diff --git a/core/modules/system/lib/Drupal/system/Tests/Image/ToolkitTest.php b/core/modules/system/lib/Drupal/system/Tests/Image/ToolkitTest.php
index 5f6c4dc..e2a546e 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Image/ToolkitTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Image/ToolkitTest.php
@@ -26,7 +26,7 @@ public static function getInfo() {
    * available toolkits.
    */
   function testGetAvailableToolkits() {
-    $manager = new ImageToolkitManager($this->container->get('container.namespaces'), $this->container->get('cache.cache'), $this->container->get('language_manager'));
+    $manager = $this->container->get('image.toolkit.manager');
     $toolkits = $manager->getAvailableToolkits();
     $this->assertTrue(isset($toolkits['test']), 'The working toolkit was returned.');
     $this->assertFalse(isset($toolkits['broken']), 'The toolkit marked unavailable was not returned');
diff --git a/core/modules/system/lib/Drupal/system/Tests/Image/ToolkitTestBase.php b/core/modules/system/lib/Drupal/system/Tests/Image/ToolkitTestBase.php
index a7d097b..38d7a91 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Image/ToolkitTestBase.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Image/ToolkitTestBase.php
@@ -8,7 +8,6 @@
 namespace Drupal\system\Tests\Image;
 
 use Drupal\simpletest\WebTestBase;
-use Drupal\system\Plugin\ImageToolkitManager;
 
 /**
  * Base class for image manipulation testing.
@@ -47,7 +46,7 @@ function setUp() {
     parent::setUp();
 
     // Use the image_test.module's test toolkit.
-    $manager = new ImageToolkitManager($this->container->get('container.namespaces'), $this->container->get('cache.cache'), $this->container->get('language_manager'));
+    $manager = $this->container->get('image.toolkit.manager');
     $this->toolkit = $manager->createInstance('test');
 
     // Pick a file for testing.