update pytest to latest stable

test/test_regression.py

@@ -57,7 +57,7 @@ class TestRegression(TestCase):
 
         self.assertRaises(jedi.NotFoundError, get_def, cls)
 
-    @pytest.mark.skip('Skip for now, test case is not really supported.')
+    @pytest.mark.skipif('True', reason='Skip for now, test case is not really supported.')
     @cwd_at('jedi')
     def test_add_dynamic_mods(self):
         fname = '__main__.py'

tox.ini

@@ -2,7 +2,7 @@
 envlist = py26, py27, py32, py33, py34
 [testenv]
 deps =
-    https://bitbucket.org/hpk42/pytest/get/c4f58165e0d4.zip
+    pytest>=2.3.5
 # docopt for sith doctests
     docopt
 # coloroma for colored debug output