diff --git a/Tests/LazyProxy/PhpDumper/Fixtures/proxy-implem.php b/Tests/LazyProxy/PhpDumper/Fixtures/proxy-implem.php
index 19a9bdd..c12f115 100644
--- a/Tests/LazyProxy/PhpDumper/Fixtures/proxy-implem.php
+++ b/Tests/LazyProxy/PhpDumper/Fixtures/proxy-implem.php
@@ -200,7 +200,7 @@ public function __wakeup()
     {
     }
 
-    public function setProxyInitializer(\Closure $initializer = null)%S
+    public function setProxyInitializer(%S\Closure $initializer = null)%S
     {
         $this->initializer%s = $initializer;
     }