diff --git a/core/tests/Drupal/Tests/LegacyBrowserTestBase.php b/core/tests/Drupal/Tests/LegacyBrowserTestBase.php
new file mode 100644
index 0000000..49125dd
--- /dev/null
+++ b/core/tests/Drupal/Tests/LegacyBrowserTestBase.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace Drupal\Tests;
+
+use Behat\Mink\Driver\GoutteDriver;
+use Behat\Mink\Element\Element;
+use Behat\Mink\Mink;
+use Behat\Mink\Selector\SelectorsHandler;
+use Behat\Mink\Session;
+use Drupal\Component\FileCache\FileCacheFactory;
+use Drupal\Component\Serialization\Json;
+use Drupal\Component\Utility\Html;
+use Drupal\Component\Utility\SafeMarkup;
+use Drupal\Component\Utility\UrlHelper;
+use Drupal\Core\Cache\Cache;
+use Drupal\Core\Config\Testing\ConfigSchemaChecker;
+use Drupal\Core\Database\Database;
+use Drupal\Core\DrupalKernel;
+use Drupal\Core\Serialization\Yaml;
+use Drupal\Core\Session\AccountInterface;
+use Drupal\Core\Session\AnonymousUserSession;
+use Drupal\Core\Session\UserSession;
+use Drupal\Core\Site\Settings;
+use Drupal\Core\StreamWrapper\StreamWrapperInterface;
+use Drupal\Core\Test\TestRunnerKernel;
+use Drupal\Core\Url;
+use Drupal\Core\Utility\Error;
+use Drupal\Core\Test\TestDatabase;
+use Drupal\FunctionalTests\AssertLegacyTrait;
+use Drupal\simpletest\AssertHelperTrait;
+use Drupal\simpletest\ContentTypeCreationTrait;
+use Drupal\simpletest\BlockCreationTrait;
+use Drupal\simpletest\NodeCreationTrait;
+use Drupal\simpletest\UserCreationTrait;
+use Symfony\Component\CssSelector\CssSelectorConverter;
+use Symfony\Component\HttpFoundation\Request;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+
+/**
+ * Adds a browser test base, which includes every possible BC layer.
+ */
+abstract class LegacyBrowserTestBase extends BrowserTestBase  {
+
+}