diff --git a/pkgs/racket-test/tests/racket/deterministic-zo.rkt b/pkgs/racket-test/tests/racket/deterministic-zo.rkt
index 29e7e8e413..0b588bf910 100644
--- a/pkgs/racket-test/tests/racket/deterministic-zo.rkt
+++ b/pkgs/racket-test/tests/racket/deterministic-zo.rkt
@@ -69,4 +69,4 @@
 
 (module+ test
   (module config info
-    (define timeout 300)))
+    (define timeout 600)))