Comment 1 for bug 1504043

Try to change to the following in the file texttestlib/default/batch/junitreport.py

def _longMessage(self, test):
        message = escape(test.state.freeText.replace("]]>", "END_MARKER"))
        return message

I believe you are also currently working in the same office as the original author of this code, who may be able to help further :)