diff --git a/racket/collects/json/main.rkt b/racket/collects/json/main.rkt
index 93e4d85609..c76f411754 100644
--- a/racket/collects/json/main.rkt
+++ b/racket/collects/json/main.rkt
@@ -14,6 +14,12 @@
 (require syntax/readerr
          racket/contract)
 
+;; tests in: 
+;; ~plt/pkgs/racket-test/tests/json/
+
+;; docs in:
+;; ~plt/pkgs/racket-doc/json/
+
 ;; -----------------------------------------------------------------------------
 ;; SERVICES