see logs in :

https://luci-logdog.appspot.com/v/?s=chromeos%2Fbb%2Fchromeos_release%2Fguado_moblab-release_release-R60-9592.B%2F1%2F%2B%2Frecipes%2Fsteps%2FUnitTest%2F0%2Fstdout

authpolicy-0.0.1-r391: [----------] Global test environment tear-down
authpolicy-0.0.1-r391: [==========] 115 tests from 7 test cases ran. (3253 ms total)
authpolicy-0.0.1-r391: [  PASSED  ] 113 tests.
authpolicy-0.0.1-r391: [  FAILED  ] 2 tests, listed below:
authpolicy-0.0.1-r391: [  FAILED  ] AuthPolicyFlagsTest.TestAllFlagsOn
authpolicy-0.0.1-r391: [  FAILED  ] AuthPolicyFlagsTest.FlagsSerialization
authpolicy-0.0.1-r391: 
authpolicy-0.0.1-r391:  2 FAILED TESTS
authpolicy-0.0.1-r391: Error: /var/cache/portage/chromeos-base/authpolicy/out/Default/authpolicy_test: failed with exit code 1
authpolicy-0.0.1-r391:  * ERROR: chromeos-base/authpolicy-0.0.1-r391::chromiumos failed (test phase):
authpolicy-0.0.1-r391:  *   (no error message)
authpolicy-0.0.1-r391:  * 
authpolicy-0.0.1-r391:  * Call stack:
authpolicy-0.0.1-r391:  *     ebuild.sh, line   93:  Called src_test
authpolicy-0.0.1-r391:  *   environment, line 3972:  Called platform_src_test
authpolicy-0.0.1-r391:  *   environment, line 3566:  Called platform_pkg_test
authpolicy-0.0.1-r391:  *   environment, line 3548:  Called platform_test 'run' '/build/guado_moblab/var/cache/portage/chromeos-base/authpolicy/out/Default/authpolicy_test'
authpolicy-0.0.1-r391:  *   environment, line 3599:  Called die
authpolicy-0.0.1-r391:  * The specific snippet of code:
authpolicy-0.0.1-r391:  *       "${cmd[@]}" || die
authpolicy-0.0.1-r391:  *