Testing successful seed with minitest / rspec

I'm trying to test if a seed is successfully run. I currently have the following:

require 'test_helper'

class SeedsTest < ActiveSupport::TestCase
  test 'it should successfully run the seeds' do
    load Rails.root.join('db/seeds.rb')
  end
end

However the load expression simply returns true and does not invoke the seed. Is there a way to do this?