diff --git a/test/lib/test.class.php b/test/lib/test.class.php
index bc2e9e0532..213efa1bcf 100644
--- a/test/lib/test.class.php
+++ b/test/lib/test.class.php
@@ -61,7 +61,7 @@ class baseTest
      * @var object
      * @access private
      */
-    protected $instance = null;
+    public $instance = null;
 
     /**
      * 被测试的类的反射对象。