diff --git a/private/html.rkt b/private/html.rkt
index 7335bf6..a1e3424 100644
--- a/private/html.rkt
+++ b/private/html.rkt
@@ -82,7 +82,9 @@
    (define covered? (make-covered? cov f))
    (check-equal? (make-html-file cov f "main.css")
                  `(html ()
-                   (head () (link ([rel "stylesheet"] [type "text/css"] [href "main.css"])))
+                   (head ()
+                         (meta ([charset "utf-8"]))
+                         (link ([rel "stylesheet"] [type "text/css"] [href "main.css"])))
                    (body ()
                          (p () "expr: 100%" (br ()))
                          (div ([class "code"])