anchor.diff:  
       
       """
  -    File.WriteAllText(fileName1, fileSource1)
  -
  -    let fileNames = [fileName1]
  -    let args = mkProjectCommandLineArgs (dllName, fileNames)
  -    let options =  exprChecker.GetProjectOptionsFromCommandLineArgs (projFileName, args)
  -
  -
  -[<Test>]
  +
  +
  +    let createOptions() =
  +        let temp1 = Utils.getTempFileName()
  +        let temp2 = Utils.getTempFileName()
  +        let fileName1 = Utils.getTempFilePathChangeExt temp1 ".fs" //Path.ChangeExtension(Path.GetTempFileName(), ".fs")
  +        let dllName = Utils.getTempFilePathChangeExt temp2 ".dll" //Path.ChangeExtension(base2, ".dll")
  +        let projFileName = Utils.getTempFilePathChangeExt temp2 ".fsproj" //Path.ChangeExtension(base2, ".fsproj")
  +
  +        Utils.createTempDir()
  +        File.WriteAllText(fileName1, fileSource1)
  +
  +        let fileNames = [fileName1]
  +        let args = mkProjectCommandLineArgs (dllName, fileNames)
  +        let options =  exprChecker.GetProjectOptionsFromCommandLineArgs (projFileName, args)
  +        
  +        [fileName1; dllName; projFileName], options
  +
  +    let options = lazy createOptions()
  +
  +
  +/// This test is run in unison with its optimized counterpart below
   let ``Test expressions of declarations stress big expressions`` () =
  -    let wholeProjectResults = exprChecker.ParseAndCheckProject(ProjectStressBigExpressions.options) |> Async.RunSynchronously
  +    let wholeProjectResults = exprChecker.ParseAndCheckProject(snd ProjectStressBigExpressions.options.Value) |> Async.RunSynchronously
       
       wholeProjectResults.Errors.Length |> shouldEqual 0
   
  
positive.code: let testMutableConst = mutableConst ()
      """
  
      File.WriteAllText(fileName2, fileSource2)
  
      let fileNames = [fileName1; fileName2]
      let args = mkProjectCommandLineArgs (dllName, fileNames)
      let options =  checker.GetProjectOptionsFromCommandLineArgs (projFileName, args)
  
      let operatorTests = """
  module OperatorTests{0}
  
negative.code: 
  module internal ProjectStressBigExpressions = 
  
      let fileSource1 = """
  module StressBigExpressions 
  
  