>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3171973. --> Reported by: [sj3](https://www.drupal.org/user/3087133) >>> <h3 id="summary-problem-motivation">Problem/Motivation</h3> <p>Drupal 8 provides a <a href="https://api.drupal.org/api/drupal/core!lib!Drupal!Core!Config!Testing!ConfigSchemaChecker.php/class/ConfigSchemaChecker/8.2.x">config schema checker</a> during the tests, listens to the config save event and validates schema.<br> The config schema checker for this module is failing:</p> <p>Drupal\Core\Config\Schema\SchemaIncompleteException: Schema errors for formtips.settings with the following errors: formtips.settings:_core missing schema, formtips.settings:langcode missing schema<br> /var/www/html/web/core/lib/Drupal/Core/Config/Development/ConfigSchemaChecker.php:95<br> /var/www/html/web/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php:111<br> /var/www/html/web/core/lib/Drupal/Core/Config/Config.php:231<br> /var/www/html/web/core/lib/Drupal/Core/Config/ConfigInstaller.php:378<br> /var/www/html/web/core/lib/Drupal/Core/Config/ConfigInstaller.php:137<br> /var/www/html/web/core/lib/Drupal/Core/ProxyClass/Config/ConfigInstaller.php:75<br> /var/www/html/web/core/lib/Drupal/Core/Extension/ModuleInstaller.php:287<br> /var/www/html/web/core/lib/Drupal/Core/ProxyClass/Extension/ModuleInstaller.php:83<br> /var/www/html/web/core/lib/Drupal/Core/Test/FunctionalTestSetupTrait.php:476<br> /var/www/html/web/core/tests/Drupal/Tests/BrowserTestBase.php:578<br> /var/www/html/web/core/tests/Drupal/Tests/BrowserTestBase.php:406</p> <h4 id="summary-steps-reproduce">Steps to reproduce</h4> <h3 id="summary-proposed-resolution">Proposed resolution</h3> <p>In config/schema/formtips.schema.yml change the formtips.settings type from mapping to config_object</p>