diff --git a/src/service/tests/test_unitary.py b/src/service/tests/test_unitary.py
index 54a7a2c55b7729c10333312766a45e1e77e5a880..b8bb0b7ed52d9be19d1eb64f2d7ff005079fc1f9 100644
--- a/src/service/tests/test_unitary.py
+++ b/src/service/tests/test_unitary.py
@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import copy, grpc, logging, pytest
+import copy, grpc, json, logging, pytest
 from common.proto.context_pb2 import (
     Context, ContextId, Device, DeviceId, Link, LinkId, Service, ServiceId, Topology, TopologyId)
 from common.tests.PytestGenerateTests import pytest_generate_tests # (required) pylint: disable=unused-import
@@ -39,23 +39,23 @@ class TestServiceHandlers:
     scenarios = SERVICE_HANDLERS_TO_TEST
 
     def test_prepare_environment(
-        self, service_id, service_descriptor, service_endpoint_ids, service_config_rules, service_constraints,
-        service_constraints_location, service_constraints_location_new,
-        contexts, topologies, devices, links,
+        self, contexts, topologies, devices, links, service_id, service_descriptor, service_endpoint_ids,
+        service_config_rules, service_constraints, service_constraints_location, service_constraints_location_new,
         context_client : ContextClient,     # pylint: disable=redefined-outer-name
         device_client : DeviceClient,       # pylint: disable=redefined-outer-name
         service_client : ServiceClient):    # pylint: disable=redefined-outer-name
 
         for context in contexts: context_client.SetContext(Context(**context))
         for topology in topologies: context_client.SetTopology(Topology(**topology))
-        for device in devices: device_client.AddDevice(Device(**device))
+        for device in devices:
+            LOGGER.warning('device: {:s}'.format(json.dumps(device)))
+            device_client.AddDevice(Device(**device))
         for link in links: context_client.SetLink(Link(**link))
 
 
     def test_service_create_error_cases(
-        self, service_id, service_descriptor, service_endpoint_ids, service_config_rules, service_constraints,
-        service_constraints_location, service_constraints_location_new,
-        contexts, topologies, devices, links,
+        self, contexts, topologies, devices, links, service_id, service_descriptor, service_endpoint_ids,
+        service_config_rules, service_constraints, service_constraints_location, service_constraints_location_new,
         context_client : ContextClient,     # pylint: disable=redefined-outer-name
         device_client : DeviceClient,       # pylint: disable=redefined-outer-name
         service_client : ServiceClient):    # pylint: disable=redefined-outer-name