void Start(ProcessStartInfo processStartInfo)
        {
            LogCommandLine(processStartInfo);

            if (ApplicationFileNameExists(processStartInfo.FileName))
            {
                testResultsReader.Start();
                processRunner.WorkingDirectory = DirectoryName.Create(processStartInfo.WorkingDirectory);
                processRunner.RedirectStandardOutputAndErrorToSingleStream = true;
                processRunner.StartCommandLine("\"" + processStartInfo.FileName + "\" " + processStartInfo.Arguments);
                Task.WhenAll(
                    processRunner.OpenStandardOutputReader().CopyToAsync(output),
                    processRunner.WaitForExitAsync()).ContinueWith(_ => OnAllTestsFinished()).FireAndForget();
            }
            else
            {
                ShowApplicationDoesNotExistMessage(processStartInfo.FileName);
            }
        }