Why is the class not connected to the test through use?

Question

Yii

Good afternoon!
Codeception is installed globally.
If in the test we connect the class via

require '/var/www/admin/www/project/common/models/Country.php';

then the test passes.
If through

namespace frontend\tests\unit;
use common\models\Country;

then an error is thrown

MePHP Fatal error:  Class 'common\models\Country' not found in /var/www/admin/www/project/frontend/tests/unit/ModelTest.php on line 29
PHP Stack trace:
PHP   1. {main}() /root/.composer/vendor/codeception/codeception/codecept:0

I suspect that the problem is that codeception is running globally, but how to set it up correctly?
Thank you.

Answer 1

stackoverflow.com/questions/29681347/namespaces-no...
is it?