diff --git a/testing/web-platform/meta/webtransport/idlharness.https.any.js.ini b/testing/web-platform/meta/webtransport/idlharness.https.any.js.ini
index 1e19b046f89f7..c749316999451 100644
--- a/testing/web-platform/meta/webtransport/idlharness.https.any.js.ini
+++ b/testing/web-platform/meta/webtransport/idlharness.https.any.js.ini
@@ -74,6 +74,12 @@
   [WebTransportWriter interface: operation atomicWrite(optional any)]
     expected: FAIL
 
+  [WebTransport interface: attribute protocol]
+    expected: FAIL
+
+  [WebTransport interface: webTransport must inherit property "protocol" with the proper type]
+    expected: FAIL
+
 
 [idlharness.https.any.serviceworker.html]
   [WebTransport interface: attribute draining]
@@ -151,6 +157,12 @@
   [WebTransportWriter interface: operation atomicWrite(optional any)]
     expected: FAIL
 
+  [WebTransport interface: attribute protocol]
+    expected: FAIL
+
+  [WebTransport interface: webTransport must inherit property "protocol" with the proper type]
+    expected: FAIL
+
 
 [idlharness.https.any.sharedworker.html]
   [WebTransport interface: attribute draining]
@@ -228,6 +240,12 @@
   [WebTransportWriter interface: operation atomicWrite(optional any)]
     expected: FAIL
 
+  [WebTransport interface: attribute protocol]
+    expected: FAIL
+
+  [WebTransport interface: webTransport must inherit property "protocol" with the proper type]
+    expected: FAIL
+
 
 [idlharness.https.any.worker.html]
   [WebTransport interface: attribute draining]
@@ -304,3 +322,9 @@
 
   [WebTransportWriter interface: operation atomicWrite(optional any)]
     expected: FAIL
+
+  [WebTransport interface: attribute protocol]
+    expected: FAIL
+
+  [WebTransport interface: webTransport must inherit property "protocol" with the proper type]
+    expected: FAIL