diff -r dde8422fb5ae -r bf0a77f029c4 vm/src/test/java/org/apidesign/vm4brwsr/Classes.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/Classes.java	Sat Dec 01 15:48:12 2012 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/Classes.java	Sun Dec 02 12:26:14 2012 +0100
@@ -24,6 +24,7 @@
  *
  * @author Jaroslav Tulach <jtulach@netbeans.org>
  */
+@ClassesMarker(number = 10)
 public class Classes {
     public static boolean equalsClassesOfExceptions() {
         return MalformedURLException.class.getSuperclass() == IOException.class;
@@ -54,4 +55,11 @@
         }
         throw new IllegalStateException("Not a subtype: " + ioe);
     }
+    public static int getMarker() {
+        if (!Classes.class.isAnnotationPresent(ClassesMarker.class)) {
+            return -2;
+        }
+        ClassesMarker cm = Classes.class.getAnnotation(ClassesMarker.class);
+        return cm == null ? -1 : cm.number();
+    }
 }