diff -r af170d42b5b3 -r e51a474fcf79 javaquery/api/src/test/java/org/apidesign/bck2brwsr/htmlpage/ModelTest.java
--- a/javaquery/api/src/test/java/org/apidesign/bck2brwsr/htmlpage/ModelTest.java	Mon Mar 25 11:50:36 2013 +0100
+++ b/javaquery/api/src/test/java/org/apidesign/bck2brwsr/htmlpage/ModelTest.java	Sun Mar 31 12:01:38 2013 +0200
@@ -197,6 +197,10 @@
     static class MockKnockout extends Knockout {
         List<String> mutated = new ArrayList<>();
         
+        MockKnockout() {
+            super(null);
+        }
+        
         @Override
         public void valueHasMutated(String prop) {
             mutated.add(prop);