diff --git a/src/Symfony/Component/VarDumper/Tests/VarClonerTest.php b/src/Symfony/Component/VarDumper/Tests/VarClonerTest.php
index 1184f2c76a..9f60032e0c 100644
--- a/src/Symfony/Component/VarDumper/Tests/VarClonerTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/VarClonerTest.php
@@ -137,6 +137,10 @@ EOTXT;
 
     public function testJsonCast()
     {
+        if (ini_get('xdebug.overload_var_dump') == 2) {
+            $this->markTestSkipped('xdebug is active');
+        }
+
         $data = (array) json_decode('{"1":{}}');
 
         $cloner = new VarCloner();