diff --git a/testing/web-platform/meta/dom/idlharness.window.js.ini b/testing/web-platform/meta/dom/idlharness.window.js.ini
index f7ee708e74ab..5ae86393e8fa 100644
--- a/testing/web-platform/meta/dom/idlharness.window.js.ini
+++ b/testing/web-platform/meta/dom/idlharness.window.js.ini
@@ -6,9 +6,3 @@
 
   [Stringification of document.createNSResolver(document.body)]
     expected: FAIL
-
-  [AbortSignal interface: attribute reason]
-    expected: FAIL
-
-  [AbortSignal interface: new AbortController().signal must inherit property "reason" with the proper type]
-    expected: FAIL