diff --git a/airflow/models/mappedoperator.py b/airflow/models/mappedoperator.py
index 925acfc16f0c1..9a5c1b563ce4d 100644
--- a/airflow/models/mappedoperator.py
+++ b/airflow/models/mappedoperator.py
@@ -821,6 +821,8 @@ def unmap(self, resolve: None | Mapping[str, Any] | tuple[Context, Session]) ->
         from airflow.serialization.serialized_objects import SerializedBaseOperator
 
         op = SerializedBaseOperator(task_id=self.task_id, params=self.params, _airflow_from_mapped=True)
+        for partial_attr, value in self.partial_kwargs.items():
+            setattr(op, partial_attr, value)
         SerializedBaseOperator.populate_operator(op, self.operator_class)
         if self.dag is not None:  # For Mypy; we only serialize tasks in a DAG so the check always satisfies.
             SerializedBaseOperator.set_task_dag_references(op, self.dag)
diff --git a/tests/serialization/test_dag_serialization.py b/tests/serialization/test_dag_serialization.py
index d10984556ff23..f04ff3e2568dd 100644
--- a/tests/serialization/test_dag_serialization.py
+++ b/tests/serialization/test_dag_serialization.py
@@ -2529,7 +2529,11 @@ def test_operator_expand_deserialized_unmap():
     ser_normal = BaseSerialization.serialize(normal)
     deser_normal = BaseSerialization.deserialize(ser_normal)
     deser_normal.dag = None
-    assert deser_mapped.unmap(None) == deser_normal
+    unmapped_deser_mapped = deser_mapped.unmap(None)
+
+    assert type(unmapped_deser_mapped) is type(deser_normal) is SerializedBaseOperator
+    assert unmapped_deser_mapped.task_id == deser_normal.task_id == "a"
+    assert unmapped_deser_mapped.executor_config == deser_normal.executor_config == {"a": "b"}
 
 
 @pytest.mark.db_test