diff --git a/packages/backend-test-utils/src/next/wiring/TestBackend.test.ts b/packages/backend-test-utils/src/next/wiring/TestBackend.test.ts
index 6b3f8e270f..488a258388 100644
--- a/packages/backend-test-utils/src/next/wiring/TestBackend.test.ts
+++ b/packages/backend-test-utils/src/next/wiring/TestBackend.test.ts
@@ -16,16 +16,25 @@
 
 import {
   createBackendModule,
+  createExtensionPoint,
   createServiceFactory,
   createServiceRef,
 } from '@backstage/backend-plugin-api';
 import { startTestBackend } from './TestBackend';
 
 describe('TestBackend', () => {
-  it('should get a type error if service implementation does not match', () => {
-    const serviceRef = createServiceRef<{ a: string; b: string }>({ id: 'a' });
-    const backend = startTestBackend({
+  it('should get a type error if service implementation does not match', async () => {
+    type Obj = { a: string; b: string };
+    const serviceRef = createServiceRef<Obj>({ id: 'a' });
+    const extensionPoint1 = createExtensionPoint<Obj>({ id: 'b1' });
+    const extensionPoint2 = createExtensionPoint<Obj>({ id: 'b2' });
+    const extensionPoint3 = createExtensionPoint<Obj>({ id: 'b3' });
+    const extensionPoint4 = createExtensionPoint<Obj>({ id: 'b4' });
+    const extensionPoint5 = createExtensionPoint<Obj>({ id: 'b5' });
+    await startTestBackend({
       services: [
+        // @ts-expect-error
+        [extensionPoint1, { a: 'a' }],
         [serviceRef, { a: 'a' }],
         [serviceRef, { a: 'a', b: 'b' }],
         // @ts-expect-error
@@ -35,8 +44,20 @@ describe('TestBackend', () => {
         // @ts-expect-error
         [serviceRef, { a: 'a', b: 'b', c: 'c' }],
       ],
+      extensionPoints: [
+        // @ts-expect-error
+        [serviceRef, { a: 'a' }],
+        [extensionPoint1, { a: 'a' }],
+        [extensionPoint2, { a: 'a', b: 'b' }],
+        // @ts-expect-error
+        [extensionPoint3, { c: 'c' }],
+        // @ts-expect-error
+        [extensionPoint4, { a: 'a', c: 'c' }],
+        // @ts-expect-error
+        [extensionPoint5, { a: 'a', b: 'b', c: 'c' }],
+      ],
     });
-    expect(backend).toBeDefined();
+    expect(1).toBe(1);
   });
 
   it('should start the test backend', async () => {