diff --git a/core/modules/ckeditor/src/CKEditorPluginManager.php b/core/modules/ckeditor/src/CKEditorPluginManager.php
index 07d811f..e95c300 100644
--- a/core/modules/ckeditor/src/CKEditorPluginManager.php
+++ b/core/modules/ckeditor/src/CKEditorPluginManager.php
@@ -178,7 +178,9 @@ public function injectPluginSettingsForm(array &$form, FormStateInterface $form_
         if ($plugin instanceof CKEditorPluginButtonsInterface && !$plugin instanceof CKEditorPluginContextualInterface) {
           $form['plugins'][$plugin_id]['#attributes']['data-ckeditor-buttons'] = implode(' ', array_keys($plugin->getButtons()));
         }
-        $form['plugins'][$plugin_id] += $plugin->settingsForm($plugin_settings_form, $form_state, $editor);
+        if (!empty($plugin->settingsForm($plugin_settings_form, $form_state, $editor))) {
+          $form['plugins'][$plugin_id] += $plugin->settingsForm($plugin_settings_form, $form_state, $editor);
+        }
       }
     }
   }