t.Fatal(err)
	}
	f, err := os.Open(exe)
	if err != nil {
		t.Fatal(err)
	}
	defer f.Close()

	err = checkFileIsNotPartOfNetpoll(f)
	if err != nil {
		t.Fatal(err)
	}
}

func TestSerialFdsAreInitialised(t *testing.T) {
	for _, name := range []string{"COM1", "COM2", "COM3", "COM4"} {
		t.Run(name, func(t *testing.T) {
			h, err := syscall.CreateFile(syscall.StringToUTF16Ptr(name),