diff --git a/tests/virttest b/tests/virttest
index be0e421daf423a75dd1714c0b1b62cdbd879d08d..7911876f8cd023510fe62505cc9fb31ad2dffd85 100755
--- a/tests/virttest
+++ b/tests/virttest
@@ -292,13 +292,21 @@ done
 ok=0
 all=0
 
-# image file system config
-if [ $os_mount == "cifs" -o $os_mount == "nfs" -o $os_mount == "initramfs" ]; then
-    mount /dev/sdb ${images_path} || echo y | mkfs.ext4 /dev/sdb && mount /dev/sdb ${images_path}
+# config tmp dir
+config_tmpdir() {
+    umount /var/tmp > /dev/null  2>&1
     rm -rf ${images_path:?}/tmp
     mkdir -p ${images_path}/tmp
+    [ -d /var/tmp ] || mkdir -p /var/tmp
+    export TMP="/var/tmp"
     mount --bind ${images_path}/tmp /var/tmp
+}
+
+# image file system config
+if [ $os_mount == "cifs" -o $os_mount == "nfs" -o $os_mount == "initramfs" ]; then
+    mount /dev/sdb ${images_path} || echo y | mkfs.ext4 /dev/sdb && mount /dev/sdb ${images_path}
 fi
+config_tmpdir
 
 # download images
 images_download