diff -r 82b8d12a553f -r e5b3e9732c3c hotspot/test/runtime/modules/Xpatch/XpatchTestJar.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/runtime/modules/Xpatch/XpatchTestJar.java	Tue May 03 09:09:20 2016 +0100
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2016, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @summary Make sure -Xpatch works when a jar file is specified for a module
+ * @library /testlibrary
+ * @modules java.base/jdk.internal.misc
+ *          jdk.jartool/sun.tools.jar
+ * @build BasicJarBuilder
+ * @compile XpatchMain.java
+ * @run main XpatchTestJar
+ */
+
+import jdk.test.lib.*;
+
+public class XpatchTestJar {
+    private static String moduleJar;
+
+    public static void main(String[] args) throws Exception {
+
+        // Create a class file in the module java.naming. This class file
+        // will be put in the javanaming.jar file.
+        String source = "package javax.naming.spi; "                +
+                        "public class NamingManager { "             +
+                        "    static { "                             +
+                        "        System.out.println(\"I pass!\"); " +
+                        "    } "                                    +
+                        "}";
+
+        ClassFileInstaller.writeClassToDisk("javax/naming/spi/NamingManager",
+             InMemoryJavaCompiler.compile("javax.naming.spi.NamingManager", source, "-Xmodule:java.naming"),
+             System.getProperty("test.classes"));
+
+        // Build the jar file that will be used for the module "java.naming".
+        BasicJarBuilder.build("javanaming", "javax/naming/spi/NamingManager");
+        moduleJar = BasicJarBuilder.getTestJar("javanaming.jar");
+
+        // Just to make sure we are not fooled by the class file being on the
+        // class path where all the test classes are stored, write the NamingManager.class
+        // file out again with output that does not contain what OutputAnalyzer
+        // expects. This will provide confidence that the contents of the class
+        // is truly coming from the jar file and not the class file.
+        source =        "package javax.naming.spi; "                +
+                        "public class NamingManager { "             +
+                        "    static { "                             +
+                        "        System.out.println(\"Fail!\"); "   +
+                        "    } "                                    +
+                        "}";
+
+        ClassFileInstaller.writeClassToDisk("javax/naming/spi/NamingManager",
+             InMemoryJavaCompiler.compile("javax.naming.spi.NamingManager", source, "-Xmodule:java.naming"),
+             System.getProperty("test.classes"));
+
+        // Supply -Xpatch with the name of the jar file for the module java.naming.
+        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xpatch:java.naming=" + moduleJar,
+             "XpatchMain", "javax.naming.spi.NamingManager");
+
+        new OutputAnalyzer(pb.start())
+            .shouldContain("I pass!")
+            .shouldHaveExitValue(0);
+    }
+}