diff --git a/pkgs/racket-test-core/tests/racket/sync.rktl b/pkgs/racket-test-core/tests/racket/sync.rktl
index aeb6627bb0..c7d1220aef 100644
--- a/pkgs/racket-test-core/tests/racket/sync.rktl
+++ b/pkgs/racket-test-core/tests/racket/sync.rktl
@@ -1432,7 +1432,7 @@
       (test val values got)))
 
   (try values 'ok-channel)
-  (try (lambda (c) (choice-evt c (alarm-evt (+ 10000 (current-milliseconds)))))
+  (try (lambda (c) (choice-evt c (alarm-evt (+ 10000 (current-inexact-milliseconds)))))
        'ok-channel+alarm))
 
 ;; ----------------------------------------