diff --git a/src/benchmarks/micro/Serializers/DataGenerator.cs b/src/benchmarks/micro/Serializers/DataGenerator.cs
index 1591f649c2d..672641e2604 100644
--- a/src/benchmarks/micro/Serializers/DataGenerator.cs
+++ b/src/benchmarks/micro/Serializers/DataGenerator.cs
@@ -53,6 +53,8 @@ internal static T Generate<T>()
                 return (T)(object)new Hashtable(ValuesGenerator.ArrayOfUniqueValues<string>(100).ToDictionary(value => value));
             if (typeof(T) == typeof(LargeStructWithProperties))
                 return (T)(object)CreateLargeStructWithProperties();
+            if (typeof(T) == typeof(DateTimeOffset?))
+                return (T)(object)new DateTimeOffset(2021, 08, 13, 11, 11, 05, TimeSpan.Zero);
             if (typeof(T) == typeof(int))
                 return (T)(object)42;
 
diff --git a/src/benchmarks/micro/libraries/System.Text.Json/Serializer/ReadJson.cs b/src/benchmarks/micro/libraries/System.Text.Json/Serializer/ReadJson.cs
index db28e852ead..4aad1d34e2e 100644
--- a/src/benchmarks/micro/libraries/System.Text.Json/Serializer/ReadJson.cs
+++ b/src/benchmarks/micro/libraries/System.Text.Json/Serializer/ReadJson.cs
@@ -26,6 +26,7 @@ namespace System.Text.Json.Serialization.Tests
     [GenericTypeArguments(typeof(Hashtable))]
     [GenericTypeArguments(typeof(SimpleStructWithProperties))]
     [GenericTypeArguments(typeof(LargeStructWithProperties))]
+    [GenericTypeArguments(typeof(DateTimeOffset?))]
     [GenericTypeArguments(typeof(int))]
     public class ReadJson<T>
     {
diff --git a/src/benchmarks/micro/libraries/System.Text.Json/Serializer/WriteJson.cs b/src/benchmarks/micro/libraries/System.Text.Json/Serializer/WriteJson.cs
index d3ce922ecd8..dcf2deabe7c 100644
--- a/src/benchmarks/micro/libraries/System.Text.Json/Serializer/WriteJson.cs
+++ b/src/benchmarks/micro/libraries/System.Text.Json/Serializer/WriteJson.cs
@@ -27,6 +27,7 @@ namespace System.Text.Json.Serialization.Tests
     [GenericTypeArguments(typeof(Hashtable))]
     [GenericTypeArguments(typeof(SimpleStructWithProperties))]
     [GenericTypeArguments(typeof(LargeStructWithProperties))]
+    [GenericTypeArguments(typeof(DateTimeOffset?))]
     [GenericTypeArguments(typeof(int))]
     public class WriteJson<T>
     {