diff --git a/src/kpi_manager/tests/test_messages.py b/src/kpi_manager/tests/test_messages.py
new file mode 100644
index 0000000000000000000000000000000000000000..589d6cb847def66aea28030f97cf09e914d32496
--- /dev/null
+++ b/src/kpi_manager/tests/test_messages.py
@@ -0,0 +1,69 @@
+# Copyright 2022-2023 ETSI TeraFlowSDN - TFS OSG (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.
+
+from common.proto import kpi_manager_pb2
+from common.proto.kpi_sample_types_pb2 import KpiSampleType
+
+def kpi_id():
+    _kpi_id             = kpi_manager_pb2.KpiId()
+    _kpi_id.kpi_id.uuid = str(1)            # pylint: disable=maybe-no-member
+    return _kpi_id
+
+def create_kpi_request(kpi_id_str):
+    _create_kpi_request                                     = kpi_manager_pb2.KpiDescriptor()
+    _create_kpi_request.kpi_description                     = 'KPI Description Test'
+    _create_kpi_request.kpi_sample_type                     = KpiSampleType.KPISAMPLETYPE_PACKETS_RECEIVED
+    _create_kpi_request.device_id.device_uuid.uuid          = 'DEV' + str(kpi_id_str)
+    _create_kpi_request.service_id.service_uuid.uuid        = 'SERV' + str(kpi_id_str)
+    _create_kpi_request.slice_id.slice_uuid.uuid            = 'SLC' + str(kpi_id_str)
+    _create_kpi_request.endpoint_id.endpoint_uuid.uuid      = 'END' + str(kpi_id_str)
+    _create_kpi_request.connection_id.connection_uuid.uuid  = 'CON' + str(kpi_id_str)
+    return _create_kpi_request
+
+def create_kpi_request_b():
+    _create_kpi_request                                = kpi_manager_pb2.KpiDescriptor()
+    _create_kpi_request.kpi_description                = 'KPI Description Test'
+    _create_kpi_request.kpi_sample_type                = KpiSampleType.KPISAMPLETYPE_PACKETS_RECEIVED
+    _create_kpi_request.device_id.device_uuid.uuid     = 'DEV2'     # pylint: disable=maybe-no-member
+    _create_kpi_request.service_id.service_uuid.uuid   = 'SERV2'    # pylint: disable=maybe-no-member
+    _create_kpi_request.slice_id.slice_uuid.uuid       = 'SLC2'  # pylint: disable=maybe-no-member
+    _create_kpi_request.endpoint_id.endpoint_uuid.uuid = 'END2'     # pylint: disable=maybe-no-member
+    _create_kpi_request.connection_id.connection_uuid.uuid = 'CON2'  # pylint: disable=maybe-no-member
+    return _create_kpi_request
+
+def create_kpi_request_c():
+    _create_kpi_request                                = kpi_manager_pb2.KpiDescriptor()
+    _create_kpi_request.kpi_description                = 'KPI Description Test'
+    _create_kpi_request.kpi_sample_type                = KpiSampleType.KPISAMPLETYPE_PACKETS_RECEIVED
+    _create_kpi_request.device_id.device_uuid.uuid     = 'DEV3'     # pylint: disable=maybe-no-member
+    _create_kpi_request.service_id.service_uuid.uuid   = 'SERV3'    # pylint: disable=maybe-no-member
+    _create_kpi_request.slice_id.slice_uuid.uuid       = 'SLC3'  # pylint: disable=maybe-no-member
+    _create_kpi_request.endpoint_id.endpoint_uuid.uuid = 'END3'     # pylint: disable=maybe-no-member
+    _create_kpi_request.connection_id.connection_uuid.uuid = 'CON3'  # pylint: disable=maybe-no-member
+    return _create_kpi_request
+
+def create_kpi_request_d():
+    _create_kpi_request                                = kpi_manager_pb2.KpiDescriptor()
+    _create_kpi_request.kpi_description                = 'KPI Description Test'
+    _create_kpi_request.kpi_sample_type                = KpiSampleType.KPISAMPLETYPE_PACKETS_RECEIVED
+    _create_kpi_request.device_id.device_uuid.uuid     = 'DEV4'     # pylint: disable=maybe-no-member
+    _create_kpi_request.service_id.service_uuid.uuid   = 'SERV4'    # pylint: disable=maybe-no-member
+    _create_kpi_request.slice_id.slice_uuid.uuid       = 'SLC4'  # pylint: disable=maybe-no-member
+    _create_kpi_request.endpoint_id.endpoint_uuid.uuid = 'END4'     # pylint: disable=maybe-no-member
+    _create_kpi_request.connection_id.connection_uuid.uuid = 'CON4'  # pylint: disable=maybe-no-member
+    return _create_kpi_request
+
+def kpi_descriptor_list():
+    _kpi_descriptor_list = kpi_manager_pb2.KpiDescriptorList()
+    return _kpi_descriptor_list
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