diff --git a/src/Symfony/Component/PropertyInfo/Tests/Fixtures/NullExtractor.php b/src/Symfony/Component/PropertyInfo/Tests/Fixtures/NullExtractor.php
new file mode 100644
index 0000000000..fa1e3da040
--- /dev/null
+++ b/src/Symfony/Component/PropertyInfo/Tests/Fixtures/NullExtractor.php
@@ -0,0 +1,68 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\PropertyInfo\Tests\Fixtures;
+
+use Symfony\Component\PropertyInfo\PropertyAccessExtractorInterface;
+use Symfony\Component\PropertyInfo\PropertyDescriptionExtractorInterface;
+use Symfony\Component\PropertyInfo\PropertyListExtractorInterface;
+use Symfony\Component\PropertyInfo\PropertyTypeExtractorInterface;
+use Symfony\Component\PropertyInfo\Type;
+
+/**
+ * Not able to guess anything.
+ *
+ * @author Kévin Dunglas <dunglas@gmail.com>
+ */
+class NullExtractor implements PropertyListExtractorInterface, PropertyDescriptionExtractorInterface, PropertyTypeExtractorInterface, PropertyAccessExtractorInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function getShortDescription($class, $property, array $context = array())
+    {
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getLongDescription($class, $property, array $context = array())
+    {
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getTypes($class, $property, array $context = array())
+    {
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isReadable($class, $property, array $context = array())
+    {
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function isWritable($class, $property, array $context = array())
+    {
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getProperties($class, array $context = array())
+    {
+    }
+}
diff --git a/src/Symfony/Component/PropertyInfo/Tests/PropertyInfoExtractorTest.php b/src/Symfony/Component/PropertyInfo/Tests/PropertyInfoExtractorTest.php
index 84e4af5c89..a50cf942e5 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/PropertyInfoExtractorTest.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/PropertyInfoExtractorTest.php
@@ -13,6 +13,7 @@ namespace Symfony\Component\PropertyInfo\PropertyInfo\Tests;
 
 use Symfony\Component\PropertyInfo\PropertyInfoExtractor;
 use Symfony\Component\PropertyInfo\Tests\Fixtures\DummyExtractor;
+use Symfony\Component\PropertyInfo\Tests\Fixtures\NullExtractor;
 use Symfony\Component\PropertyInfo\Type;
 
 /**
@@ -27,7 +28,7 @@ class PropertyInfoExtractorTest extends \PHPUnit_Framework_TestCase
 
     public function setUp()
     {
-        $extractors = array(new DummyExtractor());
+        $extractors = array(new NullExtractor(), new DummyExtractor());
         $this->propertyInfo = new PropertyInfoExtractor($extractors, $extractors, $extractors, $extractors);
     }