What steps will reproduce the problem?
1. Have some JUnit tests as a part of Gerrit build verification tests
2. Which I run as: adb shell am instrument -w -e size small com.package.domain/android.support.test.runner.AndroidJUnitRunner

What is the expected output?
If any of the adb tests failed gerrit trigger build should be unstable

What do you see instead?
Build post as Success even the tests failed