Runing tests with --xml fails with UnicodeEncodeError

[francisdb]

This runs correctly without --xml

 Traceback (most recent call last):
   File "./manage.py", line 11, in <module>
     execute_manager(settings)
   File "/usr/lib/pymodules/python2.6/django/core/management/__init__.py", line 438, in execute_manager
    utility.execute()
  File "/usr/lib/pymodules/python2.6/django/core/management/__init__.py", line 379, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/lib/pymodules/python2.6/django/core/management/base.py", line 191, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/usr/lib/pymodules/python2.6/django/core/management/base.py", line 220, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python2.6/dist-packages/django_test_extensions-0.9-py2.6.egg/test_extensions/management/commands/test.py", line 125, in handle
    failures = test_runner(**test_options).run_tests(test_labels)
  File "/usr/lib/pymodules/python2.6/django/test/simple.py", line 314, in run_tests
    result = self.run_suite(suite)
  File "/usr/local/lib/python2.6/dist-packages/django_test_extensions-0.9-py2.6.egg/test_extensions/testrunners/xmloutput.py", line 12, in run_suite
    return XMLTestRunner(verbosity=self.verbosity).run(suite)
  File "/usr/local/lib/python2.6/dist-packages/django_test_extensions-0.9-py2.6.egg/test_extensions/testrunners/xmlunit/unittest.py", line 815, in run
    self._writeReport(result,self.totalTime)
  File "/usr/local/lib/python2.6/dist-packages/django_test_extensions-0.9-py2.6.egg/test_extensions/testrunners/xmlunit/unittest.py", line 833, in _writeReport
    self.output.write(self.stdout.read())
UnicodeEncodeError: 'ascii' codec can't encode character u'\xe8' in position 569: ordinal not in range(128)