diff --git a/packages/ionic-test-app/vite.config.ts b/packages/ionic-test-app/vite.config.ts
index e4d399f56d..ee67b41732 100644
--- a/packages/ionic-test-app/vite.config.ts
+++ b/packages/ionic-test-app/vite.config.ts
@@ -6,34 +6,38 @@ import react from '@vitejs/plugin-react';
 import { defineConfig } from 'vite';
 import fs from 'fs-extra';
 
-async function copyOptionalThemeStyle() {
-  let style = '';
+function copyAdditionalThemeIfPresent() {
   try {
-    const themePackage = await import.meta.resolve('@siemens/ix-brand-theme');
-    const theme = path.join(themePackage.replace('file://', ''), '..', '..');
-
-    fs.copySync(
-      theme,
-      path.join(__dirname, 'public', 'additional-theme', 'ix-brand-theme'),
-      {
-        filter: (src) => {
-          return !src.includes('node_modules');
-        },
-      }
+    const additionalTheme = import.meta.resolve('@siemens/ix-brand-theme');
+    const basePath = path.join(
+      additionalTheme.replace('file://', ''),
+      '..',
+      '..'
+    );
+    const targetPath = path.join(
+      __dirname,
+      'public',
+      'additional-theme',
+      'ix-brand-theme'
     );
+    const distPath = path.join(basePath, 'dist');
+    const loaderPath = path.join(basePath, 'loader');
+
+    fs.ensureDirSync(targetPath);
+
+    fs.copySync(distPath, path.join(targetPath, 'dist'));
+    fs.copySync(loaderPath, path.join(targetPath, 'loader'));
 
     return true;
   } catch (e) {
-    console.warn('Could not resolve ix-brand-theme package');
-    console.error(e);
+    console.log('Skip injecting additional theme');
+    return false;
   }
-
-  return false;
 }
 
 // https://vitejs.dev/config/
 export default defineConfig(async () => {
-  await copyOptionalThemeStyle();
+  copyAdditionalThemeIfPresent();
   return {
     base: './',
     plugins: [react(), legacy()],