diff --git a/pkgs/plai/tests/gc2/good-collectors/trivial-collector.rkt b/pkgs/plai/tests/gc2/good-collectors/trivial-collector.rkt
index 1d6b5e5723..86e9fd8427 100644
--- a/pkgs/plai/tests/gc2/good-collectors/trivial-collector.rkt
+++ b/pkgs/plai/tests/gc2/good-collectors/trivial-collector.rkt
@@ -15,7 +15,6 @@
         [i (in-naturals 1)])
     (heap-set! (+ 1 i heap-ptr) (read-root r)))
   (set! heap-ptr (+ len 2 heap-ptr))
-  ;; return the location of this flat data
   (- heap-ptr len 2))
 
 (define (gc:closure-code-ptr a)