diff --git a/tools/bltk/bltk_get_hdparm.sh b/tools/bltk/bltk_get_hdparm.sh
index 4f6a53b..72ca33d 100644
--- a/tools/bltk/bltk_get_hdparm.sh
+++ b/tools/bltk/bltk_get_hdparm.sh
@@ -57,8 +57,8 @@ PARTITIONS=$1
 
 FOUND=0
 READING=0
-TMP_FILE=$BLTK_ROOT/tmp/hdparm
-DEV_INFO=$BLTK_HOME/tmp/dev_info
+TMP_FILE=`mktemp`.hdparm
+DEV_INFO=`mktemp`.dev_info
 
 /usr/bin/udisksctl dump > $TMP_FILE