diff --git a/patterns/visualobserver/BoxObserver.java b/patterns/visualobserver/BoxObserver.java
index a7037053..8f3a8a04 100644
--- a/patterns/visualobserver/BoxObserver.java
+++ b/patterns/visualobserver/BoxObserver.java
@@ -4,7 +4,7 @@
 // Visit http://OnJava8.com for more book information.
 // Demonstration of Observer pattern using
 // Java's built-in observer classes
-// {ValidateByHand}
+// {ValidateByHand} --- TEST TEST TEST
 package patterns.visualobserver;
 import javax.swing.*;
 import java.awt.*;
diff --git a/validating/BadMicroBenchmark.java b/validating/BadMicroBenchmark.java
index e1055541..357ab540 100644
--- a/validating/BadMicroBenchmark.java
+++ b/validating/BadMicroBenchmark.java
@@ -2,6 +2,7 @@
 // (c)2017 MindView LLC: see Copyright.txt
 // We make no guarantees that this code is fit for any purpose.
 // Visit http://OnJava8.com for more book information.
+// {ValidateByHand} --- TEST TEST TEST
 import java.util.*;
 import onjava.Timer;