diff --git a/x-pack/plugins/lists/server/services/extension_points/extension_point_storage.mock.ts b/x-pack/plugins/lists/server/services/extension_points/extension_point_storage.mock.ts
index 2a63da494dc3b..47eeee057e072 100644
--- a/x-pack/plugins/lists/server/services/extension_points/extension_point_storage.mock.ts
+++ b/x-pack/plugins/lists/server/services/extension_points/extension_point_storage.mock.ts
@@ -8,6 +8,7 @@
 import { MockedLogger, loggerMock } from '@kbn/logging/mocks';
 
 import { httpServerMock } from '../../../../../../src/core/server/mocks';
+import { ExceptionListClient } from '../exception_lists/exception_list_client';
 
 import { ExtensionPointStorage } from './extension_point_storage';
 import {
@@ -122,6 +123,7 @@ export const createExtensionPointStorageMock = (
 
   return {
     callbackContext: {
+      exceptionListClient: {} as unknown as ExceptionListClient,
       request: httpServerMock.createKibanaRequest(),
     },
     exceptionPreCreate,