Testng test with parameters shows $testMethod.qualifiedName as test name in reports

I am using clover 3.1.0, jdk 1.6 and maven 3.0.3

I have a test that takes a parameter as input, and the report is generated using

mvn clover2:setup test clover2:aggregate clover2:clover

In report, the testmethod is showing up as $testMethod.qualifiedName

Please see the attached picture for more details. When I click the link on that particular method, it is giving me a directory listing instead of actual source.