Codeception REST API call for HTTPS url - rest

Question

I'm looking for a codeception configuration to use the Codeception REST Module to make calls against a secured https url.
For example I want to check the online status of our slack bot:
$slackApiUrl = 'https://slack.com/api/users.getPresence';
$params = [
'token' => $apiToken,
'user' => $botUserId,
];
$I->sendPOST($slackApiUrl, $params);
When I execute the test, I'll get a guzzle error like
[GuzzleHttp\Exception\ConnectException] cURL error 35: SSL: CA certificate set, but certificate verification is disabled (see http://curl.haxx.se/libcurl/c/libcurl-errors.html)
I knew, that the default of codeception switch off https secured urls but how can I activate https, when I need it?
My suite.yml:
class_name: AcceptanceTester
modules:
enabled:
- REST:
url: *****
depends: PhpBrowser
- PhpBrowser
- Asserts
- \Helper\Acceptance

Answer 1

I could answer myself. It`s the codeception version. After updating to Codeception v2.2, the same test works like expected.
Codeception PHP Testing Framework v2.2.8
Powered by PHPUnit 5.7.15 by Sebastian Bergmann and contributors.
[Groups] slack
Acceptance (live) Tests (1) --------------------------------------------------------------------------
Modules: REST, PhpBrowser, Asserts, \Helper\Acceptance
------------------------------------------------------------------------------------------------------
slackCest: Check slack bot online status
I send post "https://slack.com/api/users.getPresence"
[...]
[Response] {"ok":true,"presence":"active"}
I am going to Check SlackBot online status
I see response contains json {"ok":true,"presence":"active"}
PASSED