How to touch a file at shutdown

I'm working on Ubuntu 16.04.3 and I need to create a file at the OS shutdown time.

After reading this link: https://unix.stackexchange.com/questions/39226/how-to-run-a-script-with-systemd-right-before-shutdown

I created a file named test.service at /lib/systemd/system/ and here is the content:

[Unit]
Description=test

[Service]
Type=oneshot
ExecStart=/bin/true
ExecStop=/home/test.sh

[Install]
WantedBy=multi-user.target

Here is /home/test.sh:

#!/bin/bash

touch /home/myfile

However, after rebooting the system, I cannot see any file named /home/myfile.