commit 64fe66b592022afcb44ed19b7d29d1c7c7f96a9b
Author: Joel Pittet <joel@pittet.ca>
Date:   Mon Aug 17 18:32:41 2015 -0700

    fix

diff --git a/core/modules/system/src/Tests/Form/ValidationTest.php b/core/modules/system/src/Tests/Form/ValidationTest.php
index 5540c72..d2e31c9 100644
--- a/core/modules/system/src/Tests/Form/ValidationTest.php
+++ b/core/modules/system/src/Tests/Form/ValidationTest.php
@@ -291,7 +291,8 @@ protected function assertErrorMessages($messages) {
       // Gather the element for checking the jump link section.
       $error_links[] = \Drupal::l($message['title'], Url::fromRoute('<none>', [], ['fragment' => 'edit-' . str_replace('_', '-', $message['key']), 'external' => TRUE]));
     }
-    $this->assertRaw('1 error has been found:', $error_links);
+    $top_message = \Drupal::translation()->formatPlural(count($error_links), '1 error has been found:', '@count errors have been found:');
+    $this->assertRaw($top_message);
     $this->assertNoText('An illegal choice has been detected. Please contact the site administrator.');
     foreach ($error_links as $link) {
       $this->assertRaw($link);