Failing Test on RavenDB.Client

DeserializationTest.cs

public class DeserializationTest : RavenTestDriver {
        private IDocumentStore? _documentStore { get; set; }

        protected override void PreInitialize(IDocumentStore documentStore) {
            base.PreInitialize( documentStore );

            documentStore.Conventions.IdentityPartsSeparator = '-';
            documentStore.Conventions.Serialization = new NewtonsoftJsonSerializationConventions() {
                CustomizeJsonSerializer = serializer => {
                    serializer.TypeNameHandling = TypeNameHandling.Objects;
                }
            };

        }

        public DeserializationTest() {


        }

        [Fact]
        public void ShouldStoreAndRetrieveDictionary_Fails() {
            ConfigureServer( new TestServerOptions {
                DataDirectory = "D:\\Raven\\TestDB",
            } );
            _documentStore = GetDocumentStore( new GetDocumentStoreOptions() {
            } );
            string id = null;
            using( var session = _documentStore.OpenSession() ) {
                var doc = new Test() {
                    Settings = new Dictionary<string, object>
                    {
                            {"lastUsedUnitId", new Dictionary<int, string>()
                            {
                                {1, "units-3368"}
                            }}
                        }
                };
                session.Store( doc );
                id = doc.Id;
                session.SaveChanges();
            }

            WaitForUserToContinueTheTest( _documentStore );

            using( var session = _documentStore.OpenSession() ) {
                session.Advanced.DocumentStore.Operations.Send( new PatchOperation(
                    id: id,
                    changeVector: null,
                    patch: new PatchRequest {
                        Script = @"this.Settings[""lastUsedUnitId""] = {
                                        ""1"": ""units-3982"",
                                        ""$type"": ""System.Collections.Generic.Dictionary`2[[System.Int32, System.Private.CoreLib],[System.String, System.Private.CoreLib]], System.Private.CoreLib""
                                    };"
                    },
                    patchIfMissing: null ) );
            }


            using( var session = _documentStore.OpenSession() ) {
                var result = session.Load<Test>( id );
                WaitForUserToContinueTheTest( _documentStore );
                Assert.True( result.Settings.TryGetValue( "lastUsedUnitId", out var dict ) );
                Assert.True( dict.GetType() == typeof( Dictionary<int, string> ) );
            }
        }


        [Fact]
        public void ShouldStoreAndRetrieveDictionary_Passes() {
            ConfigureServer( new TestServerOptions {
                DataDirectory = "D:\\Raven\\TestDB",
            } );
            _documentStore = GetDocumentStore( new GetDocumentStoreOptions() {
            } );
            string id = null;
            using( var session = _documentStore.OpenSession() ) {
                var doc = new Test() {
                    Settings = new Dictionary<string, object>
                    {
                            {"lastUsedUnitId", new Dictionary<int, string>()
                            {
                                {1, "units-3368"}
                            }}
                        }
                };
                session.Store( doc );
                id = doc.Id;
                session.SaveChanges();
            }

            WaitForUserToContinueTheTest( _documentStore );

            using( var session = _documentStore.OpenSession() ) {
                var result = session.Load<Test>( id );
                WaitForUserToContinueTheTest( _documentStore );
                Assert.True( result.Settings.TryGetValue( "lastUsedUnitId", out var dict ) );
                Assert.True( dict.GetType() == typeof( Dictionary<int, string> ) );
            }
        }

        private class Test {
            public string Id { get; set; }
            public Dictionary<string, object> Settings { get; set; }
        }

    }