diff --git a/core/modules/system/src/Tests/Render/RenderCacheTest.php b/core/modules/system/src/Tests/Render/RenderCacheTest.php
new file mode 100644
index 0000000..1d08d96
--- /dev/null
+++ b/core/modules/system/src/Tests/Render/RenderCacheTest.php
@@ -0,0 +1,75 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\system\Tests\Render\RenderCacheTest.
+ */
+
+namespace Drupal\system\Tests\Render;
+
+use Drupal\simpletest\WebTestBase;
+use Drupal\user\Entity\User;
+
+/**
+ * Tests the caching of render items via functional tests.
+ *
+ * @group Render
+ */
+class RenderCacheTest extends WebTestBase {
+
+  /**
+   * Tests the caching of render items.
+   */
+  public function testDrupalRenderCache() {
+    // Force a request via GET.
+    $request_method = \Drupal::request()->getMethod();
+    \Drupal::request()->setMethod('GET');
+
+    // Test that user 1 does not share the cache with other users who have the
+    // same roles, even when using a role-based cache context.
+    $user1 = User::load(1);
+    $first_authenticated_user = $this->drupalCreateUser();
+    $second_authenticated_user = $this->drupalCreateUser();
+    $this->assertEqual($user1->getRoles(), $first_authenticated_user->getRoles(), 'User 1 has the same roles as an authenticated user.');
+    // Impersonate user 1 and render content that only user 1 should have
+    // permission to see.
+    \Drupal::service('account_switcher')->switchTo($user1);
+    $test_element = array(
+      '#cache' => array(
+        'keys' => array('test'),
+        'contexts' => array('user.roles'),
+      ),
+    );
+    $element = $test_element;
+    $element['#markup'] = 'content for user 1';
+    $output = \Drupal::service('renderer')->render($element);
+    $this->assertEqual($output, 'content for user 1');
+    // Verify the cache is working by rendering the same element but with
+    // different markup passed in; the result should be the same.
+    $element = $test_element;
+    $element['#markup'] = 'should not be used';
+    $output = \Drupal::service('renderer')->render($element);
+    $this->assertEqual($output, 'content for user 1');
+    \Drupal::service('account_switcher')->switchBack();
+    // Verify that the first authenticated user does not see the same content
+    // as user 1.
+    \Drupal::service('account_switcher')->switchTo($first_authenticated_user);
+    $element = $test_element;
+    $element['#markup'] = 'content for authenticated users';
+    $output = \Drupal::service('renderer')->render($element);
+    $this->assertEqual($output, 'content for authenticated users');
+    \Drupal::service('account_switcher')->switchBack();
+    // Verify that the second authenticated user shares the cache with the
+    // first authenticated user.
+    \Drupal::service('account_switcher')->switchTo($second_authenticated_user);
+    $element = $test_element;
+    $element['#markup'] = 'should not be used';
+    $output = \Drupal::service('renderer')->render($element);
+    $this->assertEqual($output, 'content for authenticated users');
+    \Drupal::service('account_switcher')->switchBack();
+
+    // Restore the previous request method.
+    \Drupal::request()->setMethod($request_method);
+  }
+
+}