Sample error message:
======================================================================
FAIL: test_cover_files_written_no_highlight (test.test_trace.TestCoverageCommandLineOutput)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/buildbot/buildarea/cpython/3.x.ware-gentoo-x86.nondebug/build/Lib/test/test_trace.py", line 393, in test_cover_files_written_no_highlight
self.assertFalse(os.path.exists(tracecoverpath))
AssertionError: True is not false
----------------------------------------------------------------------
Ran 21 tests in 17.796s
FAILED (failures=1)
test test_trace failed
1 test failed again:
test_trace