Is there a way create a service object of an NUnit test class to use dependency injection when connecting it to a console app?

Question

I have an NUnit3 project and a console app project in .NET 5 and would like to be able to use dependency injection for a class in my NUnit project. In the console app I am creating the HostBuilder to configure the services for the dependency injection, but in the Main method when I am trying to get the service object of my test class it is returning null. I am not too familiar with DI other than a couple small ASP.NET projects I've done so I don't know if I am doing this right exactly or if this is something that can be done. Any help would be greatly appreciated.

namespace SeleniumTest
{
    public interface IDriverHelper
    {
        public AndroidDriver<AndroidElement> Driver { get; }
    }
}

namespace SeleniumTest
{
    public class DriverHelper : IDriverHelper
    {

        private AndroidDriver<AndroidElement> driver;
        private AppiumLocalService appiumLocalService;
        private AppiumOptions appiumOptions;

        public AndroidDriver<AndroidElement> Driver
        {
            get => driver;
            set
            {
                appiumLocalService = new AppiumServiceBuilder().UsingAnyFreePort().Build();
                appiumLocalService.Start();

                appiumOptions = new AppiumOptions();
                // options added here

                driver = new AndroidDriver<AndroidElement>(appiumLocalService, appiumOptions);
            }
        }
    }
}

Here is the beginning of the Test Class

namespace SeleniumTest
{
    [TestFixture]
    public class Tests
    {
        private readonly IDriverHelper _driverHelper;

        public MyMerlin(IDriverHelper driverHelper)
        {
            _driverHelper = driverHelper;
        }

In the code below, var test = host.Services.GetService<Tests>(); returns null so I am unable to run any of the tests in that class, ex: test.PreSetupTest();

public class Program
    {
        static Task Main(string[] args)
        {
            Console.WriteLine("Hello World!");

            using IHost host = CreateHostBuilder(args).Build();

            var test = host.Services.GetService<Tests>();
            test.PreSetupTest();

            return host.RunAsync();
        }
        static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureServices((_, services) =>
                    services.AddSingleton<IDriverHelper, DriverHelper>());
    }