diff --git a/src/Symfony/Bridge/Twig/Extension/DumpExtension.php b/src/Symfony/Bridge/Twig/Extension/DumpExtension.php
index 767163f87da1c..2cc3f1a4b0440 100644
--- a/src/Symfony/Bridge/Twig/Extension/DumpExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/DumpExtension.php
@@ -32,7 +32,7 @@ class DumpExtension extends AbstractExtension
     public function __construct(ClonerInterface $cloner, HtmlDumper $dumper = null)
     {
         $this->cloner = $cloner;
-        $this->dumper = $dumper ?: new HtmlDumper();
+        $this->dumper = $dumper;
     }
 
     public function getFunctions()
@@ -73,6 +73,7 @@ public function dump(Environment $env, $context)
         }
 
         $dump = fopen('php://memory', 'r+b');
+        $this->dumper = $this->dumper ?: new HtmlDumper();
         $this->dumper->setCharset($env->getCharset());
 
         foreach ($vars as $value) {
diff --git a/src/Symfony/Bridge/Twig/Extension/TranslationExtension.php b/src/Symfony/Bridge/Twig/Extension/TranslationExtension.php
index 01d0f6c6442e3..f1131c52df614 100644
--- a/src/Symfony/Bridge/Twig/Extension/TranslationExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/TranslationExtension.php
@@ -34,10 +34,6 @@ class TranslationExtension extends AbstractExtension
 
     public function __construct(TranslatorInterface $translator = null, NodeVisitorInterface $translationNodeVisitor = null)
     {
-        if (!$translationNodeVisitor) {
-            $translationNodeVisitor = new TranslationNodeVisitor();
-        }
-
         $this->translator = $translator;
         $this->translationNodeVisitor = $translationNodeVisitor;
     }
@@ -84,12 +80,12 @@ public function getTokenParsers()
      */
     public function getNodeVisitors()
     {
-        return array($this->translationNodeVisitor, new TranslationDefaultDomainNodeVisitor());
+        return array($this->getTranslationNodeVisitor(), new TranslationDefaultDomainNodeVisitor());
     }
 
     public function getTranslationNodeVisitor()
     {
-        return $this->translationNodeVisitor;
+        return $this->translationNodeVisitor ?: $this->translationNodeVisitor = new TranslationNodeVisitor();
     }
 
     public function trans($message, array $arguments = array(), $domain = null, $locale = null)