diff --git a/tests/HTMLPurifier/DefinitionTestable.php b/tests/HTMLPurifier/DefinitionTestable.php
index 312c57bb..77020c61 100644
--- a/tests/HTMLPurifier/DefinitionTestable.php
+++ b/tests/HTMLPurifier/DefinitionTestable.php
@@ -1,7 +1,14 @@
 <?php
 
+abstract class HTMLPurifier_TestDefinition extends HTMLPurifier_Definition
+{
+    public $info;
+    public $info_candles;
+    public $info_random;
+}
+
 Mock::generatePartial(
-        'HTMLPurifier_Definition',
+        'HTMLPurifier_TestDefinition',
         'HTMLPurifier_DefinitionTestable',
         array('doSetup'));