     beforeEach (done) ->
       promises = [
         q.nfcall(
-          fs.readFile.bind fs.readFile,
+          fs.readFile,
           "./tests/data/imports/main.css"
         ).then(
           (data) -> right.content = removeMapFile(

          promises = []
          files.forEach (file) ->
            promises.push q.nfcall(
              fs.readFile.bind fs.readFile, file
            ).then(
              (data) ->
                expect(

                ).equal right[resultPath].content
            )
            promises.push q.nfcall(
              fs.readFile,
              resultPath + ".map"
            ).then(
              (map) ->
