autopilot crashes on failed test

With unity next, when a test fails, autopilot prints the following traceback and stops executing further tests. From what I've understood from this trace is that it ties to collect the applications debug print and bails out when there are non base ascii characters in it.

Traceback (most recent call last):
  File "/usr/bin/autopilot", line 317, in <module>
    main()
  File "/usr/bin/autopilot", line 297, in main
    run_tests(args)
  File "/usr/bin/autopilot", line 161, in run_tests
    success = runner.run(test_suite).wasSuccessful()
  File "/usr/bin/autopilot", line 227, in run
    return test.run(result)
  File "/usr/lib/python2.7/unittest/suite.py", line 108, in run
    test(result)
  File "/usr/lib/python2.7/unittest/case.py", line 396, in __call__
    return self.run(*args, **kwds)
  File "/usr/lib/python2.7/dist-packages/testscenarios/testcase.py", line 62, in run
    return super(TestWithScenarios, self).run(result)
  File "/usr/lib/python2.7/dist-packages/testtools/testcase.py", line 517, in run
    return self.__RunTest(self, self.exception_handlers).run(result)
  File "/usr/lib/python2.7/dist-packages/testtools/runtest.py", line 74, in run
    return self._run_one(actual_result)
  File "/usr/lib/python2.7/dist-packages/testtools/runtest.py", line 88, in _run_one
    return self._run_prepared_result(ExtendedToOriginalDecorator(result))
  File "/usr/lib/python2.7/dist-packages/testtools/runtest.py", line 107, in _run_prepared_result
    handler(self.case, self.result, e)
  File "/usr/lib/python2.7/dist-packages/testtools/testcase.py", line 493, in _report_failure
    result.addFailure(self, details=self.getDetails())
  File "/usr/lib/python2.7/dist-packages/testtools/testresult/real.py", line 513, in addFailure
    return self.decorated.addFailure(test, details=details)
  File "/usr/lib/python2.7/dist-packages/testtools/testresult/real.py", line 95, in addFailure
    self._err_details_to_string(test, err, details)))
  File "/usr/lib/python2.7/dist-packages/testtools/testresult/real.py", line 145, in _err_details_to_string
    return _details_to_str(details, special='traceback')
  File "/usr/lib/python2.7/dist-packages/testtools/testresult/real.py", line 679, in _details_to_str
    text = content.as_text().strip()
  File "/usr/lib/python2.7/dist-packages/testtools/content.py", line 78, in as_text
    return _u('').join(self.iter_text())
  File "/usr/lib/python2.7/dist-packages/testtools/content.py", line 103, in _iter_text
    for bytes in self.iter_bytes():
  File "/usr/lib/python2.7/dist-packages/testtools/content.py", line 82, in iter_bytes
    return self._get_bytes()
  File "/usr/lib/python2.7/dist-packages/testtools/content.py", line 197, in <lambda>
    return Content(UTF8_TEXT, lambda: [text.encode('utf8')])
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc2 in position 7531: ordinal not in range(128)