anchor.diff:          if not (String.IsNullOrEmpty AppVeyorEnvironment.JobId) then UploadTestResultsFile Xunit (testDir @@ "test.xml")
   
       // test with opencover and publish result to coveralls.io
  -    let coverSolution solution = 
  +    let coverSolutionWithParams setParams solution = 
           ensureDirectory testDir
           solution.Projects
           |> List.map 
  -               (fun project -> (project.Folder + ".Tests") @@ "bin" @@ solution.Configuration @@ (Path.GetFileName(project.Folder) + ".Tests.dll"))
  +               (fun project -> 
  +               (project.Folder + ".Tests") 
  +               @@ "bin" @@ solution.Configuration @@ (Path.GetFileName(project.Folder) + ".Tests.dll"))
           |> List.filter (fun path -> File.Exists(path))
           |> String.concat " "
  -        |> (fun dlls -> 
  -        OpenCover (fun p -> 
  -            { p with ExePath = openCoverExe.Force()
  -                     TestRunnerExePath = xunitRunnerExe.Force()
  -                     Output = testDir @@ "coverage.xml"
  -                     Register = RegisterUser
  -                     Filter = "+[*]* -[*.Tests]* -[xunit*]*" }) (dlls + " -noshadow"))
  +        |> (fun dlls ->
  +            OpenCover (fun p ->
  +                setParams { p with ExePath = openCoverExe.Force()
  +                                   TestRunnerExePath = xunitRunnerExe.Force()
  +                                   Output = testDir @@ "coverage.xml"
  +                                   Register = RegisterUser
  +                                   Filter = "+[*]* -[*.Tests]* -[xunit*]*" }) (dlls + " -noshadow"))
           if getBuildParam "coverallskey" <> "" then 
               // disable printing args to keep coverallskey secret
               ProcessHelper.enableProcessTracing <- false
  
positive.code:                     info.Arguments <- testDir @@ "coverage.xml" + " -r " + (getBuildParam "coverallskey")) TimeSpan.MaxValue
              if result <> 0 then failwithf "Failed to upload coverage data to coveralls.io"
              ProcessHelper.enableProcessTracing <- true
  
      let coveritySolution solution projectId =
          // info
  
negative.code: namespace BuildLib
  
  open Fake.OpenCoverHelper
  
  [<AutoOpen>]
  module Test =
  