Invalid Mongo Server URI Port

[artahc]

func TestMain(m *testing.M) {
	opts := &memongo.Options{
		MongoVersion:   "7.0.2",
		MongodBin:      "/opt/homebrew/bin/mongod",
		Logger:         log.Default(),
		LogLevel:       2,
		Port:           27018,
		StartupTimeout: time.Second * 30,
	}
	if runtime.GOARCH == "arm64" {
		if runtime.GOOS == "darwin" {
			opts.DownloadURL = fmt.Sprintf("https://fastdl.mongodb.org/osx/mongodb-macos-x86_64-%s.tgz", MONGODB_VERSION)
		}
	}

	mongoServer, err := memongo.StartWithOptions(opts)
	if err != nil {
		log.Fatal(err)
	}
	defer mongoServer.Stop()

	os.Exit(m.Run())
}

mongoServer.URI always returns mongodb://localhost:0 instead of given port number

Edit:
I'm using the latest commit b8467444e40c09e725bd81372d236a5a948694f2 because of removal ephemeralForTest on mongodb version which I'm using

[artahc]

Uh, actually I was wrong.
I was trying to initialize memongo.Server to global variable to be shared between test, but this line right here, doesn't really assign it my global variable,

mongoServer, err := memongo.StartWithOptions(opts)

so my global variable is actually empty, thus the port returns an empty value (0).