Issue #2222315 by alexpott: Random fail in \Drupal\system\Tests\Common\RenderTest.
Issue #2221535 by Cottser, joelpittet: TwigNodeVisitor's priority is too early and breaks some filters and macros.
Issue #2221929 by tstoeckler: ConfigNormalizerTest.php is misnamed.
Issue #1806538 by joelpittet, Cottser: Remove @todo about enabling strict_variables in Twig.