configre python 3.6 support for testing.

.travis.yml

@@ -1,14 +1,19 @@
 language: python
 python:
+    - 2.7
+    - 3.4
     - 3.5
-sudo: false
-env:
-    - TOXENV=py27
-    - TOXENV=py34
-    - TOXENV=py35
+    - 3.6
+    - pypy
+    - pypy3
 install:
-    - pip install tox
+    - pip install -U pip setuptools
+    - pip install -U zope.testrunner coverage coveralls
+    - pip install -U -e .[test]
 script:
-    - tox
+    - coverage run -m zope.testrunner --test-path=src
+after_success:
+    - coveralls
 notifications:
     email: false
+cache: pip

tox.ini

@@ -1,12 +1,18 @@
 [tox]
-envlist = coverage-clean, py27, py34, py35, coverage-report
+envlist =
+    py27,
+    py34,
+    py35,
+    py36,
+    pypy,
+    pypy3
 
 [testenv]
 commands =
-    coverage run setup.py test
-setenv =
-  COVERAGE_FILE=.coverage.{envname}
+    coverage run -m zope.testrunner --test-path=src {posargs:-vc}
 deps =
+    .[test]
+    zope.testrunner
     coverage
 
 [testenv:coverage-clean]
@@ -25,4 +31,4 @@ commands =
     coverage combine
     coverage report
     coverage html
-    coverage xml
+    coverage xml