diff -r 59b9f9f5364f -r b8fd5ab83a20 vm/src/test/java/org/apidesign/vm4brwsr/tck/CompareHashTest.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/tck/CompareHashTest.java	Thu Dec 06 16:13:03 2012 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/tck/CompareHashTest.java	Sun Dec 16 21:19:26 2012 +0100
@@ -30,6 +30,11 @@
         return "Ahoj".hashCode();
     }
     
+    @Compare public int hashRemainsYieldsZero() {
+        Object o = new Object();
+        return o.hashCode() - o.hashCode();
+    }
+    
     @Factory
     public static Object[] create() {
         return CompareVMs.create(CompareHashTest.class);