diff --git a/plugins/tensorboard-plugins/tb_graph_ascend/test/unit/utils/.keep b/plugins/tensorboard-plugins/tb_graph_ascend/test/unit/utils/.keep
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/plugins/tensorboard-plugins/tb_graph_ascend/test/unit/utils/test_global_state b/plugins/tensorboard-plugins/tb_graph_ascend/test/unit/utils/test_global_state
new file mode 100644
index 0000000000000000000000000000000000000000..c8aa01b01af7d5f2c4bb4f93485f8e2c5b7eb6cb
--- /dev/null
+++ b/plugins/tensorboard-plugins/tb_graph_ascend/test/unit/utils/test_global_state
@@ -0,0 +1,34 @@
+# Copyright (c) 2025, Huawei Technologies.
+# All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ==============================================================================
+
+import unittest
+from server.app.utils.global_state import GraphState
+
+class TestGlobalState(unittest.TestCase):
+    def setUp(self):
+        GraphState.init_defaults()
+
+    def test_set_global_value(self):
+        GraphState.set_global_value('logdir', "./")
+        assert GraphState.get_global_value("logdir") == "./"
+
+    def test_get_global_value(self):
+        assert GraphState.get_global_value("logdir") == ""
+
+    def test_reset_global_state(self):
+        GraphState.set_global_value('logdir', "./")
+        GraphState.reset_global_state()
+        assert GraphState.get_global_value("logdir") == ""