diff --git a/lib/Cake/Core/Configure.php b/lib/Cake/Core/Configure.php
index cba018c75..901606cd2 100644
--- a/lib/Cake/Core/Configure.php
+++ b/lib/Cake/Core/Configure.php
@@ -114,6 +114,9 @@ class Configure {
 				class_exists('Debugger');
 				class_exists('CakeText');
 			}
+			if (!defined('TESTS')) {
+				define('TESTS', APP . 'Test' . DS);
+			}
 		}
 	}