diff --git a/src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php b/src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php
index 1ec6548be2738..5df1cc87df7af 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php
@@ -77,7 +77,7 @@ protected static function bootKernel(array $options = [])
 
         $kernel = static::createKernel($options);
         $kernel->boot();
-        self::$kernel = $kernel;
+        static::$kernel = $kernel;
         static::$booted = true;
 
         $container = static::$kernel->getContainer();