diff --git a/tests/wpt/metadata/html/dom/reflection-embedded.html.ini b/tests/wpt/metadata/html/dom/reflection-embedded.html.ini
index b642ef919b3..0214ebf2e6d 100644
--- a/tests/wpt/metadata/html/dom/reflection-embedded.html.ini
+++ b/tests/wpt/metadata/html/dom/reflection-embedded.html.ini
@@ -1,5 +1,7 @@
 [reflection-embedded.html]
   type: testharness
+  disabled:
+    if os == "osx": https://github.com/servo/servo/issues/11100
   [img.dir: typeof IDL attribute]
     expected: FAIL