File: config/phpunit.xml

<?xml version="1.0" encoding="UTF-8"?>

<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/6.5/phpunit.xsd"
         bootstrap="../vendor/autoload.php"
         forceCoversAnnotation="true"
         beStrictAboutCoversAnnotation="true"
         beStrictAboutOutputDuringTests="true"
         beStrictAboutTodoAnnotatedTests="true"
         colors="true"
         stopOnFailure="true">

  <testsuite name="default">
    <directory>../tests/phpunit</directory>
  </testsuite>

  <filter>
    <whitelist processUncoveredFilesFromWhitelist="true">
      <directory suffix=".php">../src</directory>
    </whitelist>
  </filter>

  <logging>
    <log type="coverage-text" target="php://stdout" showUncoveredFiles="true"/>
    <log type="coverage-clover" target="../resources/coverage/clover.xml"/>
    <log type="coverage-html" target="../resources/coverage-html/"/>
  </logging>

</phpunit>