diff --git a/tests/data/test1560 b/tests/data/test1560
index 381faaa93a..976cc98ec2 100644
--- a/tests/data/test1560
+++ b/tests/data/test1560
@@ -13,7 +13,7 @@ urlapi
 none
 </server>
 <setenv>
-LANG=en_US.UTF-8
+LC_ALL=en_US.UTF-8
 </setenv>
 <features>
 file