diff --git a/build/build.xml b/build/build.xml
index 3294d204a..1e5f0259b 100644
--- a/build/build.xml
+++ b/build/build.xml
@@ -222,7 +222,9 @@
     </exec>
     
     <copy todir="macosx/working_dir">
-      <fileset dir="macosx/work" />
+      <fileset dir="macosx/work">
+        <exclude name="**/ArduinoTestSuite/**" />
+      </fileset>
     </copy>
 
     <!-- The ant copy command does not preserve permissions. -->