How to make friends Yii2 and Codeception with coverage?

Question

Yii

Good afternoon. There was a need to cover your REST API with tests, and at the same time see the code coverage with these tests. I kind of figured out how to write a simple test with a REST call, but --coverage-htmlit doesn’t work out with stubbornness!
I'm using Yii2-basic as a base, installed all required dependencies. I have Codecept globally from composer (installed in include_path).
It is not clear to me how c3.php works and how to connect it to the project so that it starts working adequately.
Here are my configs:
tests/codeception.yml

actor: Tester
paths:
    tests: codeception
    log: codeception/_output
    data: codeception/_data
    helpers: codeception/_support
settings:
    bootstrap: _bootstrap.php
    suite_class: \PHPUnit_Framework_TestSuite
    memory_limit: 1024M
    log: true
    colors: true
config:
    test_entry_url: 'http://site.local/index-test.php'

acceptance.suite.yml

class_name: AcceptanceTester
modules:
    enabled:
        - PhpBrowser
        - REST
    config:
        PhpBrowser:
            url: http://site.local

coverage:
  enabled: true
  remote: true
  c3_url: 'http://site.local/index-test.php'

I leave tests from acceptance as they are.
web/c3.php

// include composer vendor
include 'vendor/autoload.php';

$_SERVER['HTTP_X_CODECEPTION_CODECOVERAGE_DEBUG'] = 1;
$_SERVER['HTTP_X_CODECEPTION_CODECOVERAGE_CONFIG'] = '/../tests/codeception.yml';

I don't connect to index-test.php from 3.php....
nginx settings

location /c3/ {
    try_files /c3.php?$args /c3.php;
  }

  location / {
    try_files $uri $uri/ /index.php?$args;
  }

As a result, my tests are running, but the report in html is empty. Maybe I'm doing something fundamentally wrong???