php artisan test无法切换数据库连接至mysql_test的问题求助

大家好，我碰到一个挺头疼的问题：在PhpStorm里运行测试的时候，一切都正常，数据库连接会自动切换到mysql_test；但我手动在终端执行php artisan test命令时，数据库连接根本不会切换，一直用的是默认的mysql连接。

下面是我的phpunit.xml配置文件内容：

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

<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:noNamespaceSchemaLocation="./vendor/phpunit/phpunit/phpunit.xsd"

bootstrap="vendor/autoload.php"

colors="true"

>

<testsuites>

<testsuite name="Unit">

<directory suffix="Test.php">./Modules/**/Tests/Unit</directory>

</testsuite>

<testsuite name="Feature">

<directory suffix="Test.php">./Modules/**/Tests/Feature</directory>

</testsuite>

</testsuites>

<php>

<env name="APP_ENV" value="testing"/>

<env name="BCRYPT_ROUNDS" value="4"/>

<env name="CACHE_DRIVER" value="array"/>

<env name="DB_CONNECTION" value="mysql_test"/>

<env name="DB_CONNECTION" value="mysql_test"/>

<env name="MAIL_MAILER" value="array"/>

<env name="QUEUE_DRIVER" value="sync"/>

<env name="QUEUE_CONNECTION" value="sync"/>

<env name="SESSION_DRIVER" value="array"/>

<env name="TELESCOPE_ENABLED" value="false"/>

</php>

<source>

<include>

<directory suffix=".php">./app</directory>

<directory suffix=".php">./Modules</directory>

</include>

</source>

</phpunit>

这是其中一个测试文件的代码：

class BannerTest extends TestCase
{

use WithFaker;

private static $authUser;

public function setUp(): void
{
// first include all the normal setUp operations
parent::setUp();

self::$authUser = Operator::factory()->create();

$this->app->make(\Spatie\Permission\PermissionRegistrar::class)->registerPermissions();
}

public function giveBannerPermission()
{
$operator = self::$authUser;
$this->be(self::$authUser);
$operator->assignRole('admin');
$role = Role::findByName('admin');
$role->givePermissionTo('bannerAdd');
}

public function banner_requires_status()
{
$this->giveBannerPermission();
$banner = Banner::factory()->raw(['title' => NULL]);
$this->post(route('banner.store'), $banner)->assertSessionHasErrors('title');
}

}

我已经试过在运行测试前执行php artisan optimize:clear和php artisan cache:clear，但问题还是没解决，有没有朋友遇到过类似的情况，能给点思路吗？

备注：内容来源于stack exchange，提问作者arya_la