diff --git a/testing/web-platform/meta/css/css-font-loading/fontface-override-descriptor-getter-setter.sub.html.ini b/testing/web-platform/meta/css/css-font-loading/fontface-override-descriptor-getter-setter.sub.html.ini
index 767a20bf9673..852b9e6ff9db 100644
--- a/testing/web-platform/meta/css/css-font-loading/fontface-override-descriptor-getter-setter.sub.html.ini
+++ b/testing/web-platform/meta/css/css-font-loading/fontface-override-descriptor-getter-setter.sub.html.ini
@@ -72,6 +72,7 @@
       if (os == "win") and not debug and webrender and not fission: ["TIMEOUT", "FAIL"]
       if (os == "win") and not debug and webrender and fission: ["TIMEOUT", "FAIL"]
       if (os == "win") and debug and webrender: ["NOTRUN", "FAIL"]
+      FAIL
 
   [Initialize ascentOverride with a percentage should succeed]
     expected: FAIL