diff --git a/packages/bruno-app/src/components/Sidebar/Collections/Collection/CollectionItem/CloneCollectionItem/index.js b/packages/bruno-app/src/components/Sidebar/Collections/Collection/CollectionItem/CloneCollectionItem/index.js
index 31e328dd2..427042fb4 100644
--- a/packages/bruno-app/src/components/Sidebar/Collections/Collection/CollectionItem/CloneCollectionItem/index.js
+++ b/packages/bruno-app/src/components/Sidebar/Collections/Collection/CollectionItem/CloneCollectionItem/index.js
@@ -3,7 +3,7 @@ import toast from 'react-hot-toast';
 import { useFormik } from 'formik';
 import * as Yup from 'yup';
 import Modal from 'components/Modal';
-import { useDispatch } from 'react-redux';
+import { useDispatch, useSelector } from 'react-redux';
 import { isItemAFolder } from 'utils/tabs';
 import { cloneItem } from 'providers/ReduxStore/slices/collections/actions';
 import { IconArrowBackUp, IconEdit, IconCaretDown } from '@tabler/icons';
@@ -18,6 +18,7 @@ import Button from 'ui/Button';
 
 const CloneCollectionItem = ({ collectionUid, item, onClose }) => {
   const dispatch = useDispatch();
+  const collection = useSelector((state) => state.collections.collections?.find((c) => c.uid === collectionUid));
   const isFolder = isItemAFolder(item);
   const inputRef = useRef();
   const [isEditing, toggleEditing] = useState(false);
@@ -168,7 +169,7 @@ const CloneCollectionItem = ({ collectionUid, item, onClose }) => {
                       onChange={formik.handleChange}
                       value={formik.values.filename || ''}
                     />
-                    {itemType !== 'folder' && <span className="absolute right-2 top-4 flex justify-center items-center file-extension">.bru</span>}
+                    {itemType !== 'folder' && <span className="absolute right-2 top-4 flex justify-center items-center file-extension">.{collection?.format || 'bru'}</span>}
                   </div>
                 ) : (
                   <div className="relative flex flex-row gap-1 items-center justify-between">
diff --git a/packages/bruno-app/src/components/Sidebar/Collections/Collection/CollectionItem/RenameCollectionItem/index.js b/packages/bruno-app/src/components/Sidebar/Collections/Collection/CollectionItem/RenameCollectionItem/index.js
index 9103c2189..73c2ddc03 100644
--- a/packages/bruno-app/src/components/Sidebar/Collections/Collection/CollectionItem/RenameCollectionItem/index.js
+++ b/packages/bruno-app/src/components/Sidebar/Collections/Collection/CollectionItem/RenameCollectionItem/index.js
@@ -2,7 +2,7 @@ import React, { useRef, useEffect, useState, forwardRef } from 'react';
 import { useFormik } from 'formik';
 import * as Yup from 'yup';
 import Modal from 'components/Modal';
-import { useDispatch } from 'react-redux';
+import { useDispatch, useSelector } from 'react-redux';
 import { isItemAFolder } from 'utils/tabs';
 import { renameItem, saveRequest, closeTabs } from 'providers/ReduxStore/slices/collections/actions';
 import path from 'utils/common/path';
@@ -18,6 +18,7 @@ import Button from 'ui/Button';
 
 const RenameCollectionItem = ({ collectionUid, item, onClose }) => {
   const dispatch = useDispatch();
+  const collection = useSelector((state) => state.collections.collections?.find((c) => c.uid === collectionUid));
   const isFolder = isItemAFolder(item);
   const inputRef = useRef();
   const [isEditing, toggleEditing] = useState(false);
@@ -168,6 +169,7 @@ const RenameCollectionItem = ({ collectionUid, item, onClose }) => {
                       size={16}
                       strokeWidth={1.5}
                       onClick={() => toggleEditing(true)}
+                      data-testid="rename-request-edit-icon"
                     />
                   )}
                 </div>
@@ -186,7 +188,7 @@ const RenameCollectionItem = ({ collectionUid, item, onClose }) => {
                       onChange={formik.handleChange}
                       value={formik.values.filename || ''}
                     />
-                    {itemType !== 'folder' && <span className="absolute right-2 top-4 flex justify-center items-center file-extension">.bru</span>}
+                    {itemType !== 'folder' && <span className="absolute right-2 top-4 flex justify-center items-center file-extension">.{collection?.format || 'bru'}</span>}
                   </div>
                 ) : (
                   <div className="relative flex flex-row gap-1 items-center justify-between">
diff --git a/tests/sidebar/rename-collection-item.spec.ts b/tests/sidebar/rename-collection-item.spec.ts
new file mode 100644
index 000000000..44eaa3ef4
--- /dev/null
+++ b/tests/sidebar/rename-collection-item.spec.ts
@@ -0,0 +1,45 @@
+import { test, expect } from '../../playwright';
+import { buildCommonLocators, createCollection, createRequest, closeAllCollections } from '../utils/page';
+
+test.describe('Rename Collection Item - File Extension', () => {
+  test.afterEach(async ({ page }) => {
+    await closeAllCollections(page);
+  });
+
+  test('should show .yml extension for OpenCollection format when renaming a request', async ({ page, createTmpDir }) => {
+    const locators = buildCommonLocators(page);
+    const testDir = await createTmpDir('yml-rename-test');
+
+    // Create a collection with OpenCollection (YAML) format
+    await test.step('Create collection with OpenCollection format', async () => {
+      await createCollection(page, 'YML Rename Test', testDir);
+    });
+
+    // Create a request inside the collection
+    await createRequest(page, 'Test Request', 'YML Rename Test');
+
+    // Open rename dialog via context menu
+    await test.step('Open rename dialog and verify .yml extension', async () => {
+      await locators.sidebar.request('Test Request').hover();
+      await locators.actions.collectionItemActions('Test Request').click();
+      await locators.dropdown.item('Rename').click();
+
+      const renameModal = page.locator('.bruno-modal').filter({ hasText: 'Rename Request' });
+      await renameModal.waitFor({ state: 'visible' });
+
+      // Show filesystem name via Options dropdown
+      await renameModal.locator('.btn-advanced').click();
+      await page.locator('.dropdown-item').filter({ hasText: 'Show Filesystem Name' }).click();
+
+      // Click the IconEdit SVG to enable filename editing
+      await renameModal.getByTestId('rename-request-edit-icon').click();
+
+      // Verify the extension shows .yml, not .bru
+      const extensionLabel = renameModal.locator('.file-extension');
+      await expect(extensionLabel).toHaveText('.yml');
+
+      // Close the rename modal
+      await renameModal.getByRole('button', { name: 'Cancel' }).click();
+    });
+  });
+});