diff --git a/jetty-util/src/test/java/org/eclipse/jetty/util/thread/ReservedThreadExecutorTest.java b/jetty-util/src/test/java/org/eclipse/jetty/util/thread/ReservedThreadExecutorTest.java
index f53267ea6fd..cd9ef0a8a4b 100644
--- a/jetty-util/src/test/java/org/eclipse/jetty/util/thread/ReservedThreadExecutorTest.java
+++ b/jetty-util/src/test/java/org/eclipse/jetty/util/thread/ReservedThreadExecutorTest.java
@@ -174,9 +174,7 @@ public class ReservedThreadExecutorTest
         int available = _reservedExecutor.getAvailable();
          
         assertThat(available,Matchers.greaterThan(0));
-        TimeUnit.MILLISECONDS.sleep(IDLE/2);
-        TimeUnit.MILLISECONDS.sleep(IDLE/2);
-        TimeUnit.MILLISECONDS.sleep(IDLE/2);
+        TimeUnit.MILLISECONDS.sleep(2*IDLE);
         assertThat(_reservedExecutor.getAvailable(),Matchers.lessThan(available));
     }