diff --git a/core/lib/Drupal/Core/Render/MainContent/AjaxRenderer.php b/core/lib/Drupal/Core/Render/MainContent/AjaxRenderer.php
index b6a0850..8ad3862 100644
--- a/core/lib/Drupal/Core/Render/MainContent/AjaxRenderer.php
+++ b/core/lib/Drupal/Core/Render/MainContent/AjaxRenderer.php
@@ -68,8 +68,7 @@ public function renderResponse(array $main_content, Request $request, RouteMatch
     $response->addCommand(new InsertCommand(NULL, $html));
     $status_messages = array('#type' => 'status_messages');
     $output = $this->drupalRenderRoot($status_messages);
-    $output_trimmed = trim($output);
-    if (!empty($output_trimmed) && $output_trimmed != '') {
+    if (trim($output) != '') {
       // There are messages so output them exactly as the theme renders them.
       $response->addCommand(new PrependCommand(NULL, $output));
     }