diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypeTest.php
index 2e99c2c774..b251da031c 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/ChoiceTypeTest.php
@@ -380,7 +380,7 @@ class ChoiceTypeTest extends \Symfony\Component\Form\Test\TypeTestCase
 
         $form->submit('foobar');
 
-        $this->assertSame(null, $form->getData());
+        $this->assertNull($form->getData());
         $this->assertSame('foobar', $form->getViewData());
         $this->assertEmpty($form->getExtraData());
         $this->assertFalse($form->isSynchronized());
@@ -445,7 +445,7 @@ class ChoiceTypeTest extends \Symfony\Component\Form\Test\TypeTestCase
 
         $form->submit('foobar');
 
-        $this->assertSame(null, $form->getData());
+        $this->assertNull($form->getData());
         $this->assertSame('foobar', $form->getViewData());
         $this->assertEmpty($form->getExtraData());
         $this->assertFalse($form->isSynchronized());
diff --git a/src/Symfony/Component/Routing/Tests/Loader/XmlFileLoaderTest.php b/src/Symfony/Component/Routing/Tests/Loader/XmlFileLoaderTest.php
index 9f038c1611..ee1dc5ca90 100644
--- a/src/Symfony/Component/Routing/Tests/Loader/XmlFileLoaderTest.php
+++ b/src/Symfony/Component/Routing/Tests/Loader/XmlFileLoaderTest.php
@@ -68,7 +68,7 @@ class XmlFileLoaderTest extends \PHPUnit_Framework_TestCase
         $this->assertSame('MyBundle:Blog:show', $route->getDefault('_controller'));
         $this->assertSame('\w+', $route->getRequirement('slug'));
         $this->assertSame('en|fr|de', $route->getRequirement('_locale'));
-        $this->assertSame(null, $route->getDefault('slug'));
+        $this->assertNull($route->getDefault('slug'));
         $this->assertSame('RouteCompiler', $route->getOption('compiler_class'));
     }