       mockTestState
 
     it "sets the custom-decoration wrapper's scrollHeight, scrollTop, and background color", ->
-      decorationsWrapperNode = customGutterComponent.getDomNode().children.item(0)
+      decorationsWrapperNode = gutterComponent.getDomNode().children.item(0)
       expect(decorationsWrapperNode.style.height).toBe ''
       expect(decorationsWrapperNode.style['-webkit-transform']).toBe ''
       expect(decorationsWrapperNode.style.backgroundColor).toBe ''
 
-      customGutterComponent.updateSync(buildTestState({}))
+      gutterComponent.updateSync(buildTestState({}))
       expect(decorationsWrapperNode.style.height).not.toBe ''
       expect(decorationsWrapperNode.style['-webkit-transform']).not.toBe ''
       expect(decorationsWrapperNode.style.backgroundColor).not.toBe ''

          item: decorationItem1
          class: 'test-class-1'

      customGutterComponent.updateSync(buildTestState(customDecorations))
      decorationsWrapperNode = customGutterComponent.getDomNode().children.item(0)
      expect(decorationsWrapperNode.children.length).toBe 1

      decorationNode = decorationsWrapperNode.children.item(0)

          height: 10
          item: decorationItem1
          class: 'test-class-1'
      gutterComponent.updateSync(buildTestState(initialCustomDecorations))
      initialDecorationNode = gutterComponent.getDomNode().children.item(0).children.item(0)

      # Change the dimensions and item, remove the class.
      decorationItem2 = document.createElement('div')
