reverted:
--- b/core/modules/views/src/Tests/Plugin/PluginResultTest.php
+++ /dev/null
@@ -1,34 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\views\Tests\Plugin\PluginResultTest.
- */
-
-namespace Drupal\views\Tests\Plugin;
-
-use Drupal\Component\Utility\Xss;
-
-/**
- * Tests the Views Area Result class.
- *
- * @group views
- */
-class PluginResultTest extends PluginTestBase {
-
-  public function setUp() {
-    parent::setUp();
-  }
-
-  public function testResultAdminFilter() {
-
-    $content = '<style /><iframe /><frame /><frameset /><meta /><link /><embed /><applet /><param /><layer /><a></a>';
-    $render_array = array('#markup' => $content);
-
-    $xss_filtered_output = Xss::filterAdmin($content);
-    $renderer_filtered_output = \Drupal::service('renderer')->renderRoot($render_array);
-
-    $this->assertEqual($xss_filtered_output, $renderer_filtered_output);
-  }
-
-}
only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/views/src/Tests/Handler/AreaResultTest.php
@@ -0,0 +1,42 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\views\Tests\Handler\AreaResultTest.
+ */
+
+namespace Drupal\views\Tests\Handler;
+
+use Drupal\views\Tests\ViewKernelTestBase;
+use Drupal\views\Views;
+
+/**
+ * Tests the Views Area Result class.
+ *
+ * @group views
+ * @see \Drupal\views\Plugin\views\area\Result
+ */
+class AreaResultTest extends ViewKernelTestBase {
+  /**
+   * Views used by this test.
+   *
+   * @var array
+   */
+  public static $testViews = array('test_area_result');
+
+  public function testAreaResult() {
+    $view = Views::getView('test_area_result');
+    $this->executeView($view);
+
+    $handler = $view->display_handler->handlers['header']['result'];
+    $render = $handler->render();
+
+    $renderer = $this->container->get('renderer');
+    $output = $renderer->renderRoot($render);
+
+    // Expect the script tag to be stripped.
+    $expected = "<a>A</a>";
+    $this->assertEqual($expected, $output);
+  }
+
+}
only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/views/tests/modules/views_test_config/test_views/views.view.test_area_result.yml
@@ -0,0 +1,39 @@
+langcode: en
+status: true
+dependencies: {  }
+id: test_area_result
+label: ''
+module: views
+description: ''
+tag: ''
+base_table: views_test_data
+base_field: id
+core: 8.x
+display:
+  default:
+    display_options:
+      pager:
+        options:
+          offset: 0
+        type: none
+      fields:
+        id:
+          field: id
+          id: id
+          relationship: none
+          table: views_test_data
+          plugin_id: numeric
+      header:
+        result:
+          id: result
+          table: views
+          field: result
+          relationship: none
+          group_type: group
+          admin_label: ''
+          empty: false
+          content: '<script /><a>A</a>'
+          plugin_id: result
+    display_plugin: default
+    display_title: Master
+    position: 0