diff --git a/tests/Message/ListPlansTest.php b/tests/Message/ListPlansTest.php
index 98d4823e..54e4641f 100644
--- a/tests/Message/ListPlansTest.php
+++ b/tests/Message/ListPlansTest.php
@@ -6,6 +6,9 @@
 
 class ListPlansTest extends TestCase
 {
+    /** @var  ListPlansRequest */
+    protected $request;
+
     public function setUp()
     {
         $this->request = new ListPlansRequest($this->getHttpClient(), $this->getHttpRequest());