cxxtestgen --xunit-printer -o runner.cpp Testerrr.h --error-printer
produces a "TEST-cxxtest.xml" containing
Running cxxtest tests (2 tests).
In Testerrr::TestFail:
./Testerrr.h:25: Error: Expected (1==0), found (1 != 0)
Failed 1 and Skipped 0 of 2 tests
Success rate: 50%
Expected the xml version in the xml file, or a different file (without .xml extension) or something not a composite of the two runners.