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