I went through the
Test Account Setup doc and created a test account with
this URL and also
this one. I could not get the new test account linked to my production AdWords account. I called AdWords customer support and they said the ability to link test accounts to production MCC accounts was disabled in 7/2015.
Without linking the test and production account I can't use the developer token to generate test access tokens.
How do I generate a developer token for a test account that is not linked to a production account?