PHPStorm - Process finished with exit code 255

Question

I'm trying to make unit tests in Symfony 3 framework. Here are my configurations;

and here is the error that I'm facing.

/Applications/MAMP/bin/php/php7.0.0/bin/php /private/var/folders/w9/cmwlplqx53x3slxkm4c1chx00000gn/T/ide-phpunit.php --bootstrap /Users/muhammetergenc/code/kampweb/phpunit.xml.dist --configuration /Users/muhammetergenc/code/kampweb/phpunit.xml.dist Tests\AppBundle\Controller\PersonTest /Users/muhammetergenc/code/kampweb/tests/AppBundle/Controller/PersonTest.php
Testing started at 3:04 PM ...
<?xml version="1.0" encoding="UTF-8"?>

<!-- http://phpunit.de/manual/4.1/en/appendixes.configuration.html -->
<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/4.1/phpunit.xsd"
         backupGlobals="false"
         colors="true"
         bootstrap="app/autoload.php">

    <!-- <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/4.1/phpunit.xsd"
             backupGlobals="false"
             colors="true"
             bootstrap="web/app_test.php">-->
    <php>
        <ini name="error_reporting" value="-1" />
        <server name="KERNEL_DIR" value="app/" />
    </php>

    <testsuites>
        <testsuite name="Project Test Suite">
            <directory>tests</directory>
        </testsuite>
    </testsuites>

    <filter>
        <whitelist>
            <directory>src</directory>
            <exclude>
                <directory>src/*Bundle/Resources</directory>
                <directory>src/*/*Bundle/Resources</directory>
                <directory>src/*/Bundle/*Bundle/Resources</directory>
            </exclude>
        </whitelist>
    </filter>
</phpunit>

Process finished with exit code 255

I do have the same configuration on my other desktop and it works just fine.

Solution

Today I had the same error - 255. in my case I hadn't declared CONSTANTS in the setUp method.

I think that you have something similar. Try to find it by using xdebug - it helped me out.