diff --git a/test/AbstractLazyPimpleTest.php b/test/AbstractLazyPimpleTest.php
index 99b9066..1c970a7 100644
--- a/test/AbstractLazyPimpleTest.php
+++ b/test/AbstractLazyPimpleTest.php
@@ -24,7 +24,7 @@ public function setUp()
     {
         $this->originalAutoloader = current(spl_autoload_functions());
 
-        $this->assertIsCallable($this->originalAutoloader);
+        $this->assertInternalType('callable', $this->originalAutoloader);
 
         $this->container = require 'container_definition.php';