public void BeEquivalentTo_Default_Interface_Method()
    {
        List<ITest> lista = [new Test { Name = "Test" }];
        List<ITest> listb = [new Test { Name = "Test" }];

        lista.Should().BeEquivalentTo(listb); // Fails with: Expectation has property lista[0].NameLength that the other object does not have.
    }
    
    public class Test : ITest
    {
        public string Name { get; set; }
    }

    public interface ITest
    {
        public string Name { get; }
        public int NameLength => Name.Length;
    }