b-l072z-lrwan1: tests/ztimer_overhead: test failure

[kaspar030]

Description

Found during 2023.01 release testing:

WARNING:b-l072z-lrwan1.tests/ztimer_overhead:make RIOT_CI_BUILD=1 CC_NOCOLOR=1 --no-print-directory -C ./tests/ztimer_overhead test
r
ssh -t rici@saclay.iot-lab.info 'socat - tcp:st-lrwan1-10.saclay.iot-lab.info:20000' 
Help: Press s to start test, r to print it is ready
Help: Press s to start test, r to print it is ready
READY
s
START
main(): This is RIOT! (Version: buildtest)
ZTIMER_USEC auto_adjust params:
    ZTIMER_USEC->adjust_set = 21
    ZTIMER_USEC->adjust_sleep = 25
ZTIMER_USEC auto_adjust params cleared
zitmer_overhead_set...
min=20 max=21 avg_diff=20
zitmer_overhead_sleep...
min=27 max=27 avg_diff=27
ZTIMER_USEC adjust params for b-l072z-lrwan1:
    CONFIG_ZTIMER_USEC_ADJUST_SET    20
    CONFIG_ZTIMER_USEC_ADJUST_SLEEP  27

Traceback (most recent call last):
  File "/home/runner/work/RIOT/RIOT/tests/ztimer_overhead/tests/01-run.py", line 33, in <module>
    sys.exit(run(testfunc))
  File "/home/runner/work/RIOT/RIOT/dist/pythonlibs/testrunner/__init__.py", line 30, in run
    testfunc(child)
  File "/home/runner/work/RIOT/RIOT/tests/ztimer_overhead/tests/01-run.py", line 29, in testfunc
    assert auto_adjust_sleep >= adjust_sleep - ADJUST_SLEEP_MARGIN
AssertionError
make: *** [/home/runner/work/RIOT/RIOT/makefiles/tests/tests.inc.mk:26: test] Error 1

Return value: 2

Steps to reproduce the issue

Expected results

Actual results

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