TYPO3 Core

I'm defining some concrete classes for interfaces in my extension by TypoScript, and since I don't want to interfere with other extensions, I'm doing it within 'plugin' section:

plugin.tx_myext {
    objects {
        Vendor\MyExt\Service\MyServiceInterface {
            className = Vendor\MyExt\Service\RestMyService
        }
        Psr\Http\Message\RequestInterface {
            className = GuzzleHttp\Psr7\Request
        }
    }
}

That works fine in FE mode, but doesn't work in CLI mode.

And, yes, I've added following line to my TS:

module.tx_myext < plugin.tx_myext

When I'm defining my overloads globally via config.tx_extbase, then it works fine, but this is not my initially desired result.