anchor.diff:        Run : string list
         /// Doesn't run tests, print out list of tests instead.
         ListTests : bool
  +      /// Custom arguments to use in the case the helper not yet supports them
  +      CustomArgs: string list
         /// Working directory
         WorkingDirectory : string
       }
  +
       override this.ToString() =
           let append (s: string) (sb: StringBuilder) = sb.Append s
           let appendIfTrue p s sb =
  
positive.code:         failedAssemblies
          |> List.map (fun (testAssembly,exitCode) -> sprintf "Expecto test of assembly '%s' failed. Process finished with exit code %d." testAssembly exitCode)
          |> String.concat System.Environment.NewLine
          |> FailedTestsException |> raise
negative.code:             Run = []
              ListTests = false
              Summary = true
              CustomArgs = []
              WorkingDirectory = ""
          }
  
  