diff --git a/setup/src/Magento/Setup/Test/Unit/Model/InstallerTest.php b/setup/src/Magento/Setup/Test/Unit/Model/InstallerTest.php
index 098e210824389a8848265a9d2b072d53fa24fd2d..e8b4f8714a44e64aa0b69d6acf3b6b9cd838d3a4 100644
--- a/setup/src/Magento/Setup/Test/Unit/Model/InstallerTest.php
+++ b/setup/src/Magento/Setup/Test/Unit/Model/InstallerTest.php
@@ -489,3 +489,15 @@ class InstallerTest extends \PHPUnit_Framework_TestCase
         return $newObject;
     }
 }
+
+namespace Magento\Setup\Model;
+
+/**
+ * Mocking autoload function
+ * 
+ * @returns array
+ */
+function spl_autoload_functions()
+{
+    return ['mock_function_one', 'mock_function_two'];
+}