How to POST with missing authenticity_token in rspec rails request test?

I'm simulating a request coming from an external service, which will not have an authenticity token. I want the test to fail if skip_before_action :verify_authenticity_token is missing. How do I do this from an Rspec request spec? Currently I'm using post as below, but it is happily accepted. post endpoint, my_json_string, {'CONTENT_TYPE' => "application/json"}

[key_amb]

Rails でテスト時に CSRF チェックはデフォルト無効になるが、有効にしたいときは ActionController::Base.allow_forgery_protection = true で。

[progrhyme]

Rails でテスト時に CSRF チェックはデフォルト無効になるが、有効にしたいときは ActionController::Base.allow_forgery_protection = true で。