diff --git a/src/Symfony/Bridge/Twig/Extension/TranslationExtension.php b/src/Symfony/Bridge/Twig/Extension/TranslationExtension.php
index 3718e9e2c4..2ab3832d89 100644
--- a/src/Symfony/Bridge/Twig/Extension/TranslationExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/TranslationExtension.php
@@ -28,10 +28,14 @@ class TranslationExtension extends \Twig_Extension
     private $translator;
     private $translationNodeVisitor;
 
-    public function __construct(TranslatorInterface $translator)
+    public function __construct(TranslatorInterface $translator, \Twig_NodeVisitorInterface $translationNodeVisitor = null)
     {
+        if (!$translationNodeVisitor) {
+            $translationNodeVisitor = new TranslationNodeVisitor();
+        }
+
         $this->translator = $translator;
-        $this->translationNodeVisitor = new TranslationNodeVisitor();
+        $this->translationNodeVisitor = $translationNodeVisitor;
     }
 
     public function getTranslator()