diff --git a/tests/webhooks/serviceConversationListener.test.ts b/tests/webhooks/serviceConversationListener.test.ts
new file mode 100644
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+++ b/tests/webhooks/serviceConversationListener.test.ts
@@ -0,0 +1,139 @@
+/**
+ * Copyright (C) 2021-2023 Technology Matters
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see https://www.gnu.org/licenses/.
+ */
+
+import { ServerlessCallback } from '@twilio-labs/serverless-runtime-types/types';
+import { Event as Body } from '../../functions/helpers/sendErrorMessageForUnsupportedMedia.private';
+import { handler as serviceConversationListener } from '../../functions/webhooks/serviceConversationListener.protected';
+import helpers, { MockedResponse } from '../helpers';
+
+const baseContext = {
+  getTwilioClient: (): any => ({
+    conversations: {
+      conversations: {
+        get: () => {},
+      },
+    },
+  }),
+  DOMAIN_NAME: 'serverless',
+  CHAT_SERVICE_SID: 'chatService',
+  SYNC_SERVICE_SID: 'SYNC_SERVICE_SID',
+  PATH: 'PATH',
+  SERVICE_SID: undefined,
+  ENVIRONMENT_SID: undefined,
+};
+
+describe('serviceConversationListener', () => {
+  beforeAll(() => {
+    const runtime = new helpers.MockRuntime(baseContext);
+    // eslint-disable-next-line no-underscore-dangle
+    runtime._addFunction(
+      'helpers/sendErrorMessageForUnsupportedMedia',
+      'functions/helpers/sendErrorMessageForUnsupportedMedia.private',
+    );
+    helpers.setup({}, runtime);
+  });
+  afterAll(() => {
+    helpers.teardown();
+  });
+
+  test('Should return status 400 if Body, Media or EventType are undefined', async () => {
+    const event1: Body = {
+      Body: undefined,
+      ConversationSid: 'CHxxxxxxx34EWS',
+      EventType: 'onMessageAdded',
+      Media: {},
+      DateCreated: new Date(),
+    };
+
+    const event2: Body = {
+      Body: 'Test word',
+      ConversationSid: 'CHxxxxxxx34EWS',
+      EventType: 'onMessageAdded',
+      Media: undefined,
+      DateCreated: new Date(),
+    };
+
+    const event3: Body = {
+      Body: 'Test word',
+      ConversationSid: 'CHxxxxxxx34EWS',
+      EventType: undefined,
+      Media: {},
+      DateCreated: new Date(),
+    };
+
+    const callback: ServerlessCallback = (err, result) => {
+      expect(result).toBeDefined();
+      const response = result as MockedResponse;
+      expect(response.getStatus()).toBe(400);
+    };
+
+    await serviceConversationListener(baseContext, event1, callback);
+    await serviceConversationListener(baseContext, event2, callback);
+    await serviceConversationListener(baseContext, event3, callback);
+  });
+
+  test('Should return status 500 if object response is undefined', async () => {
+    const event1: Body = {
+      Body: 'Test word',
+      ConversationSid: 'CHxxxxxxx34EWS',
+      EventType: 'onMessageAdded',
+      Media: {},
+      DateCreated: new Date(),
+    };
+
+    const callback1: ServerlessCallback = (err, result) => {
+      expect(result).toBeDefined();
+      const response = result as MockedResponse;
+      expect(response.getStatus()).toBe(500);
+    };
+
+    await serviceConversationListener({ ...baseContext }, event1, callback1);
+
+    const event2: Body = {
+      Body: 'Test word',
+      ConversationSid: 'CHxxxxxxx34EWS',
+      EventType: 'onMessageAdded',
+      Media: {},
+      DateCreated: new Date(),
+    };
+
+    const callback2: ServerlessCallback = (err, result) => {
+      expect(result).toBeDefined();
+      const response = result as MockedResponse;
+      expect(response.getStatus()).toBe(500);
+    };
+
+    await serviceConversationListener(baseContext, event2, callback2);
+  });
+
+  test('Should return status 200', async () => {
+    const event1: Body = {
+      Body: 'Test word',
+      ConversationSid: 'CHxxxxxxx34EWS',
+      EventType: 'onMessageAdded',
+      Media: {},
+      DateCreated: new Date(),
+    };
+
+    const callback1: ServerlessCallback = (err, result) => {
+      expect(result).toBeDefined();
+      const response = result as MockedResponse;
+      expect(response.getStatus()).toBe(200);
+    };
+
+    await serviceConversationListener(baseContext, event1, callback1);
+  });
+});