diff --git a/tests/let.test b/tests/let.test
index c7682c3a..0c936248 100755
--- a/tests/let.test
+++ b/tests/let.test
@@ -1,5 +1,7 @@
 #! /bin/sh
 # -*-scheme-*-
+MES_BOOT=boot-5.mes
+export MES_BOOT
 exec ${MES-bin/mes} --no-auto-compile -L ${0%/*} -L module -C module -e '(tests let)' -s "$0" "$@"
 !#
 
@@ -24,12 +26,8 @@ exec ${MES-bin/mes} --no-auto-compile -L ${0%/*} -L module -C module -e '(tests
 ;;; along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
 
 (define-module (tests let)
-  #:use-module (mes mes-0)
   #:use-module (mes test))
 
-(mes-use-module (mes let))
-(mes-use-module (mes test))
-
 (pass-if "first dummy" #t)
 (pass-if-not "second dummy" #f)