diff --git a/src/client/repl/nativeRepl.ts b/src/client/repl/nativeRepl.ts
index 3f8a085da467..7f82edc9dda1 100644
--- a/src/client/repl/nativeRepl.ts
+++ b/src/client/repl/nativeRepl.ts
@@ -63,7 +63,7 @@ export class NativeRepl implements Disposable {
     }
 
     dispose(): void {
-        this.disposables.forEach((d) => d.dispose());
+        this.disposables.forEach((d) => d?.dispose());
     }
 
     /**
diff --git a/src/client/repl/replController.ts b/src/client/repl/replController.ts
index f30b8d9cbf6f..7d5ede2367b4 100644
--- a/src/client/repl/replController.ts
+++ b/src/client/repl/replController.ts
@@ -23,12 +23,13 @@ export function createReplController(
             const exec = controller.createNotebookCellExecution(cell);
             exec.start(Date.now());
 
-            const result = await server.execute(cell.document.getText());
+            const code = cell.document.getText();
+            const result = await server.execute(code);
 
             if (result?.output) {
-                exec.replaceOutput([
-                    new vscode.NotebookCellOutput([vscode.NotebookCellOutputItem.text(result.output, 'text/plain')]),
-                ]);
+                const stdoutItem = vscode.NotebookCellOutputItem.stdout(result.output);
+                const output = new vscode.NotebookCellOutput([stdoutItem], {});
+                exec.replaceOutput([output]);
                 // TODO: Properly update via NotebookCellOutputItem.error later.
             }
 
diff --git a/src/test/repl/nativeRepl.test.ts b/src/test/repl/nativeRepl.test.ts
index 2cf18cefe1f7..0e674aa80d4d 100644
--- a/src/test/repl/nativeRepl.test.ts
+++ b/src/test/repl/nativeRepl.test.ts
@@ -5,6 +5,7 @@
 /* eslint-disable @typescript-eslint/no-explicit-any */
 import * as TypeMoq from 'typemoq';
 import * as sinon from 'sinon';
+import * as vscode from 'vscode';
 import { Disposable, EventEmitter, NotebookDocument, Uri } from 'vscode';
 import { expect } from 'chai';
 
@@ -114,6 +115,63 @@ suite('REPL - Native REPL', () => {
         expect(createReplControllerStub.calledOnce).to.be.true;
     });
 
+    test('createReplController should publish stdout notebook output for REPL execution', async () => {
+        const mockServer = {
+            interrupt: sinon.stub(),
+            execute: sinon.stub().resolves({ status: true, output: 'hello\nworld' }),
+            dispose: sinon.stub(),
+        } as any;
+        const createPythonServerStub = sinon.stub(PythonServer, 'createPythonServer').returns(mockServer as any);
+
+        const replaceOutputStub = sinon.stub();
+        const execStub = {
+            start: sinon.stub(),
+            replaceOutput: replaceOutputStub,
+            end: sinon.stub(),
+        } as any;
+
+        const createNotebookCellExecutionStub = sinon.stub().returns(execStub);
+        const mockNotebookController = ({
+            id: 'mockController',
+            dispose: sinon.stub(),
+            updateNotebookAffinity: sinon.stub(),
+            createNotebookCellExecution: createNotebookCellExecutionStub,
+            supportedLanguages: [] as string[],
+            description: '',
+            interruptHandler: undefined,
+            executeHandler: undefined,
+        } as any) as vscode.NotebookController;
+
+        sinon.stub(vscode.notebooks, 'createNotebookController').returns(mockNotebookController);
+        createReplControllerStub.restore();
+
+        const disposables: Disposable[] = [];
+        try {
+            const controller = replController.createReplController('python', disposables, '/cwd');
+
+            const mockTextDocument = { getText: sinon.stub().returns('print("hi")') } as any;
+            const mockCell = { document: mockTextDocument } as any;
+            await (controller.executeHandler as any)([mockCell]);
+
+            expect(createPythonServerStub.calledOnce).to.be.true;
+            expect(mockServer.execute.calledOnceWithExactly('print("hi")')).to.be.true;
+            expect(createNotebookCellExecutionStub.calledOnce).to.be.true;
+            expect(replaceOutputStub.calledOnce).to.be.true;
+
+            const outputs = replaceOutputStub.firstCall.args[0] as vscode.NotebookCellOutput[];
+            expect(outputs).to.have.lengthOf(1);
+            const output = outputs[0];
+            expect(output.items).to.have.lengthOf(1);
+            expect(output.items[0].mime).to.equal('application/vnd.code.notebook.stdout');
+            expect((output.items[0] as any).metadata).to.be.undefined;
+            expect(output.metadata).to.deep.equal({});
+            const outputText = Buffer.from((output.items[0] as any).data).toString();
+            expect(outputText).to.equal('hello\nworld');
+        } finally {
+            disposables.forEach((disposable) => disposable.dispose());
+        }
+    });
+
     test('watchNotebookClosed should clean up resources when notebook is closed', async () => {
         const notebookCloseEmitter = new EventEmitter<NotebookDocument>();
         sinon.stub(vscodeWorkspaceApis, 'onDidCloseNotebookDocument').callsFake((handler) => {
diff --git a/src/test/repl/replCommand.test.ts b/src/test/repl/replCommand.test.ts
index 0b5edda863f9..f0bc2dcbb10f 100644
--- a/src/test/repl/replCommand.test.ts
+++ b/src/test/repl/replCommand.test.ts
@@ -1,6 +1,6 @@
 // Create test suite and test cases for the `replUtils` module
 import * as TypeMoq from 'typemoq';
-import { commands, Disposable, Uri } from 'vscode';
+import { commands, Disposable, Uri, window } from 'vscode';
 import * as sinon from 'sinon';
 import { expect } from 'chai';
 import { IInterpreterService } from '../../client/interpreter/contracts';
@@ -163,6 +163,7 @@ suite('REPL - register native repl command', () => {
 
         expect(commandHandler).not.to.be.an('undefined', 'Command handler not initialized');
 
+        sinon.stub(window, 'activeTextEditor').get(() => undefined);
         await commandHandler!('uri');
         sinon.assert.calledOnce(getNativeReplStub);
     });
diff --git a/src/test/vscode-mock.ts b/src/test/vscode-mock.ts
index ac64384520cf..d644db906e54 100644
--- a/src/test/vscode-mock.ts
+++ b/src/test/vscode-mock.ts
@@ -41,6 +41,32 @@ export function initialize() {
     generateMock('debug');
     generateMock('scm');
     generateMock('notebooks');
+    (mockedVSCode.commands as any).executeCommand = () => Promise.resolve(undefined);
+    (mockedVSCode.notebooks as any).createNotebookController = () => {
+        throw new Error('createNotebookController must be stubbed in tests that use it.');
+    };
+    when(mockedVSCodeNamespaces.window!.tabGroups).thenReturn({
+        all: [],
+        get activeTabGroup(): vscode.TabGroup {
+            throw new Error('activeTabGroup must be stubbed in tests that use it.');
+        },
+        onDidChangeTabGroups: new vscodeMocks.EventEmitter<any>().event,
+        onDidChangeTabs: new vscodeMocks.EventEmitter<any>().event,
+        close: () => Promise.resolve(true),
+    });
+
+    // Notebook output helpers used by REPL tests.
+    (mockedVSCode as any).NotebookCellOutputItem = {
+        stdout: (value: string) => ({ mime: 'application/vnd.code.notebook.stdout', data: Buffer.from(value) }),
+    };
+    (mockedVSCode as any).NotebookCellOutput = class {
+        public items: any[];
+        public metadata?: any;
+        constructor(items: any[], metadata?: any) {
+            this.items = items;
+            this.metadata = metadata;
+        }
+    };
 
     // Use mock clipboard fo testing purposes.
     const clipboard = new MockClipboard();