diff --git a/shell/ash_test/ash-vars/var-utf8-length.tests b/shell/ash_test/ash-vars/var-utf8-length.tests
index d04b2cb..b6e87f1 100755
--- a/shell/ash_test/ash-vars/var-utf8-length.tests
+++ b/shell/ash_test/ash-vars/var-utf8-length.tests
@@ -1,2 +1,4 @@
+LANG=en_US.UTF-8
+LC_ALL=en_US.UTF-8
 X=abcdÉfghÍjklmnÓpqrstÚvwcyz
 echo ${#X}