diff --git a/tests/data/test1560 b/tests/data/test1560
index f6722fd419..ca7c6a9205 100644
--- a/tests/data/test1560
+++ b/tests/data/test1560
@@ -12,6 +12,9 @@ URLAPI
 <server>
 none
 </server>
+<setenv>
+LANG=en_US.UTF-8
+</setenv>
 <features>
 file
 https