diff --git a/tests/serialization/json/JsonSerializationWriterTests.cs b/tests/serialization/json/JsonSerializationWriterTests.cs
index ed9a4b2c..cd036e04 100644
--- a/tests/serialization/json/JsonSerializationWriterTests.cs
+++ b/tests/serialization/json/JsonSerializationWriterTests.cs
@@ -41,8 +41,12 @@ public void WritesSampleObjectValue()
                     {"businessPhones", new List<string>() {"+1 412 555 0109"}}, // write collection of primitives value
                     {"endDateTime", new DateTime(2023,03,14,0,0,0,DateTimeKind.Utc) }, // ensure the DateTime doesn't crash
                     {"manager", new TestEntity{Id = "48d31887-5fad-4d73-a9f5-3c356e68a038"}}, // write nested object value
+                    {"anonymousObject", new {Value1 = true, Value2 = "", Value3 = new List<string>{ "Value3.1", "Value3.2"}}}, // write nested object value
+                    {"dictionaryString", new Dictionary<string, string>{{"91bbe8e2-09b2-482b-a90e-00f8d7e81636", "b7992f48-a51b-41a1-ace5-4cebb7f111d0"}, { "ed64c116-2776-4012-94d1-a348b9d241bd", "55e1b4d0-2959-4c71-89b5-385ba5338a1c" }, }}, // write a Dictionary
+                    {"dictionaryTestEntity", new Dictionary<string, TestEntity>{{ "dd476fc9-7e97-4a4e-8d40-6c3de7432eb3", new TestEntity { Id = "dd476fc9-7e97-4a4e-8d40-6c3de7432eb3" } }, { "ffa5c351-7cf5-43df-9b55-e12455cf6eb2", new TestEntity { Id = "ffa5c351-7cf5-43df-9b55-e12455cf6eb2" } }, }}, // write a Dictionary
                 }
             };
+
             using var jsonSerializerWriter = new JsonSerializationWriter();
             // Act
             jsonSerializerWriter.WriteObjectValue(string.Empty, testEntity);
@@ -65,7 +69,10 @@ public void WritesSampleObjectValue()
                                  "\"weightInKgs\":51.80," +
                                  "\"businessPhones\":[\"\\u002B1 412 555 0109\"]," +
                                  "\"endDateTime\":\"2023-03-14T00:00:00+00:00\"," +
-                                 "\"manager\":{\"id\":\"48d31887-5fad-4d73-a9f5-3c356e68a038\"}" +
+                                 "\"manager\":{\"id\":\"48d31887-5fad-4d73-a9f5-3c356e68a038\"}," +
+                                 "\"anonymousObject\":{\"Value1\":true,\"Value2\":\"\",\"Value3\":[\"Value3.1\",\"Value3.2\"]}," +
+                                 "\"dictionaryString\":{\"91bbe8e2-09b2-482b-a90e-00f8d7e81636\":\"b7992f48-a51b-41a1-ace5-4cebb7f111d0\",\"ed64c116-2776-4012-94d1-a348b9d241bd\":\"55e1b4d0-2959-4c71-89b5-385ba5338a1c\"}," +
+                                 "\"dictionaryTestEntity\":{\"dd476fc9-7e97-4a4e-8d40-6c3de7432eb3\":{\"id\":\"dd476fc9-7e97-4a4e-8d40-6c3de7432eb3\"},\"ffa5c351-7cf5-43df-9b55-e12455cf6eb2\":{\"id\":\"ffa5c351-7cf5-43df-9b55-e12455cf6eb2\"}}" +
                                  "}";
             Assert.Equal(expectedString, serializedJsonString);
         }