As described in https://github.com/electron/electron/pull/13769, we had to disable mixed sandbox related tests for Windows CI. We should re-enable them back after finding out the root reason.
atom/app/atom_main_delegate.cc
AtomMainDelegate::~AtomMainDelegate() {}
bool AtomMainDelegate::BasicStartupComplete(int* exit_code) {
  auto* command_line = base::CommandLine::ForCurrentProcess();
  logging::LoggingSettings settings;
#if defined(OS_WIN)
  
  
  if (IsBrowserProcess(command_line))
    std::wcout << std::endl;
#if defined(DEBUG)
  
  settings.logging_dest = logging::LOG_TO_ALL;
  settings.log_file = L"debug.log";
  settings.lock_log = logging::LOCK_LOG_FILE;
  settings.delete_old = logging::DELETE_OLD_LOG_FILE;
#else
  settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
#endif  
#else   
  settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
#endif  
  
  auto env = base::Environment::Create();
  if (!command_line->HasSwitch(::switches::kEnableLogging) &&
      !env->HasVar("ELECTRON_ENABLE_LOGGING")) {