I see some classes that look like tests in the main (non-test) source tree of at least one project: uima-ducc-cli (see for instance, org.apache.uima.ducc.cli.ws.json, there are classes "MachineFactsTest" and "ReservationFactsTest".
I think these should be moved to the normal maven spot (convention over configuration :-) ), so they get run automatically during the build (they would need to be turned into junit tests too). A scan of the code shows 9 classes with the word "test" as part of the name, and none of these are in the src/test/java conventional spot, so none of the tests are being run as part of the build, I think (I didn't check...). -Marshall