--- a/test/jdk/java/util/concurrent/tck/SubmissionPublisherTest.java	Tue Jan 16 18:24:32 2018 -0800
+++ b/test/jdk/java/util/concurrent/tck/SubmissionPublisherTest.java	Tue Jan 16 18:28:39 2018 -0800
@@ -431,7 +431,7 @@
      */
     public void testCancel() {
         SubmissionPublisher<Integer> p =
-            new SubmissionPublisher<Integer>(basicExecutor, 4); // must be < 20
+            new SubmissionPublisher<>(basicExecutor, 4); // must be < 20
         TestSubscriber s1 = new TestSubscriber();
         TestSubscriber s2 = new TestSubscriber();
         p.subscribe(s1);
@@ -1012,6 +1012,7 @@
      * cvs update -D '2017-11-25' src/main/java/util/concurrent/SubmissionPublisher.java && ant -Djsr166.expensiveTests=true -Djsr166.tckTestClass=SubmissionPublisherTest -Djsr166.methodFilter=testMissedSignal tck; cvs update -A src/main/java/util/concurrent/SubmissionPublisher.java
      */
     public void testMissedSignal_8187947() throws Exception {
+        if (!atLeastJava9()) return; // backport to jdk8 too hard
         final int N = expensiveTests ? (1 << 20) : (1 << 10);
         final CountDownLatch finished = new CountDownLatch(1);
         final SubmissionPublisher<Boolean> pub = new SubmissionPublisher<>();