Xunit Serialize/Deserialize Custom Type

Question

I'm trying to serialize / deserialize a unique type as part of an xunit c# test. The type is

List<GraphicTestCase<TPage>> _testCases = new();

GraphicTestCase looks like the following:

public interface IGraphicTestCase
{
    string Name { get; set; }
    IWebElement Execute();
}

public abstract class GraphicTestBase<TPage,TReturn> where TPage : BasePage
{
    private readonly Func<TPage> _pageFactory;
    public GraphicTestBase(Func<TPage> pageFactory)
    {
        _pageFactory = pageFactory;
    }

    public string Name { get; set; }
    public Func<TPage, TReturn> Action { get; set; }

    public TReturn Execute()
    {
        TPage page = _pageFactory();
        return Action(page);
    }
}

public class GraphicTestCase<TPage> : GraphicTestBase<TPage, IWebElement> , IGraphicTestCase where TPage : BasePage
{
    public GraphicTestCase(Func<TPage> pageFactory) : base(pageFactory)
    {
    }
}

Here is my current serialization/deserialization

    public void Serialize(IXunitSerializationInfo info)
    {
        JsonSerializerSettings settings = new()
        {
            TypeNameHandling = TypeNameHandling.All,
            ContractResolver = new DefaultContractResolver
            {
                IgnoreSerializableInterface = false,
                IgnoreSerializableAttribute = false,
            },
            Formatting = Formatting.Indented,
        };

        string json = JsonConvert.SerializeObject(_testCases, settings);

        // Add serialized data to the serialization info
        info.AddValue("TestCases", json);
    }

    public void Deserialize(IXunitSerializationInfo info)
    {
        string json = info.GetValue<string>("TestCases");
        JsonSerializerSettings settings = new()
        {
            TypeNameHandling = TypeNameHandling.All,
            ContractResolver = new DefaultContractResolver
            {
                IgnoreSerializableInterface = false,
                IgnoreSerializableAttribute = false
            },
            Formatting = Formatting.Indented
        };

        var cases = JsonConvert.DeserializeObject<List<GraphicTestCase<TPage>>>(json, settings);
        _testCases.Clear();

        foreach (var testCase in cases)
        {
            _testCases.Add(testCase);
        }   
    }
}

Attempting to serialize / deserialize these values prevents my tests from being discovered in the test explorer, thus troubleshooting is quite hard.