Can I test accounts linking using test account?

I followed the guide https://developers.google.com/adwords/api/docs/test-accounts

But I can not find if it's possible to test linking of accounts.

My application has the possiblity to invite customers to link to my MCC account. I would like to be able to test that flow.

In the guide it's written that I can use only Production Manager developer token, when I'm trying to link using this token I'm receiving an error: ManagedCustomerServiceError.TEST_ACCOUNT_LINK_ERROR

also from the guide:

Important: You cannot link test manager or AdWords accounts to production manager accounts, or vice versa.

That means I can not test my functionality without creating real account with active campaign and billing address ?

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