diff --git a/core/tests/Drupal/Tests/Core/StringTranslation/TranslationWrapperTest.php b/core/tests/Drupal/Tests/Core/StringTranslation/TranslationWrapperTest.php
index 3a5ce97..8f99198 100644
--- a/core/tests/Drupal/Tests/Core/StringTranslation/TranslationWrapperTest.php
+++ b/core/tests/Drupal/Tests/Core/StringTranslation/TranslationWrapperTest.php
@@ -1,10 +1,10 @@
 <?php
 /**
  * @file
- * Contains \Drupal\Tests\Component\Utility\TranslationWrapperTest.
+ * Contains \Drupal\Tests\Core\StringTranslation\TranslationWrapperTest.
  */
 
-namespace Drupal\Tests\Component\Utility;
+namespace Drupal\Tests\Core\StringTranslation;
 
 use Drupal\Tests\UnitTestCase;
 use Drupal\Core\StringTranslation\TranslationWrapper;
@@ -13,7 +13,7 @@
  * Tests the TranslationWrapper class.
  *
  * @coversDefaultClass \Drupal\Core\StringTranslation\TranslationWrapper
- * @group Utility
+ * @group StringTranslation
  */
 class TranslationWrapperTest extends UnitTestCase {
 
@@ -47,7 +47,7 @@ public function errorHandler($error_number, $error_message) {
   /**
    * Tests that errors are correctly handled when a __toString() fails.
    *
-   * @covers ::__toString()
+   * @covers ::__toString
    */
   public function testToString() {
     $text = new TranslationWrapper('May I have an exception please?');
@@ -55,18 +55,19 @@ public function testToString() {
     $translation = $this->getMock('Drupal\Core\StringTranslation\TranslationInterface');
     $translation->expects($this->any())
       ->method('translate')
-      ->willReturnCallback(function ($string, array $args = [], array $options = []) {
+      ->willReturnCallback(function () {
         throw new \Exception('Yes you may.');
       });
     $text->setStringTranslation($translation);
 
     set_error_handler(array($this, "errorHandler"));
     // We want this to trigger an error.
-    (string) $text;
+    $result = (string) $text;
     restore_error_handler();
 
     $this->assertEquals(E_USER_NOTICE, $this->lastErrorNumber);
     $this->assertRegExp('/An exception was thrown while calling __toString on a .*\TranslationWrapper object in .* on line [0-9]+: Yes you may./', $this->lastErrorMessage);
+    $this->assertSame('', $result);
   }
 
 }