[Fact]
public void SerializeWithTabs()
{
    var tabString = " ";
    using var writer = new StringWriter();
    using var indentedTextWriter = new IndentedTextWriter(writer, tabString) { Indent = 2 };

    //create a dictionary with a list of strings to test the tabbed serialization
    var items = new List<string> { "item 1", "item 2" };
    var list = new Dictionary<string, List<string>> { { "key", items } };

    SerializerBuilder
        .Build()
        .Serialize(indentedTextWriter, list);

    //split serialized output into lines
    var lines = indentedTextWriter.InnerWriter.ToString().Split(new[] { Environment.NewLine }, StringSplitOptions.None);

    //expected indentation
    var indent = string.Join(string.Empty, Enumerable.Repeat(tabString, indentedTextWriter.Indent).ToList());

    //check that the serialized lines (excluding the first and last) start with the expected indentation
    lines.Skip(1).Take(lines.Length - 2).Where(element => element.StartsWith(indent)).Should().HaveCount(items.Count);
}