PHP:hhvm failed

[lucasfontesgaspareto]

Hi, i'm learning about travis and when i trying to build my fork i get fail in the last step

.travis.yml

language: php
php:
  - 5.5
  - 5.4
  - hhvm
script: phpunit Test.php

output in travis

0.44s$ phpunit Test.php
PHPUnit 6.3.0 by Sebastian Bergmann and contributors.
This version of PHPUnit is supported on PHP 7.0 and PHP 7.1.
You are using PHP 5.6.99-hhvm (/usr/bin/hhvm).
The command "phpunit Test.php" exited with 1.
Done. Your build exited with 1.