Update to drupal-org-drupal 8.0.0-rc2. For more information, see https://www.drupal.org/node/2598668

vendor/behat/mink-goutte-driver/tests/Custom/InstantiationTest.php

@@ -1,27 +0,0 @@
-<?php
-
-namespace Behat\Mink\Tests\Driver\Custom;
-
-use Behat\Mink\Driver\GoutteDriver;
-
-class InstantiationTest extends \PHPUnit_Framework_TestCase
-{
-    public function testInstantiateWithClient()
-    {
-        $client = $this->getMockBuilder('Goutte\Client')->disableOriginalConstructor()->getMock();
-        $client->expects($this->once())
-            ->method('followRedirects')
-            ->with(true);
-
-        $driver = new GoutteDriver($client);
-
-        $this->assertSame($client, $driver->getClient());
-    }
-
-    public function testInstantiateWithoutClient()
-    {
-        $driver = new GoutteDriver();
-
-        $this->assertInstanceOf('Behat\Mink\Driver\Goutte\Client', $driver->getClient());
-    }
-}

vendor/behat/mink-goutte-driver/tests/GoutteConfig.php

@@ -1,26 +0,0 @@
-<?php
-
-namespace Behat\Mink\Tests\Driver;
-
-use Behat\Mink\Driver\GoutteDriver;
-
-class GoutteConfig extends AbstractConfig
-{
-    public static function getInstance()
-    {
-        return new self();
-    }
-
-    /**
-     * {@inheritdoc}
-     */
-    public function createDriver()
-    {
-        return new GoutteDriver();
-    }
-
-    protected function supportsJs()
-    {
-        return false;
-    }
-}