@@ -123,4 +123,12 @@ test('Should capture an error and transaction for a app router page', async ({ p
 expect(errorEvent.tags?.['my-global-scope-isolated-tag']).not.toBeDefined();
 expect(transactionEvent.tags?.['my-isolated-tag']).toBe(true);
 expect(transactionEvent.tags?.['my-global-scope-isolated-tag']).not.toBeDefined();
+
+// Modules are set for Next.js
+expect(errorEvent.modules).toEqual(
+expect.objectContaining({
+'@sentry/nextjs': expect.any(String),
+'@playwright/test': expect.any(String),
+}),
+);
 });

@@ -0,0 +1,8 @@
+import * as Sentry from '@sentry/node';
+import { loggingTransport } from '@sentry-internal/node-integration-tests';
+
+Sentry.init({
+dsn: 'https://[email protected]/1337',
+release: '1.0',
+transport: loggingTransport,
+});

@@ -0,0 +1,22 @@
+const { loggingTransport } = require('@sentry-internal/node-integration-tests');
+const Sentry = require('@sentry/node');
+
+Sentry.init({
+dsn: 'https://[email protected]/1337',
+release: '1.0',
+transport: loggingTransport,
+});
+
+// express must be required after Sentry is initialized
+const express = require('express');
+const { startExpressServerAndSendPortToRunner } = require('@sentry-internal/node-integration-tests');
+
+const app = express();
+
+app.get('/test1', () => {
+throw new Error('error_1');
+});
+
+Sentry.setupExpressErrorHandler(app);
+
+startExpressServerAndSendPortToRunner(app);

@@ -0,0 +1,13 @@
+import * as Sentry from '@sentry/node';
+import { startExpressServerAndSendPortToRunner } from '@sentry-internal/node-integration-tests';
+import express from 'express';
+
+const app = express();
+
+app.get('/test1', () => {
+throw new Error('error_1');
+});
+
+Sentry.setupExpressErrorHandler(app);
+
+startExpressServerAndSendPortToRunner(app);

@@ -0,0 +1,48 @@
+import { SDK_VERSION } from '@sentry/core';
+import { join } from 'path';
+import { afterAll, describe, test } from 'vitest';
+import { cleanupChildProcesses, createRunner } from '../../utils/runner';
+
+describe('modulesIntegration', () => {
+afterAll(() => {
+cleanupChildProcesses();
+});
+
+test('CJS', async () => {
+const runner = createRunner(__dirname, 'server.js')
+.withMockSentryServer()
+.expect({
+event: {
+modules: {
+// exact version comes from require.caches
+express: '4.21.1',
+// this comes from package.json
+'@sentry/node': SDK_VERSION,
+yargs: '^16.2.0',
+},
+},
+})
+.start();
+runner.makeRequest('get', '/test1', { expectError: true });
+await runner.completed();
+});
+
+test('ESM', async () => {
+const runner = createRunner(__dirname, 'server.mjs')
+.withInstrument(join(__dirname, 'instrument.mjs'))
+.withMockSentryServer()
+.expect({
+event: {
+modules: {
+// this comes from package.json
+express: '^4.21.1',
+'@sentry/node': SDK_VERSION,
+yargs: '^16.2.0',
+},
+},
+})
+.start();
+runner.makeRequest('get', '/test1', { expectError: true });
+await runner.completed();
+});
+});

@@ -40,10 +40,6 @@ import { defaultStackParser, getSentryRelease } from './api';
 import { NodeClient } from './client';
 import { initOpenTelemetry, maybeInitializeEsmLoader } from './initOtel';
 
-function getCjsOnlyIntegrations(): Integration[] {
-return isCjs() ? [modulesIntegration()] : [];
-}
-
 /**
 * Get default integrations, excluding performance.
 */
@@ -69,7 +65,7 @@ export function getDefaultIntegrationsWithoutPerformance(): Integration[] {
 nodeContextIntegration(),
 childProcessIntegration(),
 processSessionIntegration(),
-...getCjsOnlyIntegrations(),
+modulesIntegration(),
 ];
 }