Rails/Rspec JSON integers being converted to strings when testing post call

In Rails 5, use as: :json instead of format: :json, e.g. post :consider, params: automatic_approve_params, as: :json

After replicating the issue you are having I managed to resolve it in a controller spec using the following:

post :consider, automatic_approve_params.merge(format: :json)

In my local tests I removed the request.env["HTTP_ACCEPT"] = 'application/json' and it still worked as you expect it to. Hope it helps.