ServiceStack.Text testing separator issue

ServiceStackTest

using System.Collections.Generic;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using ServiceStack.Text;

namespace UnitTestProject1
{
    [TestClass]
    public class UnitTest1
    {
        private readonly List<Person> people = new List<Person>
                     {
                         new Person
                         {
                             Age = new decimal(33.45),
                             Name = "José Manuel",
                         }
                     };

        // both differ only in the separator. 
        private const string ExpectedTest2 = "Age;Name\r\n33.45;José Manuel\r\n";
        private const string ExpectedTest1 = "Age;Name\r\n33,45;José Manuel\r\n";

        [TestInitialize]
        public void TestInitilize()
        {
            CsvConfig.Reset();
        }

        /// <summary>
        /// THIS FAILS!
        /// </summary>
        [TestMethod]
        public void UseCommaAsDecimalSeparator_ModifyingSerializeFn()
        {
            CsvConfig.ItemSeperatorString = ";";
            JsConfig<decimal>.SerializeFn = d => d.ToString("0.00");

            var serializationResult = CsvSerializer.SerializeToCsv(people);
            Assert.AreEqual(ExpectedTest1, serializationResult);
        }

        /// <summary>
        /// This behaves correctly
        /// </summary>
        [TestMethod]
        public void WantToUsePointAsDecimalSeparator_NotModifyingDefaultBehavior()
        {
            CsvConfig.ItemSeperatorString = ";";            

            var serializationResult = CsvSerializer.SerializeToCsv(people);
            Assert.AreEqual(ExpectedTest2, serializationResult);
        }
    }


    internal class Person
    {
        public decimal Age { get; set; }
        public string Name { get; set; }
    }
}