diff --git a/testing/web-platform/meta/preload/link-header-preload-delay-onload.html.ini b/testing/web-platform/meta/preload/link-header-preload-delay-onload.html.ini
index 0d33c38b5737..57b27c73cf74 100644
--- a/testing/web-platform/meta/preload/link-header-preload-delay-onload.html.ini
+++ b/testing/web-platform/meta/preload/link-header-preload-delay-onload.html.ini
@@ -1,3 +1,4 @@
 [link-header-preload-delay-onload.html]
   disabled:
     if os == "linux": https://bugzilla.mozilla.org/show_bug.cgi?id=1437081
+    if os == "mac": https://bugzilla.mozilla.org/show_bug.cgi?id=1437081