Integration tests api in .net6.0 - api

Question

SO when I did integration tests for api's, I used tio have a xunit project and used Microsoft.AspNetcore.Mvc.Testing.
There I used a WebApplicationFactory<namespace.Startup>().
According to microsoft docs they provide roughly the same:
// Arrange
_server = new TestServer(new WebHostBuilder()
.UseStartup<Startup>());
_client = _server.CreateClient();
found here: api integration tests
However since .net6.0 came out when creating an api project and other projects aswell, they don't seem to have a startup class anymore, all is embedded in the program.cs file, But program.cs file doesn't contain a class either, so i'm a little bit stuck on what to use in my webapplicationfactory<namesapce.startup> -> since there is no startup anymore
Any idea what to do here?
Edit:
program.cs of my api (with controllers)
var builder = WebApplication.CreateBuilder(args);
// Add services to the container.
builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
var app = builder.Build();
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
app.UseSwagger();
app.UseSwaggerUI();
}
app.UseHttpsRedirection();
app.UseAuthorization();
app.MapControllers();
app.Run();
public partial class Program { }
my tests:
public class ApiTests
{
private readonly HttpClient client;
private readonly TestServer _server;
private const string url = "https://localhost/api/network";
public ApiTests()
{
_server = new TestServer(WebApplicationFactory<Network_Monitor_Agent.Program>);
}
[Fact]
public async Task GetRequest_Should_Return_Success_Information()
{
var response = await client.GetAsync(url);
Assert.Equal(HttpStatusCode.OK, response.StatusCode);
}
}