(function() {
  "use strict";

  describe("<%= pluginFullName %>", function() {

    var slides, deck,

      createDeck = function() {
        slides = [];

        var parent = document.createElement('article');
        for (var i = 0; i < 10; i++) {
          slides.push(document.createElement('section'));
          parent.appendChild(slides[i]);
        }

        deck = bespoke.from(parent, {
          myplugin: true
        });
      };

    beforeEach(createDeck);

    describe("when a slide is activated", function() {

      beforeEach(function() {
        deck.slide(0);
      });

      it("should not a useless 'foobar' class to the slide", function() {
        expect(slides[0].classList.contains('foobar')).toBe(false);
      });

    });

  });

}());

(function() {
  'use strict';

  describe("<%= pluginFullName %>", function() {

    var slides, deck,

      createDeck = function() {
        slides = [];

        var parent = document.createElement('article');
        for (var i = 0; i < 10; i++) {
          slides.push(document.createElement('section'));
          parent.appendChild(slides[i]);
        }

        deck = bespoke.from(parent, {
          myplugin: true
        });
      };

    beforeEach(createDeck);

    describe("when a slide is activated", function() {

      beforeEach(function() {
        deck.slide(0);
      });

      it("should not a useless 'foobar' class to the slide", function() {
        expect(slides[0].classList.contains('foobar')).toBe(false);
      });

    });

  });

}());

Use single quotes in test for everything except descriptions
Use single quotes in test for everything except descriptions
