Fix zen mode spec

spec/javascripts/zen_mode_spec.js

@@ -2,6 +2,7 @@ import $ from 'jquery';
 import Dropzone from 'dropzone';
 import Mousetrap from 'mousetrap';
 import ZenMode from '~/zen_mode';
+import initNotes from '~/init_notes';
 
 describe('ZenMode', () => {
   let zen;
@@ -28,6 +29,7 @@ describe('ZenMode', () => {
 
   beforeEach(() => {
     loadFixtures(fixtureName);
+    initNotes();
 
     dropzoneForElementSpy = spyOn(Dropzone, 'forElement').and.callFake(() => ({
       enable: () => true,

spec/support/helpers/javascript_fixtures_helpers.rb

@@ -69,7 +69,7 @@ module JavaScriptFixturesHelpers
       link_tags = doc.css('link')
       link_tags.remove
 
-      scripts = doc.css("script:not([type='text/template']):not([type='text/x-template'])")
+      scripts = doc.css("script:not([type='text/template']):not([type='text/x-template']):not([type='application/json'])")
       scripts.remove
 
       fixture = doc.to_html