test_os.test_timerfd_initval flaky test #118550

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FAIL: test_timerfd_initval (test.test_os.TimerfdTests.test_timerfd_initval)
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Traceback (most recent call last):
  File "/home/runner/work/cpython/cpython-ro-srcdir/Lib/test/test_os.py", line 4157, in test_timerfd_initval
    self.assertAlmostEqual(next_expiration, initial_expiration, places=self.CLOCK_RES_PLACES)
    ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AssertionError: 0.249496301 != 0.25 within 3 places (0.0005036989999999963 difference)