
-    float: left;
-  }
-}
-
-/**
- * Responsive tables.
- */
-@media screen and (max-width:28.125em) { /* 450px */
-  th.priority-low,
-  td.priority-low,
-  th.priority-medium,
-  td.priority-medium {
-    display: none;
-  }
-}
-@media screen and (max-width:45em) { /* 720px */
-  th.priority-low,
-  td.priority-low {
-    display: none;
-  }
-}
diff --git a/core/themes/stark/stark.info.yml b/core/themes/stark/stark.info.yml
index 69337d5..70609c1 100644
--- a/core/themes/stark/stark.info.yml
+++ b/core/themes/stark/stark.info.yml
@@ -1,10 +1,6 @@
 name: Stark
 type: theme
-description: 'An intentionally plain theme with almost no styling to demonstrate default Drupal’s HTML and CSS. Learn how to build a custom theme from Stark in the <a href="https://www.drupal.org/theme-guide">Theming Guide</a>.'
+description: 'An intentionally plain theme with no styling to demonstrate default Drupal’s HTML and CSS. Learn how to build a custom theme from Stark in the <a href="https://www.drupal.org/theme-guide">Theming Guide</a>.'
 package: Core
 version: VERSION
 core: 8.x
-libraries:
-  - stark/global-styling
-stylesheets-remove:
-  - core/assets/vendor/normalize-css/normalize.css
