diff --git a/Jenkinsfile b/Jenkinsfile
index e771b34..bd0c36e 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -44,7 +44,8 @@
         [ exec: { echo "This is my first task" }, ],
         [ exec: { echo "This is my second task" }, inside: '*' ],
         [ exec: "third.sh", inside: [ 'ubuntu-16', 'centos-7', ] ],
-        [ exec: [ "fourth-a.sh", "fourth-b.sh"] ],
+        [ exec: [ "fourth-a.sh", "fourth-b.sh"], on: 'mac' ],
+        [ exec: [ "fourth-a.sh", "fourth-b.sh"], on: 'android' ],
     ]
 }