.../standard/tests/src/Functional/StandardTest.php | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/core/profiles/standard/tests/src/Functional/StandardTest.php b/core/profiles/standard/tests/src/Functional/StandardTest.php
index bd43f39b9c..232a7ee698 100644
--- a/core/profiles/standard/tests/src/Functional/StandardTest.php
+++ b/core/profiles/standard/tests/src/Functional/StandardTest.php
@@ -2,7 +2,9 @@
 
 namespace Drupal\Tests\standard\Functional;
 
+use Drupal\ckeditor5\Plugin\Editor\CKEditor5;
 use Drupal\Component\Utility\Html;
+use Drupal\editor\Entity\Editor;
 use Drupal\media\Entity\MediaType;
 use Drupal\media\Plugin\media\Source\Image;
 use Drupal\Tests\SchemaCheckTestTrait;
@@ -13,6 +15,7 @@
 use Drupal\Tests\BrowserTestBase;
 use Drupal\Tests\RequirementsPageTrait;
 use Drupal\user\Entity\Role;
+use Symfony\Component\Validator\ConstraintViolation;
 
 /**
  * Tests Standard installation profile expectations.
@@ -106,6 +109,25 @@ public function testStandard() {
       $this->assertConfigSchema($typed_config, $name, $config->get());
     }
 
+    // Validate all configuration.
+    // @todo Generalize in https://www.drupal.org/project/drupal/issues/2164373
+    foreach (Editor::loadMultiple() as $editor) {
+      // Currently only text editors using CKEditor 5 can be validated.
+      if ($editor->getEditor() !== 'ckeditor5') {
+        continue;
+      }
+
+      $this->assertSame([], array_map(
+        function (ConstraintViolation $v) {
+          return (string) $v->getMessage();
+        },
+        iterator_to_array(CKEditor5::validatePair(
+          $editor,
+          $editor->getFilterFormat()
+        ))
+      ));
+    }
+
     // Ensure that configuration from the Standard profile is not reused when
     // enabling a module again since it contains configuration that can not be
     // installed. For example, editor.editor.basic_html is editor configuration