diff --git a/.github/workflows/fiber.yml b/.github/workflows/fiber.yml
index e8e6755..ae1497f 100644
--- a/.github/workflows/fiber.yml
+++ b/.github/workflows/fiber.yml
@@ -79,7 +79,7 @@ jobs:
           name: jfoa-open_channel-reports-${{ runner.os }}
           path: ./report
 
-  fiber_test_accept_channel_cancel_invoice_connect_peer_disconnect_peer:
+  fiber_test_accept_channel_cancel_invoice_connect_peer_disconnect_peer_backup:
     needs: prepare
     runs-on: ubuntu-22.04
 
@@ -106,7 +106,7 @@ jobs:
           tar -xzf prepare-backup.tar.gz
 
       - name: Run fiber_test_demo
-        run: make fiber_test_demo FIBER_TEST_DEMO="test_cases/fiber/devnet/accept_channel test_cases/fiber/devnet/cancel_invoice test_cases/fiber/devnet/connect_peer test_cases/fiber/devnet/disconnect_peer"
+        run: make fiber_test_demo FIBER_TEST_DEMO="test_cases/fiber/devnet/accept_channel test_cases/fiber/devnet/cancel_invoice test_cases/fiber/devnet/connect_peer test_cases/fiber/devnet/disconnect_peer test_cases/fiber/devnet/backup"
 
       - name: Publish reports
         if: failure()
diff --git a/test_cases/fiber/devnet/backup/test_backup.py b/test_cases/fiber/devnet/backup/test_backup.py
new file mode 100644
index 0000000..da9ab41
--- /dev/null
+++ b/test_cases/fiber/devnet/backup/test_backup.py
@@ -0,0 +1,61 @@
+import shutil
+import time
+
+from framework.basic_fiber import FiberTest
+
+
+class TestBackup(FiberTest):
+
+    def test_backup(self):
+        """
+        1. 关闭节点
+        2. 替换节点
+        3. 重启，send payment
+        Returns:
+        """
+        self.open_channel(self.fiber1, self.fiber2, 1000 * 100000000, 1)
+        before_graph_nodes = self.fiber2.get_client().graph_nodes()
+        self.fiber1.stop()
+        self.fiber1.prepare({"fiber_listening_addr": "/ip4/127.0.0.1/tcp/8238"})
+        self.fiber1.start()
+        time.sleep(5)
+        after_graph_nodes = self.fiber2.get_client().graph_nodes()
+        self.send_payment(self.fiber1, self.fiber2, 1)
+        print(before_graph_nodes)
+        print(after_graph_nodes)
+        assert (
+            after_graph_nodes["nodes"][1]["addresses"]
+            == self.fiber1.get_client().node_info()["addresses"]
+        )
+
+    def test_backup2(self):
+        """
+        1. 不关闭节点
+        2. 直接备份数据
+        3. 重启，send payment
+        Returns:
+        """
+        self.open_channel(self.fiber1, self.fiber2, 1000 * 100000000, 1)
+        shutil.copytree(
+            f"{self.fiber1.tmp_path}/fiber", f"{self.fiber1.tmp_path}/fiber.bak"
+        )
+        self.fiber1.stop()
+        shutil.rmtree(f"{self.fiber1.tmp_path}/fiber")
+        shutil.copytree(
+            f"{self.fiber1.tmp_path}/fiber.bak", f"{self.fiber1.tmp_path}/fiber"
+        )
+        self.fiber1.start()
+        time.sleep(5)
+        self.send_payment(self.fiber1, self.fiber2, 1)
+
+    def test_backup3(self):
+        self.open_channel(self.fiber1, self.fiber2, 1000 * 100000000, 1)
+        self.fiber1.stop()
+        self.fiber1.prepare({"fiber_listening_addr": "/ip4/127.0.0.1/tcp/8238"})
+        self.fiber1.start("newPassword2")
+        time.sleep(5)
+        self.send_payment(self.fiber1, self.fiber2, 1)
+        self.fiber1.stop()
+        self.fiber1.start("newPassword2")
+        time.sleep(5)
+        self.send_payment(self.fiber1, self.fiber2, 1)
diff --git a/test_cases/fiber/devnet/send_payment/params/test_max_fee_amount.py b/test_cases/fiber/devnet/send_payment/params/test_max_fee_amount.py
index 29a1002..4966f10 100644
--- a/test_cases/fiber/devnet/send_payment/params/test_max_fee_amount.py
+++ b/test_cases/fiber/devnet/send_payment/params/test_max_fee_amount.py
@@ -75,11 +75,30 @@ def test_fee(self):
         )
         self.wait_payment_state(self.fiber1, payment1["payment_hash"])
 
-    #
-    #
-    # def test_max_fee_amount_is_none(self):
-    #     """
-    #     max_fee_amount == node  代表什么
-    #     Returns:
-    #
-    #     """
+    @pytest.mark.skip(reason="panic")
+    def test_max_fee_0xffffffffffffffffffffffffffffffff(self):
+        self.open_channel(self.fiber1, self.fiber2, 1000 * 100000000, 1000 * 100000000)
+        invoice = self.fiber1.get_client().new_invoice(
+            {
+                "amount": hex(1 * 100000000),
+                "currency": "Fibd",
+                "description": "test invoice generated by node2",
+                "expiry": "0xe10",
+                "final_cltv": "0x28",
+                "payment_preimage": self.generate_random_preimage(),
+                "hash_algorithm": "sha256",
+            }
+        )
+        with pytest.raises(Exception) as exc_info:
+            self.fiber2.get_client().send_payment(
+                {
+                    "invoice": invoice["invoice_address"],
+                    "max_fee_amount": "0xffffffffffffffffffffffffffffffff",
+                }
+            )
+        expected_error_message = ""
+        assert expected_error_message in exc_info.value.args[0], (
+            f"Expected substring '{expected_error_message}' "
+            f"not found in actual string '{exc_info.value.args[0]}'"
+        )
+        self.fiber2.get_client().node_info()