diff --git a/collects/tests/compiler/zo-exs.rkt b/collects/tests/compiler/zo-exs.rkt
index 3bd665ca04..2abdaab4ff 100644
--- a/collects/tests/compiler/zo-exs.rkt
+++ b/collects/tests/compiler/zo-exs.rkt
@@ -31,7 +31,7 @@
                      (prefix 0 empty empty)
                      (list 1 (list 2 3) (list 2 3) 4 5)))
  
- (roundtrip
+ #;(roundtrip
   (compilation-top 0 
                    (prefix 0 empty empty)
                    (let* ([ph (make-placeholder #f)]