diff --git a/webtransport/close.https.any.js b/webtransport/close.https.any.js
index d1f66751926016..b6b367badf5c75 100644
--- a/webtransport/close.https.any.js
+++ b/webtransport/close.https.any.js
@@ -13,8 +13,8 @@ promise_test(async t => {
 
   const close_info = await wt.closed;
 
-  assert_not_own_property(close_info, 'closeCode');
-  assert_not_own_property(close_info, 'reason');
+  assert_equals(close_info.closeCode, 0 , 'code');
+  assert_equals(close_info.reason, '', 'reason');
 
   await wait(10);
   const data = await query(id);