diff --git a/newio/MappedIO.java b/newio/MappedIO.java
index 82f3cca7..93b4ddf3 100644
--- a/newio/MappedIO.java
+++ b/newio/MappedIO.java
@@ -2,6 +2,7 @@
 // (c)2020 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.
+// {ExcludeFromGradle} Runs too long under WSL2
 import java.util.*;
 import java.nio.*;
 import java.nio.channels.*;
diff --git a/patterns/BoxObserver.java b/patterns/BoxObserver.java
index 355c4086..cb7e97d4 100644
--- a/patterns/BoxObserver.java
+++ b/patterns/BoxObserver.java
@@ -3,8 +3,8 @@
 // We make no guarantees that this code is fit for any purpose.
 // Visit http://OnJava8.com for more book information.
 // Demonstration of Observer pattern using
-// Java's built-in observer classes
-// {ExcludeFromTravisCI}
+// Java's built-in observer classes.
+// {ExcludeFromGradle} // Won't work under WSL2
 import javax.swing.*;
 import java.awt.*;
 import java.awt.event.*;
@@ -33,7 +33,8 @@ public class BoxObserver extends JFrame {
         cp.add(new OCBox(x, y, notifier));
   }
   public static void main(String[] args) {
-    new TimedAbort(4);
+    // For automated test runs:
+    // new TimedAbort(4);
     int grid = 8;
     if(args.length > 0)
       grid = Integer.parseInt(args[0]);