diff --git a/tst/Data/GoogleCloudStorageTest.php b/tst/Data/GoogleCloudStorageTest.php
index dde19dd4..f5736f78 100644
--- a/tst/Data/GoogleCloudStorageTest.php
+++ b/tst/Data/GoogleCloudStorageTest.php
@@ -9,6 +9,7 @@ class GoogleCloudStorageTest extends TestCase
 {
     private static $_client;
     private static $_bucket;
+    private $_model;
 
     public static function setUpBeforeClass(): void
     {