0a1,13
> diff --git a/core/modules/big_pipe/src/Tests/BigPipePlaceholderTestCases.php b/core/modules/big_pipe/src/Tests/BigPipePlaceholderTestCases.php
> index 1cf10d4..49719ec 100644
> --- a/core/modules/big_pipe/src/Tests/BigPipePlaceholderTestCases.php
> +++ b/core/modules/big_pipe/src/Tests/BigPipePlaceholderTestCases.php
> @@ -110,7 +110,7 @@ public static function cases(ContainerInterface $container = NULL, AccountInterf
>            'command' => 'insert',
>            'method' => 'replaceWith',
>            'selector' => '[data-big-pipe-placeholder-id="callback=Drupal%5CCore%5CRender%5CElement%5CStatusMessages%3A%3ArenderMessages&args[0]&token=a8c34b5e"]',
> -          'data' => "\n" . '    <div role="contentinfo" aria-label="Status message" class="messages messages--status">' . "\n" . '                  <h2 class="visually-hidden">Status message</h2>' . "\n" . '                    Hello from BigPipe!' . "\n" . '            </div>' . "\n    \n",
> +          'data' => "\n" . '    <div role="contentinfo" aria-label="Status message" class="messages messages--status">' . "\n" . '                  <h2 class="visually-hidden">Status message</h2>' . "\n" . '                    Hello from BigPipe!' . "\n" . '            </div>' . "\n    ",
>            'settings' => NULL,
>          ],
>        ];
72c85
< index 683a111..e98964e 100644
---
> index 683a111..bc8fd10 100644
75,76c88
< @@ -50,7 +50,5 @@
<        </div>
---
> @@ -51,6 +51,6 @@
79c91
< -  {# Remove type specific classes. #}
---
>    {# Remove type specific classes. #}
80a93
> +  {% set attributes = attributes.removeClass(classes) %}