diff --git a/lib/datadog/di/contrib/active_record.rb b/lib/datadog/di/contrib/active_record.rb
index d929cde49ed..87e8618d7a0 100644
--- a/lib/datadog/di/contrib/active_record.rb
+++ b/lib/datadog/di/contrib/active_record.rb
@@ -5,6 +5,7 @@
   # steep:ignore:start
   value_to_serialize = {
     attributes: value.attributes,
+    new_record: value.new_record?,
   }
   serializer.serialize_value(value_to_serialize, depth: depth ? depth - 1 : nil, type: value.class)
   # steep:ignore:end
diff --git a/spec/datadog/di/contrib/active_record/serializer_active_record_spec.rb b/spec/datadog/di/contrib/active_record/serializer_active_record_spec.rb
index df6cf17f317..807731cf8b1 100644
--- a/spec/datadog/di/contrib/active_record/serializer_active_record_spec.rb
+++ b/spec/datadog/di/contrib/active_record/serializer_active_record_spec.rb
@@ -78,6 +78,9 @@ def mysql_connection_string
        expected: {type: "SerializerRailsSpecTestEmptyModel", entries: [[
          {type: 'Symbol', value: 'attributes'},
          {type: 'Hash', entries: [[{type: 'String', value: 'id'}, {type: 'NilClass', isNull: true}]]},
+       ], [
+         {type: 'Symbol', value: 'new_record'},
+         {type: 'TrueClass', value: 'true'},
        ]]}},
       {name: "AR model with empty attributes",
        input: -> { SerializerRailsSpecTestBasicModel.new },
@@ -89,6 +92,9 @@ def mysql_connection_string
            [{type: 'String', value: 'created_at'}, {type: 'NilClass', isNull: true}],
            [{type: 'String', value: 'updated_at'}, {type: 'NilClass', isNull: true}],
          ]},
+       ], [
+         {type: 'Symbol', value: 'new_record'},
+         {type: 'TrueClass', value: 'true'},
        ]]}},
       {name: "AR model with filled out attributes",
        input: -> {
@@ -101,10 +107,30 @@ def mysql_connection_string
          {type: 'Hash', entries: [
            [{type: 'String', value: 'id'}, {type: 'NilClass', isNull: true}],
            [{type: 'String', value: 'title'}, {type: 'String', value: 'Hello, world!'}],
-           # TODO serialize Time, Date, DateTime types
            [{type: 'String', value: 'created_at'}, {type: 'Time', value: '2020-01-02T00:00:00Z'}],
            [{type: 'String', value: 'updated_at'}, {type: 'Time', value: '2020-01-03T00:00:00Z'}],
          ]},
+       ], [
+         {type: 'Symbol', value: 'new_record'},
+         {type: 'TrueClass', value: 'true'},
+       ]]}},
+      {name: "AR model with filled out attributes and persisted",
+       input: -> {
+                SerializerRailsSpecTestBasicModel.create!(
+                  title: 'Hello, world!', created_at: Time.utc(2020, 1, 2), updated_at: Time.utc(2020, 1, 3)
+                )
+              },
+       expected: {type: "SerializerRailsSpecTestBasicModel", entries: [[
+         {type: 'Symbol', value: 'attributes'},
+         {type: 'Hash', entries: [
+           [{type: 'String', value: 'id'}, {type: 'Integer', value: '1'}],
+           [{type: 'String', value: 'title'}, {type: 'String', value: 'Hello, world!'}],
+           [{type: 'String', value: 'created_at'}, {type: 'Time', value: '2020-01-02T00:00:00Z'}],
+           [{type: 'String', value: 'updated_at'}, {type: 'Time', value: '2020-01-03T00:00:00Z'}],
+         ]},
+       ], [
+         {type: 'Symbol', value: 'new_record'},
+         {type: 'FalseClass', value: 'false'},
        ]]}},
     ]