diff --git a/extensions/vscode-notebook-tests/src/notebook.test.ts b/extensions/vscode-notebook-tests/src/notebook.test.ts
index 2851fa5c377..ca66acd63b6 100644
--- a/extensions/vscode-notebook-tests/src/notebook.test.ts
+++ b/extensions/vscode-notebook-tests/src/notebook.test.ts
@@ -297,7 +297,7 @@ suite('Notebook API tests', () => {
 			document: vscode.window.activeNotebookEditor!.document,
 			cells: [vscode.window.activeNotebookEditor!.document.cells[0]]
 		});
-		assert.strictEqual(cellOutputsAddedRet.cells[0].outputs2.length, 1);
+		assert.strictEqual(cellOutputsAddedRet.cells[0].outputs.length, 1);
 
 		const cellOutputClear = getEventOncePromise<vscode.NotebookCellOutputsChangeEvent>(vscode.notebook.onDidChangeCellOutputs);
 		await vscode.commands.executeCommand('notebook.cell.clearOutputs');
@@ -306,7 +306,7 @@ suite('Notebook API tests', () => {
 			document: vscode.window.activeNotebookEditor!.document,
 			cells: [vscode.window.activeNotebookEditor!.document.cells[0]]
 		});
-		assert.strictEqual(cellOutputsAddedRet.cells[0].outputs2.length, 0);
+		assert.strictEqual(cellOutputsAddedRet.cells[0].outputs.length, 0);
 
 		// const cellChangeLanguage = getEventOncePromise<vscode.NotebookCellLanguageChangeEvent>(vscode.notebook.onDidChangeCellLanguage);
 		// await vscode.commands.executeCommand('notebook.cell.changeToMarkdown');
@@ -447,10 +447,10 @@ suite('Notebook API tests', () => {
 		const document = vscode.window.activeNotebookEditor?.document!;
 		assert.strictEqual(document.isDirty, true);
 		assert.strictEqual(document.cells.length, 1);
-		assert.strictEqual(document.cells[0].outputs2.length, 1);
+		assert.strictEqual(document.cells[0].outputs.length, 1);
 
 		// consuming is OLD api (for now)
-		const [output] = document.cells[0].outputs2;
+		const [output] = document.cells[0].outputs;
 
 		assert.strictEqual(output.outputs.length, 2);
 		assert.strictEqual(output.outputs[0].mime, 'application/foo');
@@ -475,10 +475,10 @@ suite('Notebook API tests', () => {
 		const document = vscode.window.activeNotebookEditor?.document!;
 		assert.strictEqual(document.isDirty, true);
 		assert.strictEqual(document.cells.length, 1);
-		assert.strictEqual(document.cells[0].outputs2.length, 1);
-		assert.strictEqual(document.cells[0].outputs2[0].outputs.length, 1);
-		assert.strictEqual(document.cells[0].outputs2[0].outputs[0].mime, 'foo');
-		assert.strictEqual(document.cells[0].outputs2[0].outputs[0].value, 'bar');
+		assert.strictEqual(document.cells[0].outputs.length, 1);
+		assert.strictEqual(document.cells[0].outputs[0].outputs.length, 1);
+		assert.strictEqual(document.cells[0].outputs[0].outputs[0].mime, 'foo');
+		assert.strictEqual(document.cells[0].outputs[0].outputs[0].value, 'bar');
 
 		await saveAllFilesAndCloseAll(undefined);
 	});
@@ -500,10 +500,10 @@ suite('Notebook API tests', () => {
 		assert.strictEqual(value.document.isDirty, true);
 		assert.strictEqual(value.cells.length, 1);
 		assert.strictEqual(value.document.cells.length, 1);
-		assert.strictEqual(value.document.cells[0].outputs2.length, 1);
-		assert.strictEqual(value.document.cells[0].outputs2[0].outputs.length, 1);
-		assert.strictEqual(value.document.cells[0].outputs2[0].outputs[0].mime, 'foo');
-		assert.strictEqual(value.document.cells[0].outputs2[0].outputs[0].value, 'bar');
+		assert.strictEqual(value.document.cells[0].outputs.length, 1);
+		assert.strictEqual(value.document.cells[0].outputs[0].outputs.length, 1);
+		assert.strictEqual(value.document.cells[0].outputs[0].outputs[0].mime, 'foo');
+		assert.strictEqual(value.document.cells[0].outputs[0].outputs[0].value, 'bar');
 
 		await saveAllFilesAndCloseAll(undefined);
 	});
@@ -916,21 +916,21 @@ suite('notebook workflow', () => {
 
 		await vscode.commands.executeCommand('notebook.focusTop');
 		const cell = editor.document.cells[0];
-		assert.strictEqual(cell.outputs2.length, 0);
+		assert.strictEqual(cell.outputs.length, 0);
 
 		let metadataChangeEvent = getEventOncePromise<vscode.NotebookCellMetadataChangeEvent>(vscode.notebook.onDidChangeCellMetadata);
 		await updateCellMetadata(resource, cell, { ...cell.metadata, runnable: false });
 		await metadataChangeEvent;
 
 		await vscode.commands.executeCommand('notebook.cell.execute');
-		assert.strictEqual(cell.outputs2.length, 0, 'should not execute'); // not runnable, didn't work
+		assert.strictEqual(cell.outputs.length, 0, 'should not execute'); // not runnable, didn't work
 
 		metadataChangeEvent = getEventOncePromise<vscode.NotebookCellMetadataChangeEvent>(vscode.notebook.onDidChangeCellMetadata);
 		await updateCellMetadata(resource, cell, { ...cell.metadata, runnable: true });
 		await metadataChangeEvent;
 
 		await vscode.commands.executeCommand('notebook.cell.execute');
-		assert.strictEqual(cell.outputs2.length, 1, 'should execute'); // runnable, it worked
+		assert.strictEqual(cell.outputs.length, 1, 'should execute'); // runnable, it worked
 
 		await vscode.commands.executeCommand('workbench.action.files.save');
 		await vscode.commands.executeCommand('workbench.action.closeActiveEditor');
@@ -944,7 +944,7 @@ suite('notebook workflow', () => {
 		const editor = vscode.window.activeNotebookEditor!;
 
 		const cell = editor.document.cells[0];
-		assert.strictEqual(cell.outputs2.length, 0);
+		assert.strictEqual(cell.outputs.length, 0);
 
 		await withEvent(vscode.notebook.onDidChangeNotebookDocumentMetadata, async event => {
 			updateNotebookMetadata(editor.document.uri, { ...editor.document.metadata, runnable: false });
@@ -952,7 +952,7 @@ suite('notebook workflow', () => {
 		});
 
 		await vscode.commands.executeCommand('notebook.execute');
-		assert.strictEqual(cell.outputs2.length, 0, 'should not execute'); // not runnable, didn't work
+		assert.strictEqual(cell.outputs.length, 0, 'should not execute'); // not runnable, didn't work
 
 		await withEvent(vscode.notebook.onDidChangeNotebookDocumentMetadata, async event => {
 			updateNotebookMetadata(editor.document.uri, { ...editor.document.metadata, runnable: true });
@@ -962,7 +962,7 @@ suite('notebook workflow', () => {
 		await withEvent<vscode.NotebookCellOutputsChangeEvent>(vscode.notebook.onDidChangeCellOutputs, async (event) => {
 			await vscode.commands.executeCommand('notebook.execute');
 			await event;
-			assert.strictEqual(cell.outputs2.length, 1, 'should execute'); // runnable, it worked
+			assert.strictEqual(cell.outputs.length, 1, 'should execute'); // runnable, it worked
 		});
 
 		await vscode.commands.executeCommand('workbench.action.files.save');
@@ -980,7 +980,7 @@ suite('notebook workflow', () => {
 		const cell = editor.document.cells[0];
 
 		await vscode.commands.executeCommand('notebook.execute');
-		assert.strictEqual(cell.outputs2.length, 0, 'should not execute'); // not runnable, didn't work
+		assert.strictEqual(cell.outputs.length, 0, 'should not execute'); // not runnable, didn't work
 
 		await vscode.commands.executeCommand('workbench.action.files.save');
 		await vscode.commands.executeCommand('workbench.action.closeActiveEditor');
@@ -1002,13 +1002,13 @@ suite('notebook workflow', () => {
 		await withEvent(vscode.notebook.onDidChangeCellOutputs, async (event) => {
 			await vscode.commands.executeCommand('notebook.execute');
 			await event;
-			assert.strictEqual(cell.outputs2.length, 1, 'should execute'); // runnable, it worked
+			assert.strictEqual(cell.outputs.length, 1, 'should execute'); // runnable, it worked
 		});
 
 		await withEvent(vscode.notebook.onDidChangeCellOutputs, async event => {
 			await vscode.commands.executeCommand('notebook.cell.clearOutputs');
 			await event;
-			assert.strictEqual(cell.outputs2.length, 0, 'should clear');
+			assert.strictEqual(cell.outputs.length, 0, 'should clear');
 		});
 
 		const secondResource = await createRandomFile('', undefined, 'second', '.vsctestnb');
@@ -1017,7 +1017,7 @@ suite('notebook workflow', () => {
 		await withEvent<vscode.NotebookCellOutputsChangeEvent>(vscode.notebook.onDidChangeCellOutputs, async (event) => {
 			await vscode.commands.executeCommand('notebook.cell.execute', { start: 0, end: 1 }, resource);
 			await event;
-			assert.strictEqual(cell.outputs2.length, 1, 'should execute'); // runnable, it worked
+			assert.strictEqual(cell.outputs.length, 1, 'should execute'); // runnable, it worked
 			assert.strictEqual(vscode.window.activeNotebookEditor?.document.uri.fsPath, secondResource.fsPath);
 		});
 
@@ -1043,13 +1043,13 @@ suite('notebook workflow', () => {
 		await withEvent<vscode.NotebookCellOutputsChangeEvent>(vscode.notebook.onDidChangeCellOutputs, async (event) => {
 			await vscode.commands.executeCommand('notebook.execute');
 			await event;
-			assert.strictEqual(cell.outputs2.length, 1, 'should execute'); // runnable, it worked
+			assert.strictEqual(cell.outputs.length, 1, 'should execute'); // runnable, it worked
 		});
 
 		const clearChangeEvent = getEventOncePromise<vscode.NotebookCellOutputsChangeEvent>(vscode.notebook.onDidChangeCellOutputs);
 		await vscode.commands.executeCommand('notebook.cell.clearOutputs');
 		await clearChangeEvent;
-		assert.strictEqual(cell.outputs2.length, 0, 'should clear');
+		assert.strictEqual(cell.outputs.length, 0, 'should clear');
 
 		const secondResource = await createRandomFile('', undefined, 'second', '.vsctestnb');
 		await vscode.commands.executeCommand('vscode.openWith', secondResource, 'notebookCoreTest');
@@ -1057,7 +1057,7 @@ suite('notebook workflow', () => {
 		await withEvent<vscode.NotebookCellOutputsChangeEvent>(vscode.notebook.onDidChangeCellOutputs, async (event) => {
 			await vscode.commands.executeCommand('notebook.execute', resource);
 			await event;
-			assert.strictEqual(cell.outputs2.length, 1, 'should execute'); // runnable, it worked
+			assert.strictEqual(cell.outputs.length, 1, 'should execute'); // runnable, it worked
 			assert.strictEqual(vscode.window.activeNotebookEditor?.document.uri.fsPath, secondResource.fsPath);
 		});
 
@@ -1080,19 +1080,19 @@ suite('notebook workflow', () => {
 		await metadataChangeEvent;
 
 		await vscode.commands.executeCommand('notebook.cell.execute');
-		assert.strictEqual(cell.outputs2.length, 1, 'should execute'); // runnable, it worked
-		assert.strictEqual(cell.outputs2[0].outputs.length, 1);
-		assert.strictEqual(cell.outputs2[0].outputs[0].mime, 'text/plain');
-		assert.deepStrictEqual(cell.outputs2[0].outputs[0].value, [
+		assert.strictEqual(cell.outputs.length, 1, 'should execute'); // runnable, it worked
+		assert.strictEqual(cell.outputs[0].outputs.length, 1);
+		assert.strictEqual(cell.outputs[0].outputs[0].mime, 'text/plain');
+		assert.deepStrictEqual(cell.outputs[0].outputs[0].value, [
 			'my output'
 		]);
 
 		await vscode.commands.executeCommand('notebook.selectKernel', { extension: 'vscode.vscode-notebook-tests', id: 'secondaryKernel' });
 		await vscode.commands.executeCommand('notebook.cell.execute');
-		assert.strictEqual(cell.outputs2.length, 1, 'should execute'); // runnable, it worked
-		assert.strictEqual(cell.outputs2[0].outputs.length, 1);
-		assert.strictEqual(cell.outputs2[0].outputs[0].mime, 'text/plain');
-		assert.deepStrictEqual(cell.outputs2[0].outputs[0].value, [
+		assert.strictEqual(cell.outputs.length, 1, 'should execute'); // runnable, it worked
+		assert.strictEqual(cell.outputs[0].outputs.length, 1);
+		assert.strictEqual(cell.outputs[0].outputs[0].mime, 'text/plain');
+		assert.deepStrictEqual(cell.outputs[0].outputs[0].value, [
 			'my second output'
 		]);