diff --git a/tests/script/sh/prepare_udf.sh b/tests/script/sh/prepare_udf.sh
index c197ccfa974c62375a265923840fab277819bd3a..c7822bd6e8acc6d9e47facfeff2b2645e6f1b1df 100644
--- a/tests/script/sh/prepare_udf.sh
+++ b/tests/script/sh/prepare_udf.sh
@@ -1,8 +1,9 @@
 #!/bin/sh
 
+mkdir /tmp
 echo -n "hello" > /tmp/normal
 echo -n "" > /tmp/empty
-dd if=/dev/zero bs=3584 of=/tmp/big count=1
+dd if=/dev/zero bs=3584 of=~/tmp/big count=1
 
 rm -rf /tmp/sum_double.so /tmp/add_one.so
 touch /tmp/normal