diff --git a/remix/tests/simple.rkt b/remix/tests/simple.rkt
index a9da67c..edbbc10 100644
--- a/remix/tests/simple.rkt
+++ b/remix/tests/simple.rkt
@@ -1,4 +1,7 @@
 #lang remix
+;; This requires changes to Racket that are not yet pushed, but will
+;; be once the release branch is made.
+
 (require remix/stx0
          remix/num/gen0)