diff --git a/llo-index.yml b/llo-index.yml
index a824172..dded1a7 100644
--- a/llo-index.yml
+++ b/llo-index.yml
@@ -23,7 +23,7 @@
       options: ""
       mimetype: "text/plain"
       output:
-        file: ""
+        file: "testfile"
         options: ""
         mimetype: "text/img"
     challenge: