Please disable verbose junit output for passing tests from things like toExplainPlanString (and also for result VoltTables in regression suites). Short progress messages are OK, like "starting textXYZ", "finished loading for testXYZ", and "ending testXYZ", but reserve detailed output for unexpected failure/error cases to make the interesting output easy to find.
If you disable them with something like "        //* enable for debug */ System.out.println(..."
it will be easy to re-enable for a particular query if it develops problems.