diff -r 99f832e5765f -r 65f6fdfd34b6 src/test/java/org/apidesign/java4browser/InstanceSub.java
--- a/src/test/java/org/apidesign/java4browser/InstanceSub.java	Wed Sep 19 19:57:45 2012 +0200
+++ b/src/test/java/org/apidesign/java4browser/InstanceSub.java	Thu Sep 20 09:29:42 2012 +0200
@@ -8,7 +8,7 @@
  *
  * @author Jaroslav Tulach <jtulach@netbeans.org>
  */
-public class InstanceSub extends Instance {
+public class InstanceSub extends Instance implements GetByte {
     public InstanceSub(int i, double d) {
         super(i, d);
     }