diff -r 2e2e6f946208 -r c12342170235 vm/src/test/java/org/apidesign/vm4brwsr/ClassTest.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/ClassTest.java	Wed Dec 05 10:03:58 2012 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/ClassTest.java	Tue Dec 11 11:05:06 2012 +0100
@@ -110,6 +110,12 @@
             "java.io.IOException", false, null
         );
     }
+    @Test public void jsClassParam() throws Exception {
+        assertExec("Calls the nameOfIO()", Classes.class, 
+            "nameOfIO__Ljava_lang_String_2", 
+            "java.io.IOException"
+        );
+    }
     
     private static CharSequence codeSeq;
     private static Invocable code;