diff --git a/Examples/test-suite/director_frob.i b/Examples/test-suite/director_frob.i
index 02768cf5c..5b6994257 100644
--- a/Examples/test-suite/director_frob.i
+++ b/Examples/test-suite/director_frob.i
@@ -47,4 +47,10 @@
     virtual ~Ops() {}
     virtual operator int() { return 0; }
   };
+
+  struct Prims {
+    virtual ~Prims() {}
+    virtual unsigned long long ull(unsigned long long i, unsigned long long j) { return i + j; }
+    unsigned long long callull(int i, int j) { return ull(i, j); }
+  };
 %}
diff --git a/Examples/test-suite/java/director_frob_runme.java b/Examples/test-suite/java/director_frob_runme.java
index 4f1ec2a60..ac1c4eb95 100644
--- a/Examples/test-suite/java/director_frob_runme.java
+++ b/Examples/test-suite/java/director_frob_runme.java
@@ -19,6 +19,21 @@ public class director_frob_runme
 
     String s = foo.abs_method();
     if (!s.equals("Bravo::abs_method()"))
-        throw new RuntimeException( "error" );
+      throw new RuntimeException( "error" );
+
+    Prims prims = new PrimsDerived();
+    java.math.BigInteger bi = prims.callull(200, 50);
+    java.math.BigInteger biCheck = new java.math.BigInteger("150");
+    if (bi.compareTo(biCheck) != 0)
+      throw new RuntimeException( "failed got:" + bi);
   }
-}
\ No newline at end of file
+}
+
+class PrimsDerived extends Prims {
+  PrimsDerived() {
+    super();
+  }
+  public java.math.BigInteger ull(java.math.BigInteger i, java.math.BigInteger j) {
+    return i.subtract(j);
+  }
+}