Zend Test - "Test code or tested code did not (only) close its own output buffers" is thrown about errorheromodule HOT 6 CLOSED

    public function setUp()
    {
        // The module configuration should still be applicable for tests.
        // You can override configuration here with test case specific values,
        // such as sample view templates, path stacks, module_listener_options,
        // etc.
        $configOverrides = [];

        $appConfig = include __DIR__ . '/../../../../config/application.config.php';
        $appConfig['modules'] = \array_filter($appConfig['modules'], function($v, $k) {
            return $v !== 'ErrorHeroModule';
        }, ARRAY_FILTER_USE_BOTH);

        $this->setApplicationConfig(ArrayUtils::merge(
            $appConfig,
            $configOverrides
        ));

        parent::setUp();
    }

    public function setUp()
    {
        \ob_get_flush();

        // The module configuration should still be applicable for tests.
        // You can override configuration here with test case specific values,
        // such as sample view templates, path stacks, module_listener_options,
        // etc.
        $configOverrides = [];

        $this->setApplicationConfig(ArrayUtils::merge(
            include __DIR__ . '/../../../../config/application.config.php',
            $configOverrides
        ));

        parent::setUp();
    }