diff --git a/core/includes/bootstrap.inc b/core/includes/bootstrap.inc
index 805c998..18635a6 100644
--- a/core/includes/bootstrap.inc
+++ b/core/includes/bootstrap.inc
@@ -553,7 +553,6 @@ function watchdog_exception($type, Exception $exception, $message = NULL, $varia
  *   @endcode
  *   If there are no messages set, the function returns NULL.
  *
- *
  * @throws \UnexpectedValueException
  *   When passed a render array with #attached.
  *
@@ -577,8 +576,8 @@ function drupal_set_message($message = NULL, $type = 'status', $repeat = FALSE)
     // (like assets) should not be supported.
     if (is_array($message)) {
       $rendered_message = \Drupal::service('renderer')->renderPlain($message);
-      // The rendering will have bubbled any #attached asserts to the top
-      // level of $message. Throw an exception if there were any.
+      // The rendering will have bubbled any #attached assets to the top level
+      // of $message. Throw an exception if there were any.
       if (!empty($message['#attached'])) {
         throw new \UnexpectedValueException('Render arrays passed to drupal_set_message() cannot have attached assets.');
       }
diff --git a/core/modules/system/src/Tests/Bootstrap/DrupalSetMessageTest.php b/core/modules/system/src/Tests/Bootstrap/DrupalSetMessageTest.php
index 3f442a8..85a66e0 100644
--- a/core/modules/system/src/Tests/Bootstrap/DrupalSetMessageTest.php
+++ b/core/modules/system/src/Tests/Bootstrap/DrupalSetMessageTest.php
@@ -58,12 +58,7 @@ function testDrupalSetMessage() {
 
     // Ensure that strings that are not marked as safe are escaped.
     $this->assertEscaped('<em>This<span>markup will be</span> escaped</em>.');
-  }
 
-  /**
-   * Tests drupal_set_message() with disallowed #attach.
-   */
-  public function testAttach() {
     // Test render arrays that incorrectly add #attached.
     try {
       drupal_set_message(['#attached' => ['drupalSettings' => ['pecary' => TRUE]]]);
@@ -83,7 +78,6 @@ public function testAttach() {
     catch (\UnexpectedValueException $e) {
       $this->pass('Render arrays passed to drupal_set_message() cannot have attached assets in child elements.');
     }
-
   }
 
 }