diff --git a/packages/node/test/integrations/undici.test.ts b/packages/node/test/integrations/undici.test.ts
index bf2169bc3967..f2587f75f463 100644
--- a/packages/node/test/integrations/undici.test.ts
+++ b/packages/node/test/integrations/undici.test.ts
@@ -15,8 +15,8 @@ let hub: Hub;
 let fetch: typeof FetchType;
 
 beforeAll(async () => {
-  await setupTestServer();
   try {
+    await setupTestServer();
     // need to conditionally require `undici` because it's not available in Node 10
     // eslint-disable-next-line @typescript-eslint/no-var-requires
     fetch = require('undici').fetch;
@@ -51,10 +51,10 @@ conditionalTest({ min: 16 })('Undici integration', () => {
   it.each([
     [
       'simple url',
-      'http://localhost:18099',
+      'http://localhost:18100',
       undefined,
       {
-        description: 'GET http://localhost:18099/',
+        description: 'GET http://localhost:18100/',
         op: 'http.client',
         data: expect.objectContaining({
           'http.method': 'GET',
@@ -63,10 +63,10 @@ conditionalTest({ min: 16 })('Undici integration', () => {
     ],
     [
       'url with query',
-      'http://localhost:18099?foo=bar',
+      'http://localhost:18100?foo=bar',
       undefined,
       {
-        description: 'GET http://localhost:18099/',
+        description: 'GET http://localhost:18100/',
         op: 'http.client',
         data: expect.objectContaining({
           'http.method': 'GET',
@@ -76,10 +76,10 @@ conditionalTest({ min: 16 })('Undici integration', () => {
     ],
     [
       'url with POST method',
-      'http://localhost:18099',
+      'http://localhost:18100',
       { method: 'POST' },
       {
-        description: 'POST http://localhost:18099/',
+        description: 'POST http://localhost:18100/',
         data: expect.objectContaining({
           'http.method': 'POST',
         }),
@@ -87,10 +87,10 @@ conditionalTest({ min: 16 })('Undici integration', () => {
     ],
     [
       'url with POST method',
-      'http://localhost:18099',
+      'http://localhost:18100',
       { method: 'POST' },
       {
-        description: 'POST http://localhost:18099/',
+        description: 'POST http://localhost:18100/',
         data: expect.objectContaining({
           'http.method': 'POST',
         }),
@@ -98,10 +98,10 @@ conditionalTest({ min: 16 })('Undici integration', () => {
     ],
     [
       'url with GET as default',
-      'http://localhost:18099',
+      'http://localhost:18100',
       { method: undefined },
       {
-        description: 'GET http://localhost:18099/',
+        description: 'GET http://localhost:18100/',
       },
     ],
   ])('creates a span with a %s', async (_: string, request, requestInit, expected) => {
@@ -182,11 +182,11 @@ conditionalTest({ min: 16 })('Undici integration', () => {
 
     const undoPatch = patchUndici({ shouldCreateSpanForRequest: url => url.includes('yes') });
 
-    await fetch('http://localhost:18099/no', { method: 'POST' });
+    await fetch('http://localhost:18100/no', { method: 'POST' });
 
     expect(transaction.spanRecorder?.spans.length).toBe(1);
 
-    await fetch('http://localhost:18099/yes', { method: 'POST' });
+    await fetch('http://localhost:18100/yes', { method: 'POST' });
 
     expect(transaction.spanRecorder?.spans.length).toBe(2);
 
@@ -200,7 +200,7 @@ conditionalTest({ min: 16 })('Undici integration', () => {
       const transaction = hub.startTransaction({ name: 'test-transaction' }) as Transaction;
       hub.getScope().setSpan(transaction);
 
-      await fetch('http://localhost:18099', { method: 'POST' });
+      await fetch('http://localhost:18100', { method: 'POST' });
 
       expect(transaction.spanRecorder?.spans.length).toBe(2);
       const span = transaction.spanRecorder?.spans[1];
@@ -215,7 +215,7 @@ conditionalTest({ min: 16 })('Undici integration', () => {
   it('attaches the sentry trace and baggage headers if there is no active span', async () => {
     const scope = hub.getScope();
 
-    await fetch('http://localhost:18099', { method: 'POST' });
+    await fetch('http://localhost:18100', { method: 'POST' });
 
     const propagationContext = scope.getPropagationContext();
 
@@ -234,7 +234,7 @@ conditionalTest({ min: 16 })('Undici integration', () => {
 
     const undoPatch = patchUndici({ shouldCreateSpanForRequest: url => url.includes('yes') });
 
-    await fetch('http://localhost:18099/no', { method: 'POST' });
+    await fetch('http://localhost:18100/no', { method: 'POST' });
 
     expect(requestHeaders['sentry-trace']).toBeDefined();
     expect(requestHeaders['baggage']).toBeDefined();
@@ -242,7 +242,7 @@ conditionalTest({ min: 16 })('Undici integration', () => {
     expect(requestHeaders['sentry-trace'].includes(propagationContext.traceId)).toBe(true);
     const firstSpanId = requestHeaders['sentry-trace'].split('-')[1];
 
-    await fetch('http://localhost:18099/yes', { method: 'POST' });
+    await fetch('http://localhost:18100/yes', { method: 'POST' });
 
     expect(requestHeaders['sentry-trace']).toBeDefined();
     expect(requestHeaders['baggage']).toBeDefined();
@@ -264,14 +264,14 @@ conditionalTest({ min: 16 })('Undici integration', () => {
 
     expect(transaction.spanRecorder?.spans.length).toBe(1);
 
-    await fetch('http://localhost:18099/no', { method: 'POST' });
+    await fetch('http://localhost:18100/no', { method: 'POST' });
 
     expect(transaction.spanRecorder?.spans.length).toBe(2);
 
     expect(requestHeaders['sentry-trace']).toBeUndefined();
     expect(requestHeaders['baggage']).toBeUndefined();
 
-    await fetch('http://localhost:18099/yes', { method: 'POST' });
+    await fetch('http://localhost:18100/yes', { method: 'POST' });
 
     expect(transaction.spanRecorder?.spans.length).toBe(3);
 
@@ -290,7 +290,7 @@ conditionalTest({ min: 16 })('Undici integration', () => {
           data: {
             method: 'POST',
             status_code: 200,
-            url: 'http://localhost:18099/',
+            url: 'http://localhost:18100/',
           },
           type: 'http',
           timestamp: expect.any(Number),
@@ -300,7 +300,7 @@ conditionalTest({ min: 16 })('Undici integration', () => {
     });
     hub.bindClient(client);
 
-    await fetch('http://localhost:18099', { method: 'POST' });
+    await fetch('http://localhost:18100', { method: 'POST' });
   });
 
   it('adds a breadcrumb on errored request', async () => {
@@ -336,7 +336,7 @@ conditionalTest({ min: 16 })('Undici integration', () => {
 
     const undoPatch = patchUndici({ breadcrumbs: false });
 
-    await fetch('http://localhost:18099', { method: 'POST' });
+    await fetch('http://localhost:18100', { method: 'POST' });
 
     undoPatch();
   });
@@ -382,7 +382,7 @@ function setupTestServer() {
     res.connection?.end();
   });
 
-  testServer?.listen(18099, 'localhost');
+  testServer?.listen(18100);
 
   return new Promise(resolve => {
     testServer?.on('listening', resolve);