>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3514236. --> Reported by: [murz](https://www.drupal.org/user/157092) Related to !70 >>> <h3 id="summary-problem-motivation">Problem/Motivation</h3> <p>To prevent undetected JS errors, would be good to add a check in tests that they are missing.</p> <p>We already have a Drupal module "js_testing_log_test" that writes all errors to the State during Nigtwatch tests, so seems we can read the collected data and fail the test if they are present.</p>