--- jsr166/src/test/tck/JSR166TestCase.java	2016/05/22 01:09:21	1.192
+++ jsr166/src/test/tck/JSR166TestCase.java	2016/05/23 18:42:17	1.194
@@ -12,6 +12,7 @@
  * @modules java.management
  * @build *
  * @run junit/othervm/timeout=1000 -Djsr166.testImplementationDetails=true JSR166TestCase
+ * @run junit/othervm/timeout=1000 -Djava.util.concurrent.ForkJoinPool.common.parallelism=0 -Djsr166.testImplementationDetails=true JSR166TestCase
  */
 
 import static java.util.concurrent.TimeUnit.MILLISECONDS;
@@ -58,6 +59,7 @@ import java.util.concurrent.RecursiveAct
 import java.util.concurrent.RecursiveTask;
 import java.util.concurrent.RejectedExecutionHandler;
 import java.util.concurrent.Semaphore;
+import java.util.concurrent.SynchronousQueue;
 import java.util.concurrent.ThreadFactory;
 import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeoutException;
@@ -1841,4 +1843,11 @@ public class JSR166TestCase extends Test
     public Runnable runnableThrowing(final RuntimeException ex) {
         return new Runnable() { public void run() { throw ex; }};
     }
+
+    /** A reusable thread pool to be shared by tests. */
+    static final ExecutorService cachedThreadPool =
+        new ThreadPoolExecutor(0, Integer.MAX_VALUE,
+                               1000L, MILLISECONDS,
+                               new SynchronousQueue<Runnable>());
+
 }