tolerate --disable-unicode...

Lib/test/test_unary.py

 """Test compiler changes for unary ops (+, -, ~) introduced in Python 2.2"""
 
 import unittest
-from test_support import run_unittest
+from test_support import run_unittest, have_unicode
 
 class UnaryOpTestCase(unittest.TestCase):
 
@@ -44,7 +44,8 @@ class UnaryOpTestCase(unittest.TestCase):
     def test_bad_types(self):
         for op in '+', '-', '~':
             self.assertRaises(TypeError, eval, op + "'a'")
-            self.assertRaises(TypeError, eval, op + "u'a'")
+            if have_unicode:
+                self.assertRaises(TypeError, eval, op + "u'a'")
 
         self.assertRaises(TypeError, eval, "~2j")
         self.assertRaises(TypeError, eval, "~2.0")