fix tests

* add mock dependency in tox.ini for python older than 3.3
* set tox minimum version to 1.4: set basepython for python older than 3.3

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/__init__.py b/tests/__init__.py
index 42a7e20..2686fbc 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -9,7 +9,7 @@ try:
 except ImportError:
     import unittest
 try:
-    from unittest.mock import mock
+    from unittest import mock
 except ImportError:
     import mock