Fix the travis test matrix

.travis.yml

@@ -1,23 +1,16 @@
 ---
 
 language: python
-python: "2.7"
+python:
+  - "2.7"
+  - "3.6"
 
 sudo: required
 
 # Enable the docker service
 services:
   - docker
 
-env:
-  # Use the docker driver for tests
-  global:
-    - MOLECULE_DRIVER_NAME=docker
-  # Enable matrix builds
-  matrix:
-    - MOLECULE_TARGET_DISTRO=centos-7
-    - MOLECULE_TARGET_DISTRO=ubuntu-1604
-
 # Replace aufs with the vfs docker storage driver
 # to prevent systemd to fail starting docker in docker.
 before_install:
@@ -29,6 +22,13 @@ before_install:
 install:
   - pip install tox-travis
 
+# Parallel testing of the supported Ansible versions
+env:
+  matrix:
+    - ANSIBLE=2.6
+    - ANSIBLE=2.7
+    - ANSIBLE=2.8
+
 # Tests all the scenarios
 script:
   - tox

tox.ini

@@ -1,8 +1,14 @@
 [tox]
 minversion = 1.8
-envlist = py{27}-ansible{26,27,28}
+envlist = py{27,36}-ansible{26,27,28}
 skipsdist = true
 
+[travis:env]
+ANSIBLE=
+  2.6: ansible26
+  2.7: ansible27
+  2.8: ansible28
+
 [testenv]
 passenv = *
 deps =