Fatal error: Uncaught Error: Class "Drupal\Tests\taxonomy\Functional\TaxonomyTestBase" not found in /home/www/drupal8/test/core/modules/taxonomy/tests/src/Functional/EfqTest.php:10
Stack trace:
#0 {main}
thrown in /home/www/drupal8/test/core/modules/taxonomy/tests/src/Functional/EfqTest.php on line 10