bionic verification:

root@lp1849261-b:~# dpkg -l systemd | grep ii
ii  systemd        237-3ubuntu10.39 amd64        system and service manager
root@lp1849261-b:~# systemctl status test failure
● test.service
   Loaded: loaded (/etc/systemd/system/test.service; static; vendor preset: enab
   Active: inactive (dead)

● failure.service
   Loaded: loaded (/etc/systemd/system/failure.service; static; vendor preset: e
   Active: inactive (dead)
root@lp1849261-b:~# systemctl start test
root@lp1849261-b:~# sleep 10 ; systemctl status test failure
● test.service
   Loaded: loaded (/etc/systemd/system/test.service; static; vendor preset: enab
   Active: active (running) since Sun 2020-02-16 14:42:27 UTC; 2s ago
 Main PID: 1338 (sh)
    Tasks: 2 (limit: 4702)
   CGroup: /system.slice/test.service
           ├─1338 /bin/sh -c /bin/sleep 10; /bin/false
           └─1342 /bin/sleep 10

Feb 16 14:42:27 lp1849261-b systemd[1]: Started test.service.

● failure.service
   Loaded: loaded (/etc/systemd/system/failure.service; static; vendor preset: e
   Active: inactive (dead)
root@lp1849261-b:~# journalctl -b -u test --no-pager
-- Logs begin at Fri 2019-12-13 00:52:50 UTC, end at Sun 2020-02-16 14:43:08 UTC. --
Feb 16 14:42:06 lp1849261-b systemd[1]: Started test.service.
Feb 16 14:42:16 lp1849261-b systemd[1]: test.service: Main process exited, code=exited, status=1/FAILURE
Feb 16 14:42:16 lp1849261-b systemd[1]: test.service: Failed with result 'exit-code'.
Feb 16 14:42:16 lp1849261-b systemd[1]: test.service: Service hold-off time over, scheduling restart.
Feb 16 14:42:16 lp1849261-b systemd[1]: test.service: Scheduled restart job, restart counter is at 1.
Feb 16 14:42:16 lp1849261-b systemd[1]: Stopped test.service.
Feb 16 14:42:16 lp1849261-b systemd[1]: Started test.service.
Feb 16 14:42:26 lp1849261-b systemd[1]: test.service: Main process exited, code=exited, status=1/FAILURE
Feb 16 14:42:26 lp1849261-b systemd[1]: test.service: Failed with result 'exit-code'.
Feb 16 14:42:27 lp1849261-b systemd[1]: test.service: Service hold-off time over, scheduling restart.
Feb 16 14:42:27 lp1849261-b systemd[1]: test.service: Scheduled restart job, restart counter is at 2.
Feb 16 14:42:27 lp1849261-b systemd[1]: Stopped test.service.
Feb 16 14:42:27 lp1849261-b systemd[1]: Started test.service.
Feb 16 14:42:37 lp1849261-b systemd[1]: test.service: Main process exited, code=exited, status=1/FAILURE
Feb 16 14:42:37 lp1849261-b systemd[1]: test.service: Failed with result 'exit-code'.
Feb 16 14:42:37 lp1849261-b systemd[1]: test.service: Service hold-off time over, scheduling restart.
Feb 16 14:42:37 lp1849261-b systemd[1]: test.service: Scheduled restart job, restart counter is at 3.
Feb 16 14:42:37 lp1849261-b systemd[1]: Stopped test.service.
Feb 16 14:42:37 lp1849261-b systemd[1]: Started test.service.
Feb 16 14:42:47 lp1849261-b systemd[1]: test.service: Main process exited, code=exited, status=1/FAILURE
Feb 16 14:42:47 lp1849261-b systemd[1]: test.service: Failed with result 'exit-code'.
Feb 16 14:42:47 lp1849261-b systemd[1]: test.service: Service hold-off time over, scheduling restart.
Feb 16 14:42:47 lp1849261-b systemd[1]: test.service: Scheduled restart job, restart counter is at 4.
Feb 16 14:42:47 lp1849261-b systemd[1]: Stopped test.service.
Feb 16 14:42:47 lp1849261-b systemd[1]: Started test.service.
Feb 16 14:42:57 lp1849261-b systemd[1]: test.service: Main process exited, code=exited, status=1/FAILURE
Feb 16 14:42:57 lp1849261-b systemd[1]: test.service: Failed with result 'exit-code'.
Feb 16 14:42:57 lp1849261-b systemd[1]: test.service: Service hold-off time over, scheduling restart.
Feb 16 14:42:57 lp1849261-b systemd[1]: test.service: Scheduled restart job, restart counter is at 5.
Feb 16 14:42:57 lp1849261-b systemd[1]: Stopped test.service.
Feb 16 14:42:57 lp1849261-b systemd[1]: Started test.service.
Feb 16 14:43:07 lp1849261-b systemd[1]: test.service: Main process exited, code=exited, status=1/FAILURE
Feb 16 14:43:07 lp1849261-b systemd[1]: test.service: Failed with result 'exit-code'.
Feb 16 14:43:08 lp1849261-b systemd[1]: test.service: Service hold-off time over, scheduling restart.
Feb 16 14:43:08 lp1849261-b systemd[1]: test.service: Scheduled restart job, restart counter is at 6.
Feb 16 14:43:08 lp1849261-b systemd[1]: Stopped test.service.
Feb 16 14:43:08 lp1849261-b systemd[1]: Started test.service.
root@lp1849261-b:~# journalctl -b -u failure --no-pager
-- Logs begin at Fri 2019-12-13 00:52:50 UTC, end at Sun 2020-02-16 14:43:18 UTC. --
-- No entries --