It's was hard but i have finally a beginning of test for start VPCS

tests/api/test_version.py

@@ -52,7 +52,7 @@ def test_version_invalid_input_schema(server):
 
 
 @asyncio_patch("gns3server.handlers.version_handler.VersionHandler", return_value={})
-def test_version_invalid_output_schema():
+def test_version_invalid_output_schema(server):
     query = {'version': "0.4.2"}
     response = server.post('/version', query)
     assert response.status == 400

tests/api/test_vpcs.py

@@ -21,7 +21,7 @@ from gns3server import modules
 
 
 @asyncio_patch('gns3server.modules.VPCS.create_vm', return_value=84)
-def test_vpcs_create(server, mock):
+def test_vpcs_create(server):
     response = server.post('/vpcs', {'name': 'PC TEST 1'}, example=False)
     assert response.status == 200
     assert response.route == '/vpcs'