diff --git a/testing/web-platform/meta/cookies/http-state/mozilla-tests.html.ini b/testing/web-platform/meta/cookies/http-state/mozilla-tests.html.ini
new file mode 100644
index 000000000000..7bc48d3631de
--- /dev/null
+++ b/testing/web-platform/meta/cookies/http-state/mozilla-tests.html.ini
@@ -0,0 +1,2 @@
+[mozilla-tests.html]
+  disabled: Bug 1551729