--- jsr166/src/test/tck/LongAccumulatorTest.java	2017/04/23 04:08:48	1.9
+++ jsr166/src/test/tck/LongAccumulatorTest.java	2019/09/09 01:05:22	1.10
@@ -123,7 +123,7 @@ public class LongAccumulatorTest extends
             = new LongAccumulator((x, y) -> x + y, 0L);
         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 long total = nThreads * incs/2L * (incs - 1); // Gauss
         final Runnable task = () -> {
             phaser.arriveAndAwaitAdvance();