diff --git a/src/features/views/treeViewItems.ts b/src/features/views/treeViewItems.ts
index ea7c20f5..ba7a51ba 100644
--- a/src/features/views/treeViewItems.ts
+++ b/src/features/views/treeViewItems.ts
@@ -65,6 +65,7 @@ export class EnvManagerTreeItem implements EnvTreeItem {
     public readonly parent: undefined;
     constructor(public readonly manager: InternalEnvironmentManager) {
         const item = new TreeItem(manager.displayName, TreeItemCollapsibleState.Collapsed);
+        item.id = manager.id;
         item.contextValue = this.getContextValue();
         item.description = manager.description;
         item.tooltip = manager.tooltip ?? manager.description;
@@ -88,6 +89,7 @@ export class PythonGroupEnvTreeItem implements EnvTreeItem {
     ) {
         const label = typeof group === 'string' ? group : group.name;
         const item = new TreeItem(label, TreeItemCollapsibleState.Collapsed);
+        item.id = `${this.parent.manager.id}:${label}`;
         item.contextValue = `pythonEnvGroup;${this.parent.manager.id}:${label};`;
         this.treeItem = item;
 
@@ -127,6 +129,7 @@ export class PythonEnvTreeItem implements EnvTreeItem {
         }
 
         const item = new TreeItem(name, TreeItemCollapsibleState.Collapsed);
+        item.id = environment.envId.id;
         item.contextValue = this.getContextValue();
 
         // Build description with optional [uv] indicator and disambiguation suffix
diff --git a/src/test/features/views/treeViewItems.unit.test.ts b/src/test/features/views/treeViewItems.unit.test.ts
index 738f8398..f35f39ae 100644
--- a/src/test/features/views/treeViewItems.unit.test.ts
+++ b/src/test/features/views/treeViewItems.unit.test.ts
@@ -4,6 +4,7 @@ import {
     EnvManagerTreeItem,
     getEnvironmentParentDirName,
     PythonEnvTreeItem,
+    PythonGroupEnvTreeItem,
 } from '../../../features/views/treeViewItems';
 import { InternalEnvironmentManager, PythonEnvironmentImpl } from '../../../internal.api';
 
@@ -73,6 +74,17 @@ function createMockManager(
 
 suite('Test TreeView Items', () => {
     suite('EnvManagerTreeItem', () => {
+        test('Sets id to manager id for tree item identification', () => {
+            // Arrange
+            const manager = createMockManager({ id: 'ms-python.python:venv' });
+
+            // Act
+            const item = new EnvManagerTreeItem(manager);
+
+            // Assert
+            assert.strictEqual(item.treeItem.id, 'ms-python.python:venv');
+        });
+
         test('Context value excludes create when manager does not support it', () => {
             // Arrange
             const manager = createMockManager({ supportsCreate: false });
@@ -127,6 +139,20 @@ suite('Test TreeView Items', () => {
             managerWithRemove = new EnvManagerTreeItem(createMockManager({ supportsRemove: true }));
         });
 
+        test('Sets id to environment id for tree item identification', () => {
+            // Arrange
+            const env = createMockEnvironment({
+                id: 'unique-env-id-123',
+                environmentPath: '/home/user/envs/.venv/bin/python',
+            });
+
+            // Act
+            const item = new PythonEnvTreeItem(env, managerWithoutRemove);
+
+            // Assert
+            assert.strictEqual(item.treeItem.id, 'unique-env-id-123');
+        });
+
         test('Context value excludes remove and activatable when not supported', () => {
             // Arrange
             const env = createMockEnvironment({
@@ -242,6 +268,60 @@ suite('Test TreeView Items', () => {
         });
     });
 
+    suite('PythonGroupEnvTreeItem', () => {
+        let parentManager: EnvManagerTreeItem;
+
+        setup(() => {
+            parentManager = new EnvManagerTreeItem(createMockManager({ id: 'ms-python.python:conda' }));
+        });
+
+        test('Sets id combining manager id and group name for tree item identification', () => {
+            // Arrange & Act
+            const item = new PythonGroupEnvTreeItem(parentManager, 'base');
+
+            // Assert
+            assert.strictEqual(item.treeItem.id, 'ms-python.python:conda:base');
+        });
+
+        test('Sets id correctly when group is EnvironmentGroupInfo object', () => {
+            // Arrange
+            const groupInfo = { name: 'dev-envs', description: 'Development environments' };
+
+            // Act
+            const item = new PythonGroupEnvTreeItem(parentManager, groupInfo);
+
+            // Assert
+            assert.strictEqual(item.treeItem.id, 'ms-python.python:conda:dev-envs');
+        });
+
+        test('Uses string group as label', () => {
+            // Arrange & Act
+            const item = new PythonGroupEnvTreeItem(parentManager, 'my-group');
+
+            // Assert
+            assert.strictEqual(item.treeItem.label, 'my-group');
+        });
+
+        test('Uses group name from EnvironmentGroupInfo as label', () => {
+            // Arrange
+            const groupInfo = { name: 'production', description: 'Production environments' };
+
+            // Act
+            const item = new PythonGroupEnvTreeItem(parentManager, groupInfo);
+
+            // Assert
+            assert.strictEqual(item.treeItem.label, 'production');
+        });
+
+        test('Sets contextValue with manager id and group name', () => {
+            // Arrange & Act
+            const item = new PythonGroupEnvTreeItem(parentManager, 'test-group');
+
+            // Assert
+            assert.strictEqual(item.treeItem.contextValue, 'pythonEnvGroup;ms-python.python:conda:test-group;');
+        });
+    });
+
     suite('getEnvironmentParentDirName', () => {
         test('Extracts parent folder from Unix path with bin directory', () => {
             // Arrange