diff --git a/src/Constraint/Page.php b/src/Constraint/Page.php
index 13038da..123030f 100644
--- a/src/Constraint/Page.php
+++ b/src/Constraint/Page.php
@@ -6,7 +6,7 @@
 class Page extends \PHPUnit\Framework\Constraint\Constraint
 {
     protected $uri;
-    private $string;
+    protected $string;
 
     public function __construct($string, $uri = '')
     {