Fatal error: Uncaught Error: Class "Drupal\Tests\language\Functional\Rest\ConfigurableLanguageResourceTestBase" not found in /home/www/drupal8/test/core/modules/language/tests/src/Functional/Hal/ConfigurableLanguageHalJsonCookieTest.php:11
Stack trace:
#0 {main}
thrown in /home/www/drupal8/test/core/modules/language/tests/src/Functional/Hal/ConfigurableLanguageHalJsonCookieTest.php on line 11