diff --git a/src/Symfony/Component/Form/Tests/Extension/Core/Type/DateTypeTest.php b/src/Symfony/Component/Form/Tests/Extension/Core/Type/DateTypeTest.php
index d907c9c3d15e2..05fc63f055b5a 100644
--- a/src/Symfony/Component/Form/Tests/Extension/Core/Type/DateTypeTest.php
+++ b/src/Symfony/Component/Form/Tests/Extension/Core/Type/DateTypeTest.php
@@ -598,7 +598,7 @@ public function testIsSynchronizedReturnsTrueIfChoiceAndCompletelyFilled()
         ));
 
         $form->submit(array(
-            'day' => '0',
+            'day' => '1',
             'month' => '6',
             'year' => '2010',
         ));