diff --git a/test/services/test_netbox.py b/test/services/test_netbox.py
index c63d700e646b3e8ac10711cfb276ddfa048156f9..4b5bbf0e8926a2f86e05a90ce40b587aa2ea7f06 100644
--- a/test/services/test_netbox.py
+++ b/test/services/test_netbox.py
@@ -4,7 +4,7 @@ Unit tests for testing the netbox client
 
 import uuid
 from os import PathLike
-from unittest.mock import patch
+from unittest.mock import patch, Mock
 import pytest
 from pynetbox.core.response import Record
 
@@ -62,6 +62,21 @@ def interface():
     return Record(values, None, None)
 
 
+@pytest.fixture(scope="module")
+def app():
+    app = Mock()
+    app.token = "abc123"
+    app.base_url = "http://localhost:8080/testing/api"
+    return app
+
+
+@pytest.fixture(scope="module")
+def endpoint():
+    endpoint = Mock()
+    endpoint.name = "test-endpoint"
+    return endpoint
+
+
 @patch("gso.services.netbox_client.pynetbox.api")
 def test_create_device(mock_api,
                        device,
@@ -158,15 +173,18 @@ def test_reserve_interface(mock_api, device, interface, data_config_filename: Pa
     """
     # Set interface to not reserved
     interface.enabled = False
-    interface.api = mock_api
 
     # Mock netbox api
     mock_api.return_value.dcim.devices.get.return_value = device
     mock_api.return_value.dcim.interfaces.get.return_value = interface
-    mock_api.return_value.dcim.interfaces.save.return_value = interface
+
+    # mock save method
+    mock_save = Mock()
+    mock_save.save.return_value = interface
+    interface.save = mock_save
 
     # Check reservation of interface
     updated_interface = NetBoxClient().reserve_interface(device.name, interface.name)
 
     assert updated_interface is not None
-    assert updated_interface.enabled is not True
+    assert updated_interface.enabled is True