diff -r d382dacfd73f -r bb7506513353 rt/vm/src/test/java/org/apidesign/vm4brwsr/StringTest.java
--- a/rt/vm/src/test/java/org/apidesign/vm4brwsr/StringTest.java	Tue Feb 26 16:54:16 2013 +0100
+++ b/rt/vm/src/test/java/org/apidesign/vm4brwsr/StringTest.java	Thu Feb 28 07:48:54 2013 +0100
@@ -19,6 +19,7 @@
 
 import org.testng.annotations.Test;
 import static org.testng.Assert.*;
+import org.testng.annotations.AfterClass;
 import org.testng.annotations.BeforeClass;
 
 /**
@@ -196,12 +197,16 @@
     private static TestVM code;
     
     @BeforeClass 
-    public void compileTheCode() throws Exception {
+    public static void compileTheCode() throws Exception {
         code = TestVM.compileClass(
             "org/apidesign/vm4brwsr/StringSample",
             "java/lang/String"
         );
     }
+    @AfterClass
+    public static void releaseTheCode() {
+        code = null;
+    }
     
     private static void assertExec(String msg, 
         Class<?> clazz, String method, Object expRes, Object... args