fs/test.sh | 2 ++

diff --git a/fs/test.sh b/fs/test.sh
index 36abc1afaa87c5230a25c57a1959cc314f82385c..f6d367c22dd3a7e5ed471bb279ab995de835f735 100755
--- a/fs/test.sh
+++ b/fs/test.sh
@@ -10,3 +10,5 @@ file=debian-9.1.0-amd64-netinst.iso
 # file=sintel.mp4
 while [ ! -e "mnt/$file" ]; do sleep 1; done
 pv "mnt/$file" | md5sum
+umount mnt
+wait