hange', function() {
          ajax = fixture('ParamsGet');
          request = ajax.generateRequest();

          expect(request.xhr.url).to.be.equal('/responds_to_get_with_json?a=a');

          ajax.params = {b: 'b'};
          request = ajax.generateRequest();

          expect(request.xhr.url).to.be.equal('/responds_to_get_with_json?b=b');
        });
      });

      suite('when `auto` is enabled', function() {
        setup(function() {
          ajax = fixture('AutoGet');
        });

        test('