diff --git a/collects/tests/typed-racket/tr-random-testing.rkt b/collects/tests/typed-racket/tr-random-testing.rkt
index f124ab7800..fc3e5066e4 100644
--- a/collects/tests/typed-racket/tr-random-testing.rkt
+++ b/collects/tests/typed-racket/tr-random-testing.rkt
@@ -18,7 +18,7 @@
 (b:init) (n:init)
 (define-namespace-anchor anch)
 
-todo: exact numbers
+;; TODO exact numbers
 
 (define-language tr-arith ; to stay within floats, removed some numeric ops
   [n real]