language: php
php:
  - "5.4"
  - "5.5"
  - "5.6"
before_script:
  - curl http://getcomposer.org/installer | php
  - php composer.phar install
script: phpunit

language: php
php:
  - "5.4"
  - "5.5"
  - "5.6"
before_script:
  - curl http://getcomposer.org/installer | php
  - php composer.phar install
script: vendor/bin/phpunit

Use required PHPUnit on Travis as well
Fix: Use required PHPUnit on Travis as well
