How to override mass-assignment protection globally in specs

model_spec.rb

class TestSanitizer < ActiveModel::MassAssignmentSecurity::Sanitizer
  def sanitize(klass, attributes, authorizer)
    attributes
  end
end

ActiveRecord::Base.mass_assignment_sanitizer = TestSanitizer.new

it "creates a model" do
  Model.should_receive(:create).with(:name => "Foo Bar")
  Model.create(:name => "Foo Bar")
end