The problem seen multiple times on MacOS:

[ RUN ] LogDecorations.timestamps_test
[ OK ] LogDecorations.timestamps_test (79 ms)
[ RUN ] LogDecorations.iso8601_time_test
/opt/jprt/T/P1/170438.amurillo/s/hotspot/test/native/logging/test_logDecorations.cpp:155: Failure
Expected: (diff) <= (10), actual: 3600 vs 10
Reported time: 1472413042 (2016-08-28T23:37:22.389-0300), expected time: 1472416642
[ FAILED ] LogDecorations.iso8601_time_test (0 ms)
[ RUN ] LogDecorations.identifiers_test
[ OK ] LogDecorations.identifiers_test (0 ms)
[----------] 6 tests from LogDecorations (115 ms total)