Codeception separate processes issue

Output

There was 1 error:

---------
1) SeparateProcessTest::testMe
PHPUnit_Framework_Exception: PHP Fatal error:  Call to a member function run() on a non-object in /home/etki/Workspace/PHP/environment/vendor/codeception/codeception/src/Codeception/TestCase/Test.php on line 30
PHP Stack trace:
PHP   1. {main}() -:0
PHP   2. __phpunit_run_isolated_test() -:626
PHP   3. PHPUnit_Framework_TestCase->run() -:369
PHP   4. PHPUnit_Framework_TestResult->run() /home/etki/Workspace/PHP/environment/vendor/phpunit/phpunit/src/Framework/TestCase.php:711
PHP   5. PHPUnit_Framework_TestCase->runBare() /home/etki/Workspace/PHP/environment/vendor/phpunit/phpunit/src/Framework/TestResult.php:643
PHP   6. Codeception\TestCase\Test->setUp() /home/etki/Workspace/PHP/environment/vendor/phpunit/phpunit/src/Framework/TestCase.php:771

Fatal error: Call to a member function run() on a non-object in /home/etki/Workspace/PHP/environment/vendor/codeception/codeception/src/Codeception/TestCase/Test.php on line 30

Call Stack:
    0.0021     476256   1. {main}() -:0
    0.0853    7727224   2. __phpunit_run_isolated_test() -:626
    0.0867    7886616   3. PHPUnit_Framework_TestCase->run() -:369
    0.0890    8083560   4. PHPUnit_Framework_TestResult->run() /home/etki/Workspace/PHP/environment/vendor/phpunit/phpunit/src/Framework/TestCase.php:711
    0.0919    8170464   5. PHPUnit_Framework_TestCase->runBare() /home/etki/Workspace/PHP/environment/vendor/phpunit/phpunit/src/Framework/TestResult.php:643
    0.0945    8191208   6. Codeception\TestCase\Test->setUp() /home/etki/Workspace/PHP/environment/vendor/phpunit/phpunit/src/Framework/TestCase.php:771

SeparateProcessTest.php

<?php

/**
 * @runTestsInSeparateProcesses
 */
class SeparateProcessTest extends \Codeception\TestCase\Test
{
    public function testMe() {}
}