diff --git a/tests/Unit/Crypt/AES/TestCase.php b/tests/Unit/Crypt/AES/TestCase.php
index f082c939..16a4089b 100644
--- a/tests/Unit/Crypt/AES/TestCase.php
+++ b/tests/Unit/Crypt/AES/TestCase.php
@@ -5,7 +5,9 @@
  * @license   http://www.opensource.org/licenses/mit-license.html  MIT License
  */
 
-abstract class Unit_Crypt_AES_TestCase extends PhpSeclibTestcase
+require_once 'Crypt/AES.php';
+
+abstract class Unit_Crypt_AES_TestCase extends PhpseclibTestCase
 {
     static public function setUpBeforeClass()
     {