diff --git a/test/spec/lib/d3.combobox.js b/test/spec/lib/d3.combobox.js
index 7b78eb2c8..fe3ad0b13 100644
--- a/test/spec/lib/d3.combobox.js
+++ b/test/spec/lib/d3.combobox.js
@@ -85,7 +85,7 @@ describe('d3.combobox', function() {
     //
     function focusTypeahead(input) {
         input.node().focus();
-        d3.customEvent(new FocusEvent('focus'), input.on('focus.typeahead'));
+        d3.customEvent(happen.makeEvent('focus'), input.on('focus.typeahead'));
     }
 
     it('adds the combobox-input class', function() {