         chai.expect(c.network).not.to.be.null
         c.network.loader.components.Split = Split
         c.network.loader.components.Merge = SubgraphMerge
-        c.start()
+        c.start (err) ->
+          done err if err
       g.send
         exports: [
           public: 'in'

        chai.expect(c.network).not.to.be.null
        c.network.loader.components.Split = Split
        c.network.loader.components.Merge = SubgraphMerge
        c.start()
      g.send file
      chai.expect(c.ready).to.be.false
    it 'should expose available ports', (done) ->

        chai.expect(c.network).not.to.be.null
        c.network.loader.components.Split = Split
        c.network.loader.components.Merge = SubgraphMerge
        c.start (err) ->
          done err if err
      g.send
        processes:
          Split:
