diff --git a/test/Strings.java b/test/Strings.java
index 30a85163c9..76815af535 100644
--- a/test/Strings.java
+++ b/test/Strings.java
@@ -203,6 +203,8 @@ public class Strings {
             System.getProperty("line.separator").getBytes())));
     }
 
+    expect("abc".lastIndexOf('b', 100) == 1);
+
     testTrivialPattern();
   }
 }