diff --git a/airflow/utils/task_group.py b/airflow/utils/task_group.py
index 4b8392be7b3f0..4d79d74e24de1 100644
--- a/airflow/utils/task_group.py
+++ b/airflow/utils/task_group.py
@@ -179,7 +179,7 @@ def _check_for_group_id_collisions(self, add_suffix_on_collision: bool):
 
     def _update_default_args(self, parent_group: TaskGroup):
         if parent_group.default_args:
-            self.default_args = {**self.default_args, **parent_group.default_args}
+            self.default_args = {**parent_group.default_args, **self.default_args}
 
     @classmethod
     def create_root(cls, dag: DAG) -> TaskGroup:
diff --git a/tests/utils/test_task_group.py b/tests/utils/test_task_group.py
index c9927eb3ba257..a5262aa2eb03b 100644
--- a/tests/utils/test_task_group.py
+++ b/tests/utils/test_task_group.py
@@ -1368,11 +1368,16 @@ def test_override_dag_default_args_in_multi_level_nested_tg():
                 "execution_timeout": timedelta(seconds=10),
             },
         ):
-            with TaskGroup(group_id="first_nested_task_group"):
+            with TaskGroup(
+                group_id="first_nested_task_group",
+                default_args={
+                    "owner": "z",
+                },
+            ):
                 with TaskGroup(group_id="second_nested_task_group"):
                     with TaskGroup(group_id="third_nested_task_group"):
                         task = EmptyOperator(task_id="task")
 
     assert task.retries == 1
-    assert task.owner == "y"
+    assert task.owner == "z"
     assert task.execution_timeout == timedelta(seconds=10)