Brad Jones
--- a/core/modules/system/tests/modules/router_test_directory/src/RouterTestEarlyExceptionSubscriber.php 0 → 100644
+++ b/core/modules/system/tests/modules/router_test_directory/src/RouterTestEarlyExceptionSubscriber.php 0 → 100644
+
+  /**
+   * Throw an exception, which will trigger exception-handling subscribers
+   * in core, namely DefaultExceptionHtmlSubscriber.
+   */
+  public function onKernelRequest(GetResponseEvent $event) {
+    if ($event->isMainRequest() && $event->getRequest()->headers->get('Authorization') === 'Bearer invalid') {
+      throw new HttpException(
+        Response::HTTP_UNAUTHORIZED,
+        'This is a common exception during authentication.'
+      );
+    }
+  }
+
+  /**
+   * @inheritDoc
-   * @inheritDoc
+   * {@inheritdoc}
--- a/core/tests/Drupal/FunctionalTests/Routing/RouteCachingQueryAlteredTest.php 0 → 100644
+++ b/core/tests/Drupal/FunctionalTests/Routing/RouteCachingQueryAlteredTest.php 0 → 100644
+ *
+ * @group language
+ */
+class RouteCachingQueryAlteredTest extends BrowserTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  protected static $modules = ['router_test'];
+
+  protected $defaultTheme = 'stark';
+
+  /**
+   * @inheritDoc
-   * @inheritDoc
+   * {@inheritdoc}