diff -r 84a744941c9f -r 4a1398eff4fb rt/vm/src/test/java/org/apidesign/vm4brwsr/TestVM.java
--- a/rt/vm/src/test/java/org/apidesign/vm4brwsr/TestVM.java	Fri Apr 25 09:59:48 2014 +0200
+++ b/rt/vm/src/test/java/org/apidesign/vm4brwsr/TestVM.java	Sat Apr 26 21:30:06 2014 +0200
@@ -133,8 +133,7 @@
         Bck2Brwsr.generate(sb, new EmulationResources());
         Bck2Brwsr b2b = Bck2Brwsr.newCompiler().
             resources(new EmulationResources()).
-            addRootClasses(names).
-            extension(true);
+            addRootClasses(names).library(true);
         b2b.generate(sb);
         ScriptEngineManager sem = new ScriptEngineManager();
         ScriptEngine js = sem.getEngineByExtension("js");