diff --git a/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/impl/config/embeddedcache/CmNotificationSubscriptionCacheConfigSpec.groovy b/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/impl/config/embeddedcache/CmNotificationSubscriptionCacheConfigSpec.groovy
index 86273bb..e65011f 100644
--- a/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/impl/config/embeddedcache/CmNotificationSubscriptionCacheConfigSpec.groovy
+++ b/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/impl/config/embeddedcache/CmNotificationSubscriptionCacheConfigSpec.groovy
@@ -50,7 +50,7 @@
             def subscriptionId = 'sub123'
             def dmiPluginName = 'dummydmi'
             def cmSubscriptionPredicate = new DmiCmNotificationSubscriptionPredicate(['cmhandle1', 'cmhandle2'].toSet(), DatastoreType.PASSTHROUGH_RUNNING, ['/a/b/c'].toSet())
-            def cmSubscriptionCacheObject = new DmiCmNotificationSubscriptionDetails(dmiCmNotificationSubscriptionPredicates: [cmSubscriptionPredicate], cmNotificationSubscriptionStatus: CmNotificationSubscriptionStatus.PENDING)
+            def cmSubscriptionCacheObject = new DmiCmNotificationSubscriptionDetails([cmSubscriptionPredicate], CmNotificationSubscriptionStatus.PENDING)
         when: 'the cache is populated'
             cmNotificationSubscriptionCache.put(subscriptionId, [(dmiPluginName): cmSubscriptionCacheObject])
         then: 'the values are present in memory'
diff --git a/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/impl/events/cmsubscription/CmNotificationSubscriptionNcmpInEventConsumerSpec.groovy b/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/impl/events/cmsubscription/CmNotificationSubscriptionNcmpInEventConsumerSpec.groovy
index 1074229..614cf67 100644
--- a/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/impl/events/cmsubscription/CmNotificationSubscriptionNcmpInEventConsumerSpec.groovy
+++ b/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/impl/events/cmsubscription/CmNotificationSubscriptionNcmpInEventConsumerSpec.groovy
@@ -39,7 +39,8 @@
 @SpringBootTest(classes = [ObjectMapper, JsonObjectMapper])
 class CmNotificationSubscriptionNcmpInEventConsumerSpec extends MessagingBaseSpec {
 
-    def objectUnderTest = new CmNotificationSubscriptionNcmpInEventConsumer()
+    def mockDmiCmNotificationSubscriptionCacheHandler = Mock(DmiCmNotificationSubscriptionCacheHandler)
+    def objectUnderTest = new CmNotificationSubscriptionNcmpInEventConsumer(mockDmiCmNotificationSubscriptionCacheHandler)
     def logger = Spy(ListAppender<ILoggingEvent>)
 
     @Autowired
@@ -60,7 +61,7 @@
 
     def 'Consume valid CMSubscription create message'() {
         given: 'a cmsubscription event'
-            def jsonData = TestUtils.getResourceFileContent('cmSubscription/cmSubscriptionNcmpInEvent.json')
+            def jsonData = TestUtils.getResourceFileContent('cmSubscription/cmNotificationSubscriptionNcmpInEvent.json')
             def testEventSent = jsonObjectMapper.convertJsonString(jsonData, CmNotificationSubscriptionNcmpInEvent.class)
             def testCloudEventSent = CloudEventBuilder.v1()
                 .withData(objectMapper.writeValueAsBytes(testEventSent))
@@ -78,6 +79,8 @@
             assert loggingEvent.level == Level.INFO
         and: 'the log indicates the task completed successfully'
             assert loggingEvent.formattedMessage == 'Subscription with name cm-subscription-001 to be mapped to hazelcast object...'
+        and: 'the cache handler method is called once'
+            1 * mockDmiCmNotificationSubscriptionCacheHandler.add('cm-subscription-001',_)
     }
 
     def getLoggingEvent() {
diff --git a/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/impl/events/cmsubscription/DmiCmNotificationSubscriptionCacheHandlerSpec.groovy b/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/impl/events/cmsubscription/DmiCmNotificationSubscriptionCacheHandlerSpec.groovy
new file mode 100644
index 0000000..132c4bc
--- /dev/null
+++ b/cps-ncmp-service/src/test/groovy/org/onap/cps/ncmp/api/impl/events/cmsubscription/DmiCmNotificationSubscriptionCacheHandlerSpec.groovy
@@ -0,0 +1,141 @@
+/*
+ *  ============LICENSE_START=======================================================
+ *  Copyright (C) 2024 Nordix Foundation
+ *  ================================================================================
+ *  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.
+ *
+ *  SPDX-License-Identifier: Apache-2.0
+ *  ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.ncmp.api.impl.events.cmsubscription
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import io.cloudevents.CloudEvent
+import io.cloudevents.core.builder.CloudEventBuilder
+import org.apache.kafka.clients.consumer.ConsumerRecord
+import org.onap.cps.ncmp.api.impl.inventory.InventoryPersistence
+import org.onap.cps.ncmp.api.impl.yangmodels.YangModelCmHandle
+import org.onap.cps.ncmp.api.kafka.MessagingBaseSpec
+import org.onap.cps.ncmp.events.cmnotificationsubscription_merge1_0_0.client_to_ncmp.CmNotificationSubscriptionNcmpInEvent
+import org.onap.cps.ncmp.utils.TestUtils
+import org.onap.cps.utils.JsonObjectMapper
+import org.spockframework.spring.SpringBean
+import org.springframework.beans.factory.annotation.Autowired
+import org.springframework.boot.test.context.SpringBootTest
+
+import static org.onap.cps.ncmp.api.impl.events.mapper.CloudEventMapper.toTargetEvent
+
+@SpringBootTest(classes = [ObjectMapper, JsonObjectMapper])
+class DmiCmNotificationSubscriptionCacheHandlerSpec extends MessagingBaseSpec {
+
+    @Autowired
+    JsonObjectMapper jsonObjectMapper
+    @Autowired
+    ObjectMapper objectMapper
+    @SpringBean
+    InventoryPersistence mockInventoryPersistence = Mock(InventoryPersistence)
+
+    def testCache = [:]
+    def objectUnderTest = new DmiCmNotificationSubscriptionCacheHandler(testCache, mockInventoryPersistence)
+
+    CmNotificationSubscriptionNcmpInEvent cmNotificationSubscriptionNcmpInEvent
+    def yangModelCmHandle1 = new YangModelCmHandle(id:'ch1',dmiServiceName:'dmi-1')
+    def yangModelCmHandle2 = new YangModelCmHandle(id:'ch2',dmiServiceName:'dmi-2')
+    def yangModelCmHandle3 = new YangModelCmHandle(id:'ch3',dmiServiceName:'dmi-1')
+    def yangModelCmHandle4 = new YangModelCmHandle(id:'ch4',dmiServiceName:'dmi-2')
+
+    def setup() {
+        setUpTestEvent()
+        initialiseMockInventoryPersistenceResponses()
+    }
+
+    def 'Load CM subscription event to cache'() {
+        given: 'a valid subscription event with Id'
+            def subscriptionId = cmNotificationSubscriptionNcmpInEvent.getData().getSubscriptionId();
+        and: 'list of predicates'
+            def predicates = cmNotificationSubscriptionNcmpInEvent.getData().getPredicates();
+        when: 'a valid event object loaded in cache'
+            objectUnderTest.add(subscriptionId, predicates)
+        then: 'the cache contains the correct entry with #subscriptionId subscription ID'
+            assert testCache.containsKey(subscriptionId)
+    }
+
+    def 'Create map for DMI cm notification subscription per DMI service name'() {
+        given: 'list of predicates from the create subscription event'
+            def predicates = cmNotificationSubscriptionNcmpInEvent.getData().getPredicates()
+        when: 'method to create map of DMI cm notification subscription per DMI service name is called'
+            def result = objectUnderTest.createDmiCmNotificationSubscriptionsPerDmi(predicates)
+        then: 'the result size of resulting map is correct to the number of DMIs'
+            assert result.size() == 2
+        and: 'the cache objects per DMI exists'
+            def resultMapForDmi1 = result.get('dmi-1')
+            def resultMapForDmi2 = result.get('dmi-2')
+            assert resultMapForDmi1 != null
+            assert resultMapForDmi2 != null
+        and: 'the size of predicates in each object is correct'
+            assert resultMapForDmi1.dmiCmNotificationSubscriptionPredicates.size() == 2
+            assert resultMapForDmi2.dmiCmNotificationSubscriptionPredicates.size() == 2
+        and: 'the subscription status in each object is correct'
+            assert resultMapForDmi1.cmNotificationSubscriptionStatus.toString() == 'PENDING'
+            assert resultMapForDmi2.cmNotificationSubscriptionStatus.toString() == 'PENDING'
+        and: 'the target cmHandles for each predicate is correct'
+            assert resultMapForDmi1.dmiCmNotificationSubscriptionPredicates[0].targetCmHandleIds == ['ch1'].toSet()
+            assert resultMapForDmi1.dmiCmNotificationSubscriptionPredicates[1].targetCmHandleIds == ['ch3'].toSet()
+
+            assert resultMapForDmi2.dmiCmNotificationSubscriptionPredicates[0].targetCmHandleIds == ['ch2'].toSet()
+            assert resultMapForDmi2.dmiCmNotificationSubscriptionPredicates[1].targetCmHandleIds == ['ch4'].toSet()
+        and: 'the list of xpath for each is correct'
+            assert resultMapForDmi1.dmiCmNotificationSubscriptionPredicates[0].xpaths
+                    && resultMapForDmi2.dmiCmNotificationSubscriptionPredicates[0].xpaths == ['/x1/y1','x2/y2'].toSet()
+
+            assert resultMapForDmi1.dmiCmNotificationSubscriptionPredicates[1].xpaths
+                    && resultMapForDmi2.dmiCmNotificationSubscriptionPredicates[1].xpaths == ['/x3/y3','x4/y4'].toSet()
+    }
+
+    def 'Get map for cm handle IDs by DMI service name'() {
+        given: 'the predicate from the test request CM subscription event'
+            def targetFilter = cmNotificationSubscriptionNcmpInEvent.getData().getPredicates().get(0).getTargetFilter()
+        when: 'the method to group all target CM handles by DMI service name is called'
+            def mapOfCMHandleIDsByDmi = objectUnderTest.groupTargetCmHandleIdsByDmi(targetFilter)
+        then: 'the size of the resulting map is correct'
+            assert mapOfCMHandleIDsByDmi.size() == 2
+        and: 'the values in the map is as expected'
+            assert mapOfCMHandleIDsByDmi.get('dmi-1') == ['ch1'].toSet()
+            assert mapOfCMHandleIDsByDmi.get('dmi-2') == ['ch2'].toSet()
+    }
+
+    def setUpTestEvent(){
+        def jsonData = TestUtils.getResourceFileContent('cmSubscription/cmNotificationSubscriptionNcmpInEvent.json')
+        def testEventSent = jsonObjectMapper.convertJsonString(jsonData, CmNotificationSubscriptionNcmpInEvent.class)
+        def testCloudEventSent = CloudEventBuilder.v1()
+                .withData(objectMapper.writeValueAsBytes(testEventSent))
+                .withId('subscriptionCreated')
+                .withType('subscriptionCreated')
+                .withSource(URI.create('some-resource'))
+                .withExtension('correlationid', 'test-cmhandle1').build()
+        def consumerRecord = new ConsumerRecord<String, CloudEvent>('topic-name', 0, 0, 'event-key', testCloudEventSent)
+        def cloudEvent = consumerRecord.value()
+
+        cmNotificationSubscriptionNcmpInEvent = toTargetEvent(cloudEvent, CmNotificationSubscriptionNcmpInEvent.class);
+    }
+
+    def initialiseMockInventoryPersistenceResponses(){
+        mockInventoryPersistence.getYangModelCmHandles(['ch1','ch2'])
+                >> [yangModelCmHandle1, yangModelCmHandle2]
+
+        mockInventoryPersistence.getYangModelCmHandles(['ch3','ch4'])
+                >> [yangModelCmHandle3, yangModelCmHandle4]
+    }
+
+}
\ No newline at end of file
diff --git a/cps-ncmp-service/src/test/resources/cmSubscription/cmNotificationSubscriptionNcmpInEvent.json b/cps-ncmp-service/src/test/resources/cmSubscription/cmNotificationSubscriptionNcmpInEvent.json
new file mode 100644
index 0000000..09796e2
--- /dev/null
+++ b/cps-ncmp-service/src/test/resources/cmSubscription/cmNotificationSubscriptionNcmpInEvent.json
@@ -0,0 +1,21 @@
+{
+  "data": {
+    "subscriptionId": "cm-subscription-001",
+    "predicates": [
+      {
+        "targetFilter":  ["ch1","ch2"],
+        "scopeFilter": {
+          "datastore": "ncmp-datastore:passthrough-operational",
+          "xpath-filter": ["/x1/y1","x2/y2"]
+        }
+      },
+      {
+        "targetFilter":  ["ch3","ch4"],
+        "scopeFilter": {
+          "datastore": "ncmp-datastore:passthrough-operational",
+          "xpath-filter": ["/x3/y3","x4/y4"]
+        }
+      }
+    ]
+  }
+}
\ No newline at end of file
diff --git a/cps-ncmp-service/src/test/resources/cmSubscription/cmSubscriptionNcmpInEvent.json b/cps-ncmp-service/src/test/resources/cmSubscription/cmSubscriptionNcmpInEvent.json
deleted file mode 100644
index 5246618..0000000
--- a/cps-ncmp-service/src/test/resources/cmSubscription/cmSubscriptionNcmpInEvent.json
+++ /dev/null
@@ -1,23 +0,0 @@
-{
-  "data": {
-    "subscriptionId": "cm-subscription-001",
-    "predicates": [
-      {
-        "targetFilter": [
-          "CMHandle1",
-          "CMHandle2",
-          "CMHandle3"
-        ],
-        "scopeFilter": {
-          "datastore": "ncmp-datastore:passthrough-running",
-          "xpath-filter": [
-            "//_3gpp-nr-nrm-gnbdufunction:GNBDUFunction/_3gpp-nr-nrm-nrcelldu:NRCellDU/",
-            "//_3gpp-nr-nrm-gnbcuupfunction:GNBCUUPFunction//",
-            "//_3gpp-nr-nrm-gnbcucpfunction:GNBCUCPFunction/_3gpp-nr-nrm-nrcelldu:NRCellCU//",
-            "//_3gpp-nr-nrm-nrsectorcarrier:NRSectorCarrier//"
-          ]
-        }
-      }
-    ]
-  }
-}
\ No newline at end of file