Allowing the TestReport task to work using the XML files of JUnit

I am running some integration tests using my own internal test framework, and I am generating JUnit compatible XML files containing the results of the tests. Unfortunately, it seems that there is no way for me to use the TestReport task because its inputs are only Test tasks which I do not have.

It would be nice if TestReport could work without the Test tasks and work with alternative formats like the JUnit XML.