diff --git a/packages/case-core/src/__tests__/server/http/connectors/web/index.ts b/packages/case-core/src/__tests__/server/http/connectors/web/index.ts
index 7e8e88d4..f9d906f2 100644
--- a/packages/case-core/src/__tests__/server/http/connectors/web/index.ts
+++ b/packages/case-core/src/__tests__/server/http/connectors/web/index.ts
@@ -8,7 +8,7 @@ import type { Dependencies } from '../../domain/types';
 import { userRepo } from '../users/defaultUserRepository';
 
 const app = express();
-const PORT = 8282; // default port to listen
+const PORT = 8289; // default port to listen
 
 const defaultDependencies: Dependencies = {
   baseService,
diff --git a/packages/case-core/src/__tests__/server/http/index.ts b/packages/case-core/src/__tests__/server/http/index.ts
index 95733e9c..cd2ecd68 100644
--- a/packages/case-core/src/__tests__/server/http/index.ts
+++ b/packages/case-core/src/__tests__/server/http/index.ts
@@ -1,4 +1,4 @@
 import type * as http from 'http';
 import start from './connectors/web';
 
-export default (): Promise<http.Server> => start();
+export default (port: number): Promise<http.Server> => start(port);
diff --git a/packages/case-core/src/index.http.response.internals.spec.ts b/packages/case-core/src/index.http.response.internals.spec.ts
index fac35dec..349b4415 100644
--- a/packages/case-core/src/index.http.response.internals.spec.ts
+++ b/packages/case-core/src/index.http.response.internals.spec.ts
@@ -15,6 +15,8 @@ import { WritingCaseContract } from './core';
 import { writerDependencies } from './connectors/dependencies';
 import { defaultPrinter } from './__tests__/jest/defaultTestPrinter';
 
+const PORT = 8084;
+
 const expectErrorContaining = async (
   context: Promise<unknown>,
   expectedContent: string,
@@ -83,7 +85,7 @@ describe('simple get endpoint', () => {
     } = {
       mockConfig: {
         http: {
-          baseUrlUnderTest: `http://localhost:8282`,
+          baseUrlUnderTest: `http://localhost:${PORT}`,
         },
       },
       contractMode: 'read',
@@ -110,7 +112,7 @@ describe('simple get endpoint', () => {
     describe('with a running server', () => {
       let server: http.Server;
       beforeAll(async () => {
-        server = await start();
+        server = await start(PORT);
       });
       afterAll(() => {
         const closePromise = new Promise<void>((resolve) => {
diff --git a/packages/contract-case-jest/src/__tests__/server/http/index.ts b/packages/contract-case-jest/src/__tests__/server/http/index.ts
index 094320ae..6e6eafcf 100644
--- a/packages/contract-case-jest/src/__tests__/server/http/index.ts
+++ b/packages/contract-case-jest/src/__tests__/server/http/index.ts
@@ -1,4 +1,4 @@
 import type * as http from 'http';
 import start from './connectors/web/index.js';
 
-export default (): Promise<http.Server> => start();
+export default (port: number): Promise<http.Server> => start(port);