--- a/test/hotspot/jtreg/runtime/testlibrary/ClassUnloadCommon.java	Fri Sep 14 09:00:22 2018 -0700
+++ b/test/hotspot/jtreg/runtime/testlibrary/ClassUnloadCommon.java	Fri Sep 14 12:10:28 2018 -0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -73,7 +73,7 @@
                 .map(Paths::get)
                 .map(ClassUnloadCommon::toURL)
                 .toArray(URL[]::new);
-        return new URLClassLoader(urls) {
+        return new URLClassLoader("ClassUnloadCommonClassLoader", urls, new ClassUnloadCommon().getClass().getClassLoader()) {
             @Override
             public Class<?> loadClass(String cn, boolean resolve)
                 throws ClassNotFoundException