diff --git a/tests/src/java/com/threerings/media/tile/bundle/tools/BuildTestTileSetBundle.java b/tests/src/java/com/threerings/media/tile/bundle/tools/BuildTestTileSetBundle.java
index cc20593a6..f731981cd 100644
--- a/tests/src/java/com/threerings/media/tile/bundle/tools/BuildTestTileSetBundle.java
+++ b/tests/src/java/com/threerings/media/tile/bundle/tools/BuildTestTileSetBundle.java
@@ -1,5 +1,5 @@
 //
-// $Id: BuildTestTileSetBundle.java,v 1.5 2002/02/05 20:29:09 mdb Exp $
+// $Id: BuildTestTileSetBundle.java,v 1.6 2002/04/06 02:03:32 mdb Exp $
 
 package com.threerings.media.tile.bundle.tools;
 
@@ -55,6 +55,11 @@ public class BuildTestTileSetBundle
             return id.intValue();
         }
 
+        public boolean tileSetMapped (String tileSetName)
+        {
+            return containsKey(tileSetName);
+        }
+
         public void commit ()
             throws PersistenceException
         {