title: No tests found in class "AlliancesObjectTest" when PHPUnit testing
body: <p>I'm keep getting <code>No tests found in class "AlliancesObjectTest".</code> I tried it to run on vm and my machine but it doesn't work.</p>
  
  <p>This are the contents of <code>tests\AlliancesObjectTest</code></p>
  
  <pre><code>&lt;?php
  
  use \phpunit\framework\TestCase;
  
  class AlliancesObjectTest extends TestCase
  {
      /** @test */
      public function testPushAndPop()
      {
          $stack = [];
          $this-&gt;assertEquals(0, count($stack));
  
          array_push($stack, 'foo');
          $this-&gt;assertEquals('foo', $stack[count($stack)-1]);
          $this-&gt;assertEquals(1, count($stack));
  
          $this-&gt;assertEquals('foo', array_pop($stack));
          $this-&gt;assertEquals(0, count($stack));
      }
  }
  </code></pre>
  
  <p>Contents of <code>phpunit.xml</code></p>
  
  <pre><code>&lt;phpunit bootstrap="./tests/phpunit.php"&gt;
  
      &lt;testsuite name="unit"&gt;
          &lt;directory&gt;./tests&lt;/directory&gt;
      &lt;/testsuite&gt;
  
      &lt;filter&gt;
          &lt;whitelist&gt;
              &lt;directory&gt;./src&lt;/directory&gt;
          &lt;/whitelist&gt;
      &lt;/filter&gt;
  
      &lt;logging&gt;
          &lt;log type="coverage-clover" target="build/logs/clover.xml"/&gt;
      &lt;/logging&gt;
  
  &lt;/phpunit&gt;
  </code></pre>
  
  <p>contents of <code>tests\phpunit.php</code></p>
  
  <pre><code>&lt;?php
  require_once __DIR__ . '/../vendor/autoload.php';
  </code></pre>
  
  <p>Full response in terminal:</p>
  
  <pre><code>vagrant@homestead:~/xxxxxxx$ phpunit -v
  PHPUnit 5.4.2 by Sebastian Bergmann and contributors.
  
  Runtime:       PHP 7.0.2-4+deb.sury.org~trusty+1 with Xdebug 2.4.0RC3
  Configuration: /home/vagrant/xxxxxxx/phpunit.xml
  
  W                                                        1 / 1 (100%)
  
  Time: 225 ms, Memory: 4.00MB
  
  There was 1 warning:
  
  1) Warning
  No tests found in class "AlliancesObjectTest".
  
  WARNINGS!
  Tests: 1, Assertions: 0, Warnings: 1.
  
  Generating code coverage report in Clover XML format ... done
  </code></pre>