diff -u b/core/tests/Drupal/Tests/Core/Batch/BatchNotFoundTest.php b/core/tests/Drupal/Tests/Core/Batch/BatchNotFoundTest.php
--- b/core/tests/Drupal/Tests/Core/Batch/BatchNotFoundTest.php
+++ b/core/tests/Drupal/Tests/Core/Batch/BatchNotFoundTest.php
@@ -10,7 +10,7 @@
 use Drupal\simpletest\WebTestBase;
 
 /**
- * Tests if Drupal returns page not found error when batch Id does not exist.
+ * Tests if Drupal returns page not found error when batch ID does not exist.
  *
  * @group Batch
  */
@@ -35,7 +35,7 @@
   /**
    * Tests for page not found error if batch ID does not exist.
    */
-  function testBatchNotFound() {
+  public function testBatchNotFound() {
     $this->drupalLogin($this->user);
 
     $batch_id = mt_rand(0, 1000);
@@ -47,7 +47,7 @@
       ),
     ));
 
-    $this->assertResponse(404, 'The requested page could not be found. ');
+    $this->assertResponse(404);
   }
 
 }