diff --git a/.travis.yml b/.travis.yml
index 15ed377..3fda027 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,12 @@ env:
     version: 7
     init: /usr/lib/systemd/systemd
     run_opts: "--privileged --volume=/sys/fs/cgroup:/sys/fs/cgroup:ro"
+  # Ubuntu 12.04.
+  # - container_id: $(mktemp)
+  #   distribution: ubuntu
+  #   version: 12.04
+  #   init: /sbin/init
+  #   run_opts: ""
   # Ubuntu 14.04.
   - container_id: $(mktemp)
     distribution: ubuntu
@@ -22,11 +28,11 @@ before_install:
   # Pull container.
   - "sudo docker pull ${distribution}:${version}"
   # Customize container.
-  - "sudo docker build --rm=true --file=tests/Dockerfile.${distribution} --tag=${distribution}:ansible tests"
+  - "sudo docker build --rm=true --file=tests/Dockerfile.${distribution}.${version} --tag=${distribution}:${version}:ansible tests"
 
 script:
   # Run container in detached state.
-  - sudo docker run --detach --volume="${PWD}":/etc/ansible/roles/role_under_test:ro ${run_opts} ${distribution}:ansible "${init}" > "${container_id}"
+  - 'sudo docker run --detach --volume="${PWD}":/etc/ansible/roles/role_under_test:ro ${run_opts} ${distribution}:${version}:ansible "${init}" > "${container_id}"'
 
   # Ansible syntax check.
   - 'sudo docker exec --tty "$(cat ${container_id})" env TERM=xterm ansible-playbook /etc/ansible/roles/role_under_test/tests/test.yml --syntax-check'
diff --git a/tests/Dockerfile.centos b/tests/Dockerfile.centos.7
similarity index 100%
rename from tests/Dockerfile.centos
rename to tests/Dockerfile.centos.7
diff --git a/tests/Dockerfile.ubuntu b/tests/Dockerfile.ubuntu.12.04
similarity index 100%
rename from tests/Dockerfile.ubuntu
rename to tests/Dockerfile.ubuntu.12.04
diff --git a/tests/Dockerfile.ubuntu.14.04 b/tests/Dockerfile.ubuntu.14.04
new file mode 100644
index 0000000..1475a46
--- /dev/null
+++ b/tests/Dockerfile.ubuntu.14.04
@@ -0,0 +1,10 @@
+FROM ubuntu:14.04
+
+# Install Ansible
+RUN apt-get install -y software-properties-common git
+RUN apt-add-repository -y ppa:ansible/ansible
+RUN apt-get update
+RUN apt-get install -y ansible
+
+# Install Ansible inventory file
+RUN echo "[local]\nlocalhost ansible_connection=local" > /etc/ansible/hosts