btullis@stat1008:~$ systemctl --failed
  UNIT                LOAD   ACTIVE SUB    DESCRIPTION
● session-c1408.scope loaded failed failed Session c1408 of user debmonitor
● session-c1409.scope loaded failed failed Session c1409 of user debmonitor
● session-c1804.scope loaded failed failed Session c1804 of user debmonitor
● uuidd.service       loaded failed failed Daemon for generating UUIDs

LOAD   = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB    = The low-level unit activation state, values depend on unit type.
4 loaded units listed.
btullis@stat1008:~$ sudo systemctl reset-failed 
btullis@stat1008:~$ systemctl --failed
  UNIT LOAD ACTIVE SUB DESCRIPTION
0 loaded units listed.
btullis@stat1008:~$