diff --git a/tools/modern-tests/assertions.js b/tools/modern-tests/assertions.js
index 6080888a98..b4be00b2b3 100644
--- a/tools/modern-tests/assertions.js
+++ b/tools/modern-tests/assertions.js
@@ -2,6 +2,9 @@
  * This file contains assertion helpers for testing Meteor applications.
  */
 
+import fs from 'fs-extra';
+import path from 'path';
+
 /**
  * Helper function to assert that a Meteor React app is running correctly
  * @param {number} port - Port where the app is running
@@ -38,3 +41,75 @@ export async function assertRspackScriptTag(port, shoudlExist = true) {
   const hasRspackScript = scriptTags.some(src => src && src.includes('__rspack__'));
   expect(hasRspackScript).toBe(shoudlExist);
 }
+
+/**
+ * Helper function to assert that a single file exists and optionally contains specific content
+ * @param {string} tempDir - Path to the temporary directory
+ * @param {string} filePath - File path relative to tempDir
+ * @param {Object} options - Additional options
+ * @param {string} options.content - Content to check for
+ * @param {boolean} options.exactMatch - Whether the content should be an exact match (default: false)
+ * @param {number} options.timeout - Maximum time to wait in milliseconds (default: 5000)
+ * @param {number} options.checkInterval - Interval between checks in milliseconds (default: 100)
+ * @returns {Promise<void>}
+ */
+export async function assertFileExist(tempDir, filePath, options = {}) {
+  const { content, exactMatch = false, timeout = 5000, checkInterval = 100 } = options;
+  const fullPath = path.join(tempDir, filePath);
+
+  const startTime = Date.now();
+
+  // Function to check file existence and content
+  const checkFile = async () => {
+    // Check if file exists
+    const fileExists = await fs.pathExists(fullPath);
+
+    if (!fileExists) {
+      // If file doesn't exist and we haven't exceeded the timeout, wait and retry
+      if (Date.now() - startTime < timeout) {
+        await new Promise(resolve => setTimeout(resolve, checkInterval));
+        return checkFile();
+      }
+      // If we've exceeded the timeout, fail the test
+      expect(fileExists).toBe(true);
+      return false;
+    }
+
+    // If content check is requested
+    if (content) {
+      // Read the file content
+      const fileContent = await fs.readFile(fullPath, 'utf8');
+
+      if (exactMatch) {
+        // Check for exact match
+        if (fileContent !== content) {
+          // If content doesn't match and we haven't exceeded the timeout, wait and retry
+          if (Date.now() - startTime < timeout) {
+            await new Promise(resolve => setTimeout(resolve, checkInterval));
+            return checkFile();
+          }
+          // If we've exceeded the timeout, fail the test
+          expect(fileContent).toBe(content);
+          return false;
+        }
+      } else {
+        // Check if file includes the specified content
+        if (!fileContent.includes(content)) {
+          // If content doesn't include the specified content and we haven't exceeded the timeout, wait and retry
+          if (Date.now() - startTime < timeout) {
+            await new Promise(resolve => setTimeout(resolve, checkInterval));
+            return checkFile();
+          }
+          // If we've exceeded the timeout, fail the test
+          expect(fileContent).toContain(content);
+          return false;
+        }
+      }
+    }
+
+    return true;
+  };
+
+  // Start checking
+  await checkFile();
+}
diff --git a/tools/modern-tests/react.test.js b/tools/modern-tests/react.test.js
index df16bde0f0..a73cfbbe7c 100644
--- a/tools/modern-tests/react.test.js
+++ b/tools/modern-tests/react.test.js
@@ -7,7 +7,7 @@ import {
   createMeteorApp,
   runMeteorCommand, wait
 } from "./helpers";
-import { assertMeteorReactApp, assertRspackScriptTag } from './assertions';
+import { assertMeteorReactApp, assertRspackScriptTag, assertFileExist } from './assertions';
 import fs from 'fs-extra';
 import path from 'path';
 import waitOn from "wait-on";
@@ -16,6 +16,11 @@ describe('React App Bundling', () => {
   describe.skip('Meteor Creator', () => {
     const PORT = 3100;
 
+    beforeAll(async () => {
+      // Ensure any process on the port is killed
+      await killProcessByPort(PORT);
+    });
+
     test('"meteor create" should create a new Meteor app with --react example', async () => {
       // Create a new Meteor app with --react example
       const result = await createMeteorApp('react', 'react');
@@ -64,6 +69,9 @@ describe('React App Bundling', () => {
     let tempDir;
 
     beforeAll(async () => {
+      // Ensure any process on the port is killed
+      await killProcessByPort(PORT);
+
       // Setup the Meteor app
       tempDir = (await setupMeteorApp('react'))?.tempDir;
     });
@@ -120,6 +128,10 @@ describe('React App Bundling', () => {
       // Wait for a margin
       await wait(500);
 
+      // Assert that the config files exists
+      await assertFileExist(tempDir, '.gitignore', { content: '_build' });
+      await assertFileExist(tempDir, 'rspack.config.js', { content: '@meteorjs/rspack' });
+
       // Kill the meteor process
       await killMeteorProcess(meteorProcess);
 
@@ -138,6 +150,14 @@ describe('React App Bundling', () => {
       // Wait for a margin
       await wait(500);
 
+      // Assert that the app files exists
+      await assertFileExist(tempDir, '_build/main-dev/client-entry.js');
+      await assertFileExist(tempDir, '_build/main-dev/client-rspack.js');
+      await assertFileExist(tempDir, '_build/main-dev/client-meteor.js');
+      await assertFileExist(tempDir, '_build/main-dev/server-entry.js');
+      await assertFileExist(tempDir, '_build/main-dev/server-rspack.js');
+      await assertFileExist(tempDir, '_build/main-dev/server-meteor.js');
+
       // Assert that the Meteor React app is running correctly
       await assertMeteorReactApp(PORT);
 
@@ -163,6 +183,16 @@ describe('React App Bundling', () => {
       // Wait for a margin
       await wait(500);
 
+      // Assert that the app files exists
+      await assertFileExist(tempDir, '_build/main-prod/client-entry.js');
+      await assertFileExist(tempDir, '_build/main-prod/client-rspack.js');
+      await assertFileExist(tempDir, '_build/main-prod/client-meteor.js');
+      await assertFileExist(tempDir, '_build/main-prod/server-entry.js');
+      await assertFileExist(tempDir, '_build/main-prod/server-rspack.js');
+      await assertFileExist(tempDir, '_build/main-prod/server-meteor.js');
+
+      await assertFileExist(tempDir, 'server/main.js');
+
       // Assert that the Meteor React app is running correctly
       await assertMeteorReactApp(PORT);