Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/symfony-cmf/routing/Tests/bootstrap.php

@@ -0,0 +1,20 @@
+<?php
+
+$file = __DIR__.'/../vendor/autoload.php';
+if (!file_exists($file)) {
+    throw new RuntimeException('Install dependencies to run test suite.');
+}
+
+require_once $file;
+
+spl_autoload_register(function ($class) {
+    if (0 === strpos($class, 'Symfony\Cmf\Component\Routing\\')) {
+        $path = __DIR__.'/../'.implode('/', array_slice(explode('\\', $class), 4)).'.php';
+        if (!stream_resolve_include_path($path)) {
+            return false;
+        }
+        require_once $path;
+
+        return true;
+    }
+});