       expect(decorationsWrapperNode.style.backgroundColor).not.toBe ''
 
     it "creates a new DOM node for a new decoration and adds it to the gutter at the right place", ->
-      customDecorations = 'test-gutter':
+      customDecorations =
         'decoration-id-1':
           top: 0
           height: 10

      expect(decorationItem).toBe decorationItem2

      # Remove the item, add a class.
      changedCustomDecorations = 'test-gutter':
        'decoration-id-1':
          top: 10
          height: 20


    buildTestState = (customDecorations) ->
      mockTestState =
        content: if customDecorations then customDecorations else {}
        styles:
          scrollHeight: 100
          scrollTop: 10
          backgroundColor: 'black'

      mockTestState

    it "sets the custom-decoration wrapper's scrollHeight, scrollTop, and background color", ->
