ZZCX_yii/environments/dev/frontend/config/test-local.php

<?php
return yii\helpers\ArrayHelper::merge(
    require(__DIR__ . '/../../common/config/test-local.php'),
    require(__DIR__ . '/main.php'),
    require(__DIR__ . '/main-local.php'),
    require(__DIR__ . '/test.php'),
    [
    ]
);