diff --git a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_frozen.php b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_frozen.php
index f66693a105..6626db5567 100644
--- a/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_frozen.php
+++ b/src/Symfony/Component/DependencyInjection/Tests/Fixtures/php/services_private_frozen.php
@@ -28,6 +28,11 @@ class ProjectServiceContainer extends Container
     public function __construct()
     {
         $this->services = array();
+        $this->normalizedIds = array(
+            'psr\\container\\containerinterface' => 'Psr\\Container\\ContainerInterface',
+            'symfony\\component\\dependencyinjection\\container' => 'Symfony\\Component\\DependencyInjection\\Container',
+            'symfony\\component\\dependencyinjection\\containerinterface' => 'Symfony\\Component\\DependencyInjection\\ContainerInterface',
+        );
         $this->methodMap = array(
             'bar_service' => 'getBarServiceService',
             'baz_service' => 'getBazServiceService',