diff --git a/tests/Unit/WhiteBox/Handler/JsonToStdErrHandlerTest.php b/tests/Unit/WhiteBox/Handler/JsonToStdErrHandlerTest.php
index fd46cbe..cf1a736 100644
--- a/tests/Unit/WhiteBox/Handler/JsonToStdErrHandlerTest.php
+++ b/tests/Unit/WhiteBox/Handler/JsonToStdErrHandlerTest.php
@@ -201,6 +201,7 @@ public function providerDump(): Generator
         $object = new stdClass();
         $object->foo = new stdClass();
         $object->foo->baz = new stdClass();
+        $object->bar = new stdClass();
         $object->bar->baz = new stdClass();
         yield [ // 8
             'value' => $object,