Fix issue #190

Author: dnozay

xmlrunner/runner.py

@@ -3,6 +3,8 @@
 import sys
 import time
 
+import six
+
 from .unittest import TextTestRunner, TestProgram
 from .result import _XMLTestResult
 
@@ -17,8 +19,10 @@ class XMLTestRunner(TextTestRunner):
     """
     def __init__(self, output='.', outsuffix=None, 
                  elapsed_times=True, encoding=UTF8,
-                 resultclass=None,
+                 resultclass=None, warnings=None,
                  **kwargs):
+        if six.PY3:
+            kwargs['warnings'] = warnings
         super(XMLTestRunner, self).__init__(**kwargs)
         self.output = output
         self.encoding = encoding