diff -u b/core/modules/system/src/Controller/SystemController.php b/core/modules/system/src/Controller/SystemController.php
--- b/core/modules/system/src/Controller/SystemController.php
+++ b/core/modules/system/src/Controller/SystemController.php
@@ -15,6 +15,7 @@
 use Drupal\Core\Menu\MenuLinkTreeInterface;
 use Drupal\Core\Menu\MenuTreeParameters;
 use Drupal\Core\Theme\ThemeAccessCheck;
+use Drupal\Core\Cache;
 use Drupal\Core\Url;
 use Drupal\system\SystemManager;
 use Symfony\Component\DependencyInjection\ContainerInterface;
@@ -67,6 +68,13 @@
   protected $menuLinkTree;
 
   /**
+   * The bootstrap cache service.
+   *
+   * @var \Drupal\Core\Cache\CacheBackendInterface
+   */
+  protected $bootstrapCache;
+
+  /**
    * Constructs a new SystemController.
    *
    * @param \Drupal\system\SystemManager $systemManager
@@ -81,14 +89,17 @@
    *   The theme handler.
    * @param \Drupal\Core\Menu\MenuLinkTreeInterface
    *   The menu link tree service.
+   * @parm \Drupal\Core\Cache\CacheBackendInterface
+   *   The bootstrap cache service.
    */
-  public function __construct(SystemManager $systemManager, QueryFactory $queryFactory, ThemeAccessCheck $theme_access, FormBuilderInterface $form_builder, ThemeHandlerInterface $theme_handler, MenuLinkTreeInterface $menu_link_tree) {
+  public function __construct(SystemManager $systemManager, QueryFactory $queryFactory, ThemeAccessCheck $theme_access, FormBuilderInterface $form_builder, ThemeHandlerInterface $theme_handler, MenuLinkTreeInterface $menu_link_tree, CacheBackendInterface $bootstrap_cache) {
     $this->systemManager = $systemManager;
     $this->queryFactory = $queryFactory;
     $this->themeAccess = $theme_access;
     $this->formBuilder = $form_builder;
     $this->themeHandler = $theme_handler;
     $this->menuLinkTree = $menu_link_tree;
+    $this->bootstrapCache = $bootstrap_cache;
   }
 
   /**
@@ -102,6 +113,7 @@
       $container->get('form_builder'),
       $container->get('theme_handler'),
       $container->get('menu.link_tree')
+      $container->get('cache.bootstrap')
     );
   }
 
@@ -187,7 +199,7 @@
    */
   public function themesPage() {
     //  Clean up the bootstrap "missing files" cache when listing themes.
-    \Drupal::cache('bootstrap')->delete('drupal_get_filename:missing');
+    $this->bootstrapCache->delete('drupal_get_filename:missing');
     drupal_static_reset('drupal_get_filename:missing');
 
     $config = $this->config('system.theme');
diff -u b/core/modules/system/src/Tests/Bootstrap/GetFilenameUnitTest.php b/core/modules/system/src/Tests/Bootstrap/GetFilenameUnitTest.php
--- b/core/modules/system/src/Tests/Bootstrap/GetFilenameUnitTest.php
+++ b/core/modules/system/src/Tests/Bootstrap/GetFilenameUnitTest.php
@@ -80,7 +80,7 @@
         return;
       }
       throw new ErrorException($message, 0, $severity, $file, $line);
-    }
+    });
     // Searching for an item that does not exist returns NULL.
     $this->assertNull(drupal_get_filename('module', $non_existing_module), 'Searching for an item that does not exist returns NULL.');
     // Restore the original error handler.
diff -u b/core/modules/system/src/Tests/Common/AttachedAssetsTest.php b/core/modules/system/src/Tests/Common/AttachedAssetsTest.php
--- b/core/modules/system/src/Tests/Common/AttachedAssetsTest.php
+++ b/core/modules/system/src/Tests/Common/AttachedAssetsTest.php
@@ -81,7 +81,7 @@
         return;
       }
       throw new ErrorException($message, 0, $severity, $file, $line);
-    }
+    });
     $build['#attached']['library'][] = 'unknown/unknown';
     $assets = AttachedAssets::createFromRenderArray($build);