diff --git a/tests/wpt/mozilla/meta-layout-2020/mozilla/sequence-hole.html.ini b/tests/wpt/mozilla/meta-layout-2020/mozilla/sequence-hole.html.ini
index 9c4525b4bd5..7cb31d5ca5f 100644
--- a/tests/wpt/mozilla/meta-layout-2020/mozilla/sequence-hole.html.ini
+++ b/tests/wpt/mozilla/meta-layout-2020/mozilla/sequence-hole.html.ini
@@ -1,4 +1,5 @@
 [sequence-hole.html]
+  prefs: [dom.testbinding.enabled:true]
   [Sequences with holes and a getter on the prototype are correctly handled]
     expected: FAIL