diff --git a/test/test-graph-type.rkt b/test/test-graph-type.rkt
index c35060d..3ca5006 100644
--- a/test/test-graph-type.rkt
+++ b/test/test-graph-type.rkt
@@ -18,7 +18,8 @@
   #:invariant City.citizens._ ∋ City.streets._.houses._.owner)
 
 (module* test racket/base
-  (require (for-syntax racket/pretty)
+  (require (for-syntax racket/pretty
+                       racket/base)
            (submod ".."))
   (eval #'(begin
             (define-syntax (dbg _stx)