       expect(changedDecorationNode.children.length).toBe 0
 
     it "removes any decorations that existed previously but aren't in the latest update", ->
-      customDecorations = 'test-gutter':
+      customDecorations =
         'decoration-id-1':
           top: 0
           height: 10

      decorationsWrapperNode = gutterComponent.getDomNode().children.item(0)
      expect(decorationsWrapperNode.children.length).toBe 1

      emptyCustomDecorations = 'test-gutter': {}
      gutterComponent.updateSync(buildTestState(emptyCustomDecorations))
      expect(decorationsWrapperNode.children.length).toBe 0


      # Change the dimensions and item, remove the class.
      decorationItem2 = document.createElement('div')
      changedCustomDecorations =
        'decoration-id-1':
          top: 10
          height: 20
