systemd 245.4-4ubuntu3.2 ADT test failure with linux-aws 5.4.0-1022.22

Testing failed on:
    amd64: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-focal/focal/amd64/s/systemd/20200817_235646_79e19@/log.gz

The testcase systemd-fsckd is falling with several kernels in Focal:

======================================================================
FAIL: test_fsck_with_failure (__main__.FsckdTest)
Ensure that a failing fsck doesn't prevent fsckd to stop
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/autopkgtest.wrZrJf/build.LgN/src/debian/tests/systemd-fsckd", line 100, in test_fsck_wi
th_failure
    self.assertFalse(self.is_failed_unit('process-killer'))
AssertionError: True is not false

======================================================================
FAIL: test_systemd_fsck_with_failure (__main__.FsckdTest)
Ensure that a failing systemd-fsck doesn't prevent fsckd to stop
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/autopkgtest.wrZrJf/build.LgN/src/debian/tests/systemd-fsckd", line 114, in test_systemd_fsck_with_failure
    self.assertProcessKilled()
  File "/tmp/autopkgtest.wrZrJf/build.LgN/src/debian/tests/systemd-fsckd", line 204, in assertProcessKilled
    self.assertFalse(self.is_failed_unit('process-killer'))
AssertionError: True is not false