--- a/test/jdk/java/util/concurrent/Phaser/FickleRegister.java	Sat Sep 14 11:26:26 2019 -0700
+++ b/test/jdk/java/util/concurrent/Phaser/FickleRegister.java	Sat Sep 14 11:26:26 2019 -0700
@@ -43,7 +43,7 @@
 
 public class FickleRegister {
     final AtomicLong count = new AtomicLong(0);
-    final long testDurationMillisDefault = 10L * 1000L;
+    final long testDurationMillisDefault = 10_000L;
     final long testDurationMillis;
     final long quittingTimeNanos;
     final int chunkSize = 1000;