diff --git a/src/telemetry/backend/service/EmulatedCollector.py b/src/telemetry/backend/service/EmulatedCollector.py
index 5f546d043653f4cad6371abe15fb69099ff3389f..cffff516f00ddb338739df0a3538a52900f07601 100644
--- a/src/telemetry/backend/service/EmulatedCollector.py
+++ b/src/telemetry/backend/service/EmulatedCollector.py
@@ -1,3 +1,17 @@
+# Copyright 2022-2024 ETSI OSG/SDG TeraFlowSDN (TFS) (https://tfs.etsi.org/)
+#
+# 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 numpy as np
 import random
 import threading
diff --git a/src/telemetry/backend/service/EmulatedCollectorMultiple.py b/src/telemetry/backend/service/EmulatedCollectorMultiple.py
index 54886e5db865ecb36cf4dd17c99c1203628940b7..5be634deac941fb3c17ed1b5c031da0bd2357600 100644
--- a/src/telemetry/backend/service/EmulatedCollectorMultiple.py
+++ b/src/telemetry/backend/service/EmulatedCollectorMultiple.py
@@ -1,3 +1,17 @@
+# Copyright 2022-2024 ETSI OSG/SDG TeraFlowSDN (TFS) (https://tfs.etsi.org/)
+#
+# 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 numpy as np
 import random
 import threading
diff --git a/src/telemetry/backend/tests/test_backend.py b/src/telemetry/backend/tests/test_backend.py
index 3ddbedf937f2fb42092181d1822bf7b1c2823dca..a8d47da454df9c894e7e3f1a805d58d5cf7d777f 100644
--- a/src/telemetry/backend/tests/test_backend.py
+++ b/src/telemetry/backend/tests/test_backend.py
@@ -13,11 +13,11 @@
 # limitations under the License.
 
 import logging
+import time
 from typing import Dict
-from .messages import create_collector_request
 from common.tools.kafka.Variables import KafkaTopic
 from telemetry.backend.service.TelemetryBackendService import TelemetryBackendService
-import time
+from .messages import create_collector_request
 
 LOGGER = logging.getLogger(__name__)