diff --git a/jdk/test/tools/launcher/DefaultLocaleTestRun.java b/jdk/test/tools/launcher/DefaultLocaleTestRun.java
index d3c08421e4f..a33bf3478c7 100644
--- a/jdk/test/tools/launcher/DefaultLocaleTestRun.java
+++ b/jdk/test/tools/launcher/DefaultLocaleTestRun.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2012, 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
@@ -34,7 +34,6 @@
  * @compile -XDignore.symbol.file DefaultLocaleTest.java TestHelper.java
  * @run main DefaultLocaleTestRun
  */
-import java.io.File;
 
 public class DefaultLocaleTestRun {
     public static void main(String... args) {
@@ -43,11 +42,13 @@ public class DefaultLocaleTestRun {
             return;
         }
         TestHelper.TestResult tr = null;
-        tr = TestHelper.doExec(TestHelper.javaCmd,  "DefaultLocaleTest", "-w",
-                "x.out");
+        tr = TestHelper.doExec(TestHelper.javaCmd,
+                "-cp", TestHelper.TEST_CLASSES_DIR.getAbsolutePath(),
+                "DefaultLocaleTest", "-w", "x.out");
         System.out.println(tr.testOutput);
-        tr = TestHelper.doExec(TestHelper.javawCmd, "DefaultLocaleTest", "-r",
-                "x.out");
+        tr = TestHelper.doExec(TestHelper.javawCmd,
+                "-cp", TestHelper.TEST_CLASSES_DIR.getAbsolutePath(),
+                "DefaultLocaleTest", "-r", "x.out");
         System.out.println(tr.testOutput);
         if (!tr.isOK()) {
             throw new RuntimeException("Test failed");
diff --git a/jdk/test/tools/launcher/TestHelper.java b/jdk/test/tools/launcher/TestHelper.java
index c0f1119554c..de8f3f7f682 100644
--- a/jdk/test/tools/launcher/TestHelper.java
+++ b/jdk/test/tools/launcher/TestHelper.java
@@ -47,6 +47,10 @@ import static java.nio.file.StandardCopyOption.*;
  */
 public enum TestHelper {
     INSTANCE;
+    // commonly used jtreg constants
+    static final File TEST_CLASSES_DIR;
+    static final File TEST_SOURCES_DIR;
+
     static final String JAVAHOME = System.getProperty("java.home");
     static final boolean isSDK = JAVAHOME.endsWith("jre");
     static final String javaCmd;
@@ -76,6 +80,18 @@ public enum TestHelper {
     static int testExitValue = 0;
 
     static {
+        String tmp = System.getProperty("test.classes", null);
+        if (tmp == null) {
+            throw new Error("property test.classes not defined ??");
+        }
+        TEST_CLASSES_DIR = new File(tmp).getAbsoluteFile();
+
+        tmp = System.getProperty("test.src", null);
+        if (tmp == null) {
+            throw new Error("property test.src not defined ??");
+        }
+        TEST_SOURCES_DIR = new File(tmp).getAbsoluteFile();
+
         if (is64Bit && is32Bit) {
             throw new RuntimeException("arch model cannot be both 32 and 64 bit");
         }