diff --git a/core/lib/Drupal/Core/Config/ConfigFactory.php b/core/lib/Drupal/Core/Config/ConfigFactory.php
index 1a5acab..1fbca62 100644
--- a/core/lib/Drupal/Core/Config/ConfigFactory.php
+++ b/core/lib/Drupal/Core/Config/ConfigFactory.php
@@ -13,19 +13,30 @@ namespace Drupal\Core\Config;
  * The configuration object factory instantiates a Config object for each
  * configuration object name that is accessed and returns it to callers.
  *
+ * @see Drupal\Core\Config\Config
+ *
  * Each configuration object gets a storage dispatcher object injected, which
  * determines the storage controller to use for reading and writing the
  * configuration data.
  *
- * @see Drupal\Core\Config\Config
+ * @see Drupal\Core\Config\StorageDispatcher
  */
 class ConfigFactory {
-  protected $configClass;
-
+  /**
+   * A storage dispatcher instance to use for reading and writing configuration data.
+   *
+   * @var Drupal\Core\Config\StorageDispatcher
+   */
   protected $storageDispatcher;
 
-  public function __construct($config_class, StorageDispatcher $storage_dispatcher) {
-    $this->configClass = $config_class;
+  /**
+   * Constructs the Config factory.
+   *
+   * @param Drupal\Core\Config\StorageDispatcher $storage_dispatcher
+   *   The storage dispatcher object to use for reading and writing
+   *   configuration data.
+   */
+  public function __construct(StorageDispatcher $storage_dispatcher) {
     $this->storageDispatcher = $storage_dispatcher;
   }
 
@@ -57,7 +68,7 @@ class ConfigFactory {
     // @todo The decrease of CPU time is interesting, since that means that
     //   ContainerBuilder involves plenty of function calls (which are known to
     //   be slow in PHP).
-    $config = new $this->configClass($this->storageDispatcher);
+    $config = new Config($this->storageDispatcher);
     return $config->setName($name);
   }
 }
diff --git a/core/lib/Drupal/Core/DependencyInjection/ContainerBuilder.php b/core/lib/Drupal/Core/DependencyInjection/ContainerBuilder.php
index b811199..3dc0df5 100644
--- a/core/lib/Drupal/Core/DependencyInjection/ContainerBuilder.php
+++ b/core/lib/Drupal/Core/DependencyInjection/ContainerBuilder.php
@@ -49,7 +49,6 @@ class ContainerBuilder extends BaseContainerBuilder {
 
     // Register configuration object factory.
     $this->register('config.factory', 'Drupal\Core\Config\ConfigFactory')
-      ->addArgument('Drupal\Core\Config\Config')
       ->addArgument(new Reference('config.storage.dispatcher'));
   }
 }