diff --git a/core/tests/Drupal/Tests/Core/Asset/JsOptimizerUnitTest.php b/core/tests/Drupal/Tests/Core/Asset/JsOptimizerUnitTest.php
index c41f653..beb62eb 100644
--- a/core/tests/Drupal/Tests/Core/Asset/JsOptimizerUnitTest.php
+++ b/core/tests/Drupal/Tests/Core/Asset/JsOptimizerUnitTest.php
@@ -5,7 +5,7 @@
  * Contains \Drupal\system\Tests\Asset\JsOptimizerUnitTest.
  */
 
-namespace Drupal\Tests\Core\Asset {
+namespace Drupal\Tests\Core\Asset;
 
 use Drupal\Core\Asset\JsOptimizer;
 use Drupal\Tests\UnitTestCase;
@@ -39,45 +39,25 @@ function providerTestClean() {
       // File. Tests:
       // - Stripped sourceMappingURL with comment # syntax.
       0 => array(
-        array(
-          'type' => 'file',
-          'media' => 'all',
-          'data' => $path . 'source_mapping_url.min.js',
-          'basename' => 'source_mapping_url.min.js',
-        ),
+        file_get_contents($path . 'source_mapping_url.min.js'),
         file_get_contents($path . 'source_mapping_url.min.js.optimized.js'),
       ),
       // File. Tests:
       // - Stripped sourceMappingURL with comment @ syntax.
       1 => array(
-        array(
-          'type' => 'file',
-          'media' => 'all',
-          'data' => $path . 'source_mapping_url_old.min.js',
-          'basename' => 'source_mapping_url_old.min.js',
-        ),
+        file_get_contents($path . 'source_mapping_url_old.min.js'),
         file_get_contents($path . 'source_mapping_url_old.min.js.optimized.js'),
       ),
       // File. Tests:
       // - Stripped sourceURL with comment # syntax.
       2 => array(
-        array(
-          'type' => 'file',
-          'media' => 'all',
-          'data' => $path . 'source_url.min.js',
-          'basename' => 'source_url.min.js',
-        ),
+        file_get_contents($path . 'source_url.min.js'),
         file_get_contents($path . 'source_url.min.js.optimized.js'),
       ),
       // File. Tests:
       // - Stripped sourceURL with comment @ syntax.
       3 => array(
-        array(
-          'type' => 'file',
-          'media' => 'all',
-          'data' => $path . 'source_url_old.min.js',
-          'basename' => 'source_url_old.min.js',
-        ),
+        file_get_contents($path . 'source_url_old.min.js'),
         file_get_contents($path . 'source_url_old.min.js.optimized.js'),
       ),
     );
@@ -93,4 +73,3 @@ function testClean($js_asset, $expected) {
   }
 
 }
-}