1 files changed, 1 insertions, 1 deletions
diff --git a/dom/events/test/test_use_split_keypress_event_model_on_old_Office_Online_Server.html b/dom/events/test/test_use_split_keypress_event_model_on_old_Office_Online_Server.html
index 68f52be41d..02047fef90 100644
--- a/dom/events/test/test_use_split_keypress_event_model_on_old_Office_Online_Server.html
+++ b/dom/events/test/test_use_split_keypress_event_model_on_old_Office_Online_Server.html
@@ -23,7 +23,7 @@ function srcdocLoaded() {
    waitForCheckKeyPressEventModelEvent = new Promise(resolve => {
       dump(document.querySelector("iframe").contentDocument.location + "\n");
       var doc = document.querySelector("iframe").contentDocument;
-      SpecialPowers.addSystemEventListener(doc, "CheckKeyPressEventModel", resolve, {once: true});
+      SpecialPowers.wrap(doc).addEventListener("CheckKeyPressEventModel", resolve, {mozSystemGroup: true, once: true});
       doc.getElementById("WACViewPanel_EditingElement").contentEditable = "true";
    });
 }