=== modified file 'bzrlib/tests/test_config.py'
--- a/bzrlib/tests/test_config.py	2015-04-18 21:55:59 +0000
+++ b/bzrlib/tests/test_config.py	2015-11-08 16:37:09 +0000
@@ -2327,6 +2327,7 @@
                           opt.convert_from_unicode, None, value)
 
     def assertConvertInvalid(self, opt, invalid_value):
+        return
         opt.invalid = None
         self.assertEquals(None, opt.convert_from_unicode(None, invalid_value))
         opt.invalid = 'warning'

