Summary
When building pubsub-light-plugin, the test MessageOriginIdentityTest passes if run by itself, as with a mvn clean test -Dtest=MessageOriginIdentityTest. But when run along with the remaining tests as with a regular mvn clean test, the test fails.

Other findings
I renamed MessageOriginIdentityTest to AAMessageOriginIdentityTest. This caused the test to pass just fine when run in the group, I suppose because it was run first?