diff --git a/tests/src/Functional/FillPdfSettingsFormTest.php b/tests/src/Functional/FillPdfSettingsFormTest.php
index b57dbeaa62922aa5ccf03067d43ffbc4c5bac18a..d60ecfa0c5dbf4042c3e0c625b786ba218b92089 100644
--- a/tests/src/Functional/FillPdfSettingsFormTest.php
+++ b/tests/src/Functional/FillPdfSettingsFormTest.php
@@ -19,14 +19,6 @@ class FillPdfSettingsFormTest extends BrowserTestBase {
 
   use TestFillPdfTrait;
 
-  /**
-   * Set to FALSE to suppress checking all configuration saved.
-   *
-   * @var bool
-   * @see \Drupal\Core\Config\Development\ConfigSchemaChecker
-   */
-  protected $strictConfigSchema = FALSE;
-
   /**
    * {@inheritdoc}
    */