This patch comes from upstream:

--- a/Lib/test/test_pyexpat.py

+++ b/Lib/test/test_pyexpat.py

@@ -656,11 +656,9 @@ class MalformedInputTest(unittest.TestCa

# \xc2\x85 is UTF-8 encoded U+0085 (NEXT LINE)

xml = b"<?xml version\xc2\x85='1.0'?>\r\n"

parser = expat.ParserCreate()

- try:

+ err_pattern = r'XML declaration not well-formed: line 1, column \d+'

+ with self.assertRaisesRegex(expat.ExpatError, err_pattern):

parser.Parse(xml, True)

- self.fail()

- except expat.ExpatError as e:

- self.assertEqual(str(e), 'XML declaration not well-formed: line 1, column 14')

class ErrorMessageTest(unittest.TestCase):

def test_codes(self):