diff --git a/src/twisted/words/test/test_domish.py b/src/twisted/words/test/test_domish.py
index a8f8fa7..cfa3143 100644
--- a/src/twisted/words/test/test_domish.py
+++ b/src/twisted/words/test/test_domish.py
@@ -194,17 +194,6 @@ class ElementTests(unittest.TestCase):
             "Bytes behavior of addContent only provided on Python 3.")
 
 
-    def test_addContentBytesNonASCII(self):
-        """
-        Non-ASCII byte strings passed to C{addContent} yield L{UnicodeError}.
-        """
-        element = domish.Element((u"testns", u"foo"))
-        self.assertRaises(UnicodeError, element.addContent, b'\xe2\x98\x83')
-    if _PY3:
-        test_addContentBytesNonASCII.skip = (
-            "Bytes behavior of addContent only provided on Python 2.")
-
-
     def test_addElementContent(self):
         """
         Content passed to addElement becomes character data on the new child.