Fixed test suite

.travis.yml

@@ -3,15 +3,14 @@ sudo: false
 language: python
 
 python:
+  - "3.4"
   - "3.5"
+  - "3.6"
+  - "3.7"
 
 env:
-  - TOXENV=py27-django18-normal,py33-django18-normal
-  - TOXENV=py27-django18-custom,py33-django18-custom
-  - TOXENV=py27-django19-normal,py34-django19-normal
-  - TOXENV=py27-django19-custom,py34-django19-custom
-  - TOXENV=py27-django110-normal,py34-django110-normal,py35-django110-normal
-  - TOXENV=py27-django110-custom,py34-django110-custom,py35-django110-custom
+  - TOXENV=py34-django30-normal,py35-django30-normal,py36-django30-normal,py37-django30-normal
+  - TOXENV=py34-django30-custom,py35-django30-custom,py36-django30-custom,py37-django30-custom
 
 cache:
   directories:

tox.ini

@@ -1,24 +1,22 @@
 [tox]
-envlist = py{27,33}-django{18}-{normal,custom},py{27,34,35}-django{19,110}-{normal,custom},docs
+envlist = py{34,35, 36, 37}-django{30}-{normal,custom},docs
 
 [testenv]
 commands = coverage run runtests.py
 basepython =
-    py27: python2.7
     py33: python3.3
     py34: python3.4
     py35: python3.5
+    py36: python3.6
+    py37: python3.7
 deps =
     coverage>=4.2,<4.3
-    django18: Django>=1.8,<1.9
-    django19: Django>=1.9,<1.10
-    django110: Django>=1.10,<1.11
-    py27: mock>=1.0,<2.0
+    django30: Django>=3.0,<3.1
 setenv =
     custom: SWAPPED=1
 
 [testenv:docs]
-basepython = python2.7
+basepython = python3.4
 deps = Sphinx==1.1.3
 commands =
     {envbindir}/sphinx-build -a -n -b html -d docs/_build/doctrees docs docs/_build/html