--- old/test/jdk/java/util/concurrent/tck/DoubleAccumulatorTest.java	2019-09-14 11:12:41.668945633 -0700
+++ new/test/jdk/java/util/concurrent/tck/DoubleAccumulatorTest.java	2019-09-14 11:12:41.316945386 -0700
@@ -156,7 +156,7 @@
             = new DoubleAccumulator((x, y) -> x + y, 0.0);
         final int nThreads = ThreadLocalRandom.current().nextInt(1, 5);
         final Phaser phaser = new Phaser(nThreads + 1);
-        final int incs = 1_000_000;
+        final int incs = expensiveTests ? 1_000_000 : 100_000;
         final double total = nThreads * incs/2.0 * (incs - 1); // Gauss
         final Runnable task = () -> {
             phaser.arriveAndAwaitAdvance();