avoid googletest stalling on exit tests when using OpenMPI

    auto mesg = ::testing::internal::GetCapturedStdout();

    ASSERT_THAT(mesg, MatchesRegex(".*ERROR: Expected integer .*"));

#if !defined(OMPI_MAJOR_VERSION) // this stalls with OpenMPI. skip.

    ASSERT_EXIT(lmp->input->one("quit"), ExitedWithCode(0), "");

    ASSERT_EXIT(lmp->input->one("quit 9"), ExitedWithCode(9), "");

#endif

}

TEST_F(SimpleCommandsTest, ResetTimestep)