Index: test/alltests.py
===================================================================
--- test/alltests.py	(revision 4564)
+++ test/alltests.py	(revision 4629)
@@ -19,21 +19,10 @@
 
 import sys
 import os
-from types import UnicodeType
 import DocutilsTestSupport              # must be imported before docutils
 import docutils
 
 
-def new_exception_str(self):
-    for i in self.args:
-        if isinstance(i, UnicodeType):
-            raise RuntimeError('Error (unicode): %r' % (self.args,))
-    return old_exception_str(self)
-
-old_exception_str = Exception.__str__
-Exception.__str__ = new_exception_str
-
-
 class Tee:
 
     """Write to a file and a stream (default: stdout) simultaneously."""