diff --git a/src/vs/vscode.proposed.d.ts b/src/vs/vscode.proposed.d.ts
index d4f775ccc45..0b792160eab 100644
--- a/src/vs/vscode.proposed.d.ts
+++ b/src/vs/vscode.proposed.d.ts
@@ -1294,11 +1294,17 @@ declare module 'vscode' {
 		 * The range will always be revealed in the center of the viewport.
 		 */
 		InCenter = 1,
+
 		/**
 		 * If the range is outside the viewport, it will be revealed in the center of the viewport.
 		 * Otherwise, it will be revealed with as little scrolling as possible.
 		 */
 		InCenterIfOutsideViewport = 2,
+
+		/**
+		 * The range will always be revealed at the top of the viewport.
+		 */
+		AtTop = 3
 	}
 
 	export interface NotebookEditor {
diff --git a/src/vs/workbench/api/browser/mainThreadNotebook.ts b/src/vs/workbench/api/browser/mainThreadNotebook.ts
index 4e361ea1fc4..0b4b7f3f55d 100644
--- a/src/vs/workbench/api/browser/mainThreadNotebook.ts
+++ b/src/vs/workbench/api/browser/mainThreadNotebook.ts
@@ -646,14 +646,13 @@ export class MainThreadNotebooks extends Disposable implements MainThreadNoteboo
 
 			switch (revealType) {
 				case NotebookEditorRevealType.Default:
-					notebookEditor.revealInView(cell);
-					break;
+					return notebookEditor.revealCellRangeInView(range);
 				case NotebookEditorRevealType.InCenter:
-					notebookEditor.revealInCenter(cell);
-					break;
+					return notebookEditor.revealInCenter(cell);
 				case NotebookEditorRevealType.InCenterIfOutsideViewport:
-					notebookEditor.revealInCenterIfOutsideViewport(cell);
-					break;
+					return notebookEditor.revealInCenterIfOutsideViewport(cell);
+				case NotebookEditorRevealType.AtTop:
+					return notebookEditor.revealInViewAtTop(cell);
 				default:
 					break;
 			}
diff --git a/src/vs/workbench/api/common/extHost.protocol.ts b/src/vs/workbench/api/common/extHost.protocol.ts
index a5f6d3ed535..4f24459ce50 100644
--- a/src/vs/workbench/api/common/extHost.protocol.ts
+++ b/src/vs/workbench/api/common/extHost.protocol.ts
@@ -754,6 +754,7 @@ export enum NotebookEditorRevealType {
 	Default = 0,
 	InCenter = 1,
 	InCenterIfOutsideViewport = 2,
+	AtTop = 3
 }
 
 export interface INotebookDocumentShowOptions {
diff --git a/src/vs/workbench/api/common/extHostTypes.ts b/src/vs/workbench/api/common/extHostTypes.ts
index e153af8aa46..fbd6592c661 100644
--- a/src/vs/workbench/api/common/extHostTypes.ts
+++ b/src/vs/workbench/api/common/extHostTypes.ts
@@ -2858,7 +2858,8 @@ export enum NotebookCellStatusBarAlignment {
 export enum NotebookEditorRevealType {
 	Default = 0,
 	InCenter = 1,
-	InCenterIfOutsideViewport = 2
+	InCenterIfOutsideViewport = 2,
+	AtTop = 3
 }
 
 
diff --git a/src/vs/workbench/contrib/notebook/browser/notebookBrowser.ts b/src/vs/workbench/contrib/notebook/browser/notebookBrowser.ts
index d06ec99a6b2..b5ed5c132a1 100644
--- a/src/vs/workbench/contrib/notebook/browser/notebookBrowser.ts
+++ b/src/vs/workbench/contrib/notebook/browser/notebookBrowser.ts
@@ -500,11 +500,21 @@ export interface INotebookEditor extends IEditor, ICommonNotebookEditor {
 	 */
 	triggerScroll(event: IMouseWheelEvent): void;
 
+	/**
+	 * The range will be revealed with as little scrolling as possible.
+	 */
+	revealCellRangeInView(range: ICellRange): void;
+
 	/**
 	 * Reveal cell into viewport.
 	 */
 	revealInView(cell: ICellViewModel): void;
 
+	/**
+	 * Reveal cell into the top of viewport.
+	 */
+	revealInViewAtTop(cell: ICellViewModel): void;
+
 	/**
 	 * Reveal cell into viewport center.
 	 */
@@ -614,7 +624,9 @@ export interface INotebookCellList {
 	focusElement(element: ICellViewModel): void;
 	selectElement(element: ICellViewModel): void;
 	getFocusedElements(): ICellViewModel[];
+	revealElementsInView(range: ICellRange): void;
 	revealElementInView(element: ICellViewModel): void;
+	revealElementInViewAtTop(element: ICellViewModel): void;
 	revealElementInCenterIfOutsideViewport(element: ICellViewModel): void;
 	revealElementInCenter(element: ICellViewModel): void;
 	revealElementInCenterIfOutsideViewportAsync(element: ICellViewModel): Promise<void>;
diff --git a/src/vs/workbench/contrib/notebook/browser/notebookEditorWidget.ts b/src/vs/workbench/contrib/notebook/browser/notebookEditorWidget.ts
index f0f93c38438..036f4cb0f25 100644
--- a/src/vs/workbench/contrib/notebook/browser/notebookEditorWidget.ts
+++ b/src/vs/workbench/contrib/notebook/browser/notebookEditorWidget.ts
@@ -1226,10 +1226,18 @@ export class NotebookEditorWidget extends Disposable implements INotebookEditor
 		// this.viewModel!.selectionHandles = [cell.handle];
 	}
 
+	revealCellRangeInView(range: ICellRange) {
+		return this._list.revealElementsInView(range);
+	}
+
 	revealInView(cell: ICellViewModel) {
 		this._list.revealElementInView(cell);
 	}
 
+	revealInViewAtTop(cell: ICellViewModel) {
+		this._list.revealElementInViewAtTop(cell);
+	}
+
 	revealInCenterIfOutsideViewport(cell: ICellViewModel) {
 		this._list.revealElementInCenterIfOutsideViewport(cell);
 	}
diff --git a/src/vs/workbench/contrib/notebook/browser/view/notebookCellList.ts b/src/vs/workbench/contrib/notebook/browser/view/notebookCellList.ts
index 8de660ff484..8d0c6a5422a 100644
--- a/src/vs/workbench/contrib/notebook/browser/view/notebookCellList.ts
+++ b/src/vs/workbench/contrib/notebook/browser/view/notebookCellList.ts
@@ -547,6 +547,22 @@ export class NotebookCellList extends WorkbenchList<CellViewModel> implements ID
 		return viewIndexInfo.index;
 	}
 
+	private _getViewIndexUpperBound2(modelIndex: number) {
+		if (!this.hiddenRangesPrefixSum) {
+			return modelIndex;
+		}
+
+		const viewIndexInfo = this.hiddenRangesPrefixSum.getIndexOf(modelIndex);
+
+		if (viewIndexInfo.remainder !== 0) {
+			if (modelIndex >= this.hiddenRangesPrefixSum.getTotalValue()) {
+				return modelIndex - (this.hiddenRangesPrefixSum.getTotalValue() - this.hiddenRangesPrefixSum.getCount());
+			}
+		}
+
+		return viewIndexInfo.index;
+	}
+
 	focusElement(cell: ICellViewModel) {
 		const index = this._getViewIndexUpperBound(cell);
 
@@ -587,6 +603,46 @@ export class NotebookCellList extends WorkbenchList<CellViewModel> implements ID
 		super.setFocus(indexes, browserEvent);
 	}
 
+	revealElementsInView(range: ICellRange) {
+		const startIndex = this._getViewIndexUpperBound2(range.start);
+
+		if (startIndex < 0) {
+			return;
+		}
+
+		const endIndex = this._getViewIndexUpperBound2(range.end);
+
+		const scrollTop = this.getViewScrollTop();
+		const wrapperBottom = this.getViewScrollBottom();
+		const elementTop = this.view.elementTop(startIndex);
+		if (elementTop >= scrollTop
+			&& elementTop < wrapperBottom) {
+			// start element is visible
+			// check end
+
+			const endElementTop = this.view.elementTop(endIndex);
+			const endElementHeight = this.view.elementHeight(endIndex);
+
+			if (endElementTop >= wrapperBottom) {
+				return this._revealInternal(startIndex, false, CellRevealPosition.Top);
+			}
+
+			if (endElementTop < wrapperBottom) {
+				// end element partially visible
+				if (endElementTop + endElementHeight - wrapperBottom < elementTop - scrollTop) {
+					// there is enough space to just scroll up a little bit to make the end element visible
+					return this.view.setScrollTop(scrollTop + endElementTop + endElementHeight - wrapperBottom);
+				} else {
+					// don't even try it
+					return this._revealInternal(startIndex, false, CellRevealPosition.Top);
+				}
+			}
+		}
+
+
+		this._revealInView(startIndex);
+	}
+
 	revealElementInView(cell: ICellViewModel) {
 		const index = this._getViewIndexUpperBound(cell);
 
@@ -595,6 +651,14 @@ export class NotebookCellList extends WorkbenchList<CellViewModel> implements ID
 		}
 	}
 
+	revealElementInViewAtTop(cell: ICellViewModel) {
+		const index = this._getViewIndexUpperBound(cell);
+
+		if (index >= 0) {
+			this._revealInternal(index, false, CellRevealPosition.Top);
+		}
+	}
+
 	revealElementInCenterIfOutsideViewport(cell: ICellViewModel) {
 		const index = this._getViewIndexUpperBound(cell);
 
diff --git a/src/vs/workbench/contrib/notebook/common/model/notebookTextModel.ts b/src/vs/workbench/contrib/notebook/common/model/notebookTextModel.ts
index ff58b2ef751..9ee463274b7 100644
--- a/src/vs/workbench/contrib/notebook/common/model/notebookTextModel.ts
+++ b/src/vs/workbench/contrib/notebook/common/model/notebookTextModel.ts
@@ -275,7 +275,7 @@ export class NotebookTextModel extends Disposable implements INotebookTextModel
 
 		const mainCells = cells.map(cell => {
 			const cellHandle = this._cellhandlePool++;
-			const cellUri = CellUri.generate(this.uri, cellHandle);
+			const cellUri = CellUri.generate(this.uri, this.viewType, cellHandle);
 			return new NotebookCellTextModel(cellUri, cellHandle, cell.source, cell.language, cell.cellKind, cell.outputs || [], cell.metadata, this.transientOptions, this._modelService);
 		});
 
@@ -425,7 +425,7 @@ export class NotebookTextModel extends Disposable implements INotebookTextModel
 		// prepare add
 		const cells = cellDtos.map(cellDto => {
 			const cellHandle = this._cellhandlePool++;
-			const cellUri = CellUri.generate(this.uri, cellHandle);
+			const cellUri = CellUri.generate(this.uri, this.viewType, cellHandle);
 			const cell = new NotebookCellTextModel(
 				cellUri, cellHandle,
 				cellDto.source, cellDto.language, cellDto.cellKind, cellDto.outputs || [], cellDto.metadata, this.transientOptions,
diff --git a/src/vs/workbench/contrib/notebook/common/notebookCommon.ts b/src/vs/workbench/contrib/notebook/common/notebookCommon.ts
index a2f99da121d..cbc5b9938ee 100644
--- a/src/vs/workbench/contrib/notebook/common/notebookCommon.ts
+++ b/src/vs/workbench/contrib/notebook/common/notebookCommon.ts
@@ -467,7 +467,7 @@ export function getCellUndoRedoComparisonKey(uri: URI) {
 		return uri.toString();
 	}
 
-	return data.notebook.toString();
+	return `vt=${data.viewType}&uri=data.notebook.toString()`;
 }
 
 
@@ -477,10 +477,11 @@ export namespace CellUri {
 
 	const _regex = /^ch(\d{7,})/;
 
-	export function generate(notebook: URI, handle: number): URI {
+	export function generate(notebook: URI, viewType: string, handle: number): URI {
 		return notebook.with({
 			scheme,
-			fragment: `ch${handle.toString().padStart(7, '0')}${notebook.scheme !== Schemas.file ? notebook.scheme : ''}`
+			fragment: `ch${handle.toString().padStart(7, '0')}${notebook.scheme !== Schemas.file ? notebook.scheme : ''}`,
+			query: `vt=${viewType}`
 		});
 	}
 
@@ -492,7 +493,7 @@ export namespace CellUri {
 		});
 	}
 
-	export function parse(cell: URI): { notebook: URI, handle: number } | undefined {
+	export function parse(cell: URI): { notebook: URI, handle: number, viewType: string } | undefined {
 		if (cell.scheme !== scheme) {
 			return undefined;
 		}
@@ -505,8 +506,10 @@ export namespace CellUri {
 			handle,
 			notebook: cell.with({
 				scheme: cell.fragment.substr(match[0].length) || Schemas.file,
-				fragment: null
-			})
+				fragment: null,
+				query: null
+			}),
+			viewType: cell.query.substr('vt='.length)
 		};
 	}
 }
diff --git a/src/vs/workbench/contrib/notebook/test/notebookCommon.test.ts b/src/vs/workbench/contrib/notebook/test/notebookCommon.test.ts
index 38a91a236ce..2104ef1586d 100644
--- a/src/vs/workbench/contrib/notebook/test/notebookCommon.test.ts
+++ b/src/vs/workbench/contrib/notebook/test/notebookCommon.test.ts
@@ -336,11 +336,12 @@ suite('CellUri', function () {
 		const nb = URI.parse('foo:///bar/følder/file.nb');
 		const id = 17;
 
-		const data = CellUri.generate(nb, id);
+		const data = CellUri.generate(nb, 'test', id);
 		const actual = CellUri.parse(data);
 		assert.ok(Boolean(actual));
 		assert.equal(actual?.handle, id);
 		assert.equal(actual?.notebook.toString(), nb.toString());
+		assert.equal(actual?.viewType, 'test');
 	});
 
 	test('parse, generate (foo-scheme)', function () {
@@ -348,10 +349,11 @@ suite('CellUri', function () {
 		const nb = URI.parse('foo:///bar/følder/file.nb');
 		const id = 17;
 
-		const data = CellUri.generate(nb, id);
+		const data = CellUri.generate(nb, 'test', id);
 		const actual = CellUri.parse(data);
 		assert.ok(Boolean(actual));
 		assert.equal(actual?.handle, id);
 		assert.equal(actual?.notebook.toString(), nb.toString());
+		assert.equal(actual?.viewType, 'test');
 	});
 });
diff --git a/src/vs/workbench/contrib/notebook/test/testNotebookEditor.ts b/src/vs/workbench/contrib/notebook/test/testNotebookEditor.ts
index fa820f8fb9d..0d12ec2f4b6 100644
--- a/src/vs/workbench/contrib/notebook/test/testNotebookEditor.ts
+++ b/src/vs/workbench/contrib/notebook/test/testNotebookEditor.ts
@@ -47,7 +47,7 @@ export class TestCell extends NotebookCellTextModel {
 		outputs: IProcessedOutput[],
 		modelService: ITextModelService
 	) {
-		super(CellUri.generate(URI.parse('test:///fake/notebook'), handle), handle, source, language, cellKind, outputs, undefined, { transientMetadata: {}, transientOutputs: false }, modelService);
+		super(CellUri.generate(URI.parse('test:///fake/notebook'), viewType, handle), handle, source, language, cellKind, outputs, undefined, { transientMetadata: {}, transientOutputs: false }, modelService);
 	}
 }
 
diff --git a/src/vs/workbench/test/browser/api/extHostNotebook.test.ts b/src/vs/workbench/test/browser/api/extHostNotebook.test.ts
index 9b3a4c2ec2a..e2d51f7cceb 100644
--- a/src/vs/workbench/test/browser/api/extHostNotebook.test.ts
+++ b/src/vs/workbench/test/browser/api/extHostNotebook.test.ts
@@ -62,7 +62,7 @@ suite('NotebookCell#Document', function () {
 				versionId: 0,
 				cells: [{
 					handle: 0,
-					uri: CellUri.generate(notebookUri, 0),
+					uri: CellUri.generate(notebookUri, 'test', 0),
 					source: ['### Heading'],
 					eol: '\n',
 					language: 'markdown',
@@ -70,7 +70,7 @@ suite('NotebookCell#Document', function () {
 					outputs: [],
 				}, {
 					handle: 1,
-					uri: CellUri.generate(notebookUri, 1),
+					uri: CellUri.generate(notebookUri, 'test', 1),
 					source: ['console.log("aaa")', 'console.log("bbb")'],
 					eol: '\n',
 					language: 'javascript',
@@ -167,7 +167,7 @@ suite('NotebookCell#Document', function () {
 					kind: NotebookCellsChangeType.ModelChange,
 					changes: [[0, 0, [{
 						handle: 2,
-						uri: CellUri.generate(notebookUri, 2),
+						uri: CellUri.generate(notebookUri, 'test', 2),
 						source: ['Hello', 'World', 'Hello World!'],
 						eol: '\n',
 						language: 'test',
@@ -175,7 +175,7 @@ suite('NotebookCell#Document', function () {
 						outputs: [],
 					}, {
 						handle: 3,
-						uri: CellUri.generate(notebookUri, 3),
+						uri: CellUri.generate(notebookUri, 'test', 3),
 						source: ['Hallo', 'Welt', 'Hallo Welt!'],
 						eol: '\n',
 						language: 'test',
@@ -284,7 +284,7 @@ suite('NotebookCell#Document', function () {
 				kind: NotebookCellsChangeType.ModelChange,
 				changes: [[0, 0, [{
 					handle: 2,
-					uri: CellUri.generate(notebookUri, 2),
+					uri: CellUri.generate(notebookUri, 'test', 2),
 					source: ['Hello', 'World', 'Hello World!'],
 					eol: '\n',
 					language: 'test',
@@ -292,7 +292,7 @@ suite('NotebookCell#Document', function () {
 					outputs: [],
 				}, {
 					handle: 3,
-					uri: CellUri.generate(notebookUri, 3),
+					uri: CellUri.generate(notebookUri, 'test', 3),
 					source: ['Hallo', 'Welt', 'Hallo Welt!'],
 					eol: '\n',
 					language: 'test',
diff --git a/src/vs/workbench/test/browser/api/extHostNotebookConcatDocument.test.ts b/src/vs/workbench/test/browser/api/extHostNotebookConcatDocument.test.ts
index e49a0c930ef..776543c4fda 100644
--- a/src/vs/workbench/test/browser/api/extHostNotebookConcatDocument.test.ts
+++ b/src/vs/workbench/test/browser/api/extHostNotebookConcatDocument.test.ts
@@ -61,7 +61,7 @@ suite('NotebookConcatDocument', function () {
 				viewType: 'test',
 				cells: [{
 					handle: 0,
-					uri: CellUri.generate(notebookUri, 0),
+					uri: CellUri.generate(notebookUri, 'test', 0),
 					source: ['### Heading'],
 					eol: '\n',
 					language: 'markdown',
@@ -122,8 +122,8 @@ suite('NotebookConcatDocument', function () {
 
 	test('contains', function () {
 
-		const cellUri1 = CellUri.generate(notebook.uri, 1);
-		const cellUri2 = CellUri.generate(notebook.uri, 2);
+		const cellUri1 = CellUri.generate(notebook.uri, 'test', 1);
+		const cellUri2 = CellUri.generate(notebook.uri, 'test', 2);
 
 		extHostNotebooks.$acceptModelChanged(notebookUri, {
 			versionId: notebook.notebookDocument.version + 1,
@@ -169,7 +169,7 @@ suite('NotebookConcatDocument', function () {
 					kind: NotebookCellsChangeType.ModelChange,
 					changes: [[0, 0, [{
 						handle: 1,
-						uri: CellUri.generate(notebook.uri, 1),
+						uri: CellUri.generate(notebook.uri, 'test', 1),
 						source: ['Hello', 'World', 'Hello World!'],
 						eol: '\n',
 						language: 'test',
@@ -177,7 +177,7 @@ suite('NotebookConcatDocument', function () {
 						outputs: [],
 					}, {
 						handle: 2,
-						uri: CellUri.generate(notebook.uri, 2),
+						uri: CellUri.generate(notebook.uri, 'test', 2),
 						source: ['Hallo', 'Welt', 'Hallo Welt!'],
 						eol: '\n',
 						language: 'test',
@@ -214,7 +214,7 @@ suite('NotebookConcatDocument', function () {
 					kind: NotebookCellsChangeType.ModelChange,
 					changes: [[0, 0, [{
 						handle: 1,
-						uri: CellUri.generate(notebook.uri, 1),
+						uri: CellUri.generate(notebook.uri, 'test', 1),
 						source: ['Hello', 'World', 'Hello World!'],
 						eol: '\n',
 						language: 'test',
@@ -241,7 +241,7 @@ suite('NotebookConcatDocument', function () {
 					kind: NotebookCellsChangeType.ModelChange,
 					changes: [[1, 0, [{
 						handle: 2,
-						uri: CellUri.generate(notebook.uri, 2),
+						uri: CellUri.generate(notebook.uri, 'test', 2),
 						source: ['Hallo', 'Welt', 'Hallo Welt!'],
 						eol: '\n',
 						language: 'test',
@@ -292,7 +292,7 @@ suite('NotebookConcatDocument', function () {
 					kind: NotebookCellsChangeType.ModelChange,
 					changes: [[0, 0, [{
 						handle: 1,
-						uri: CellUri.generate(notebook.uri, 1),
+						uri: CellUri.generate(notebook.uri, 'test', 1),
 						source: ['Hello', 'World', 'Hello World!'],
 						eol: '\n',
 						language: 'test',
@@ -300,7 +300,7 @@ suite('NotebookConcatDocument', function () {
 						outputs: [],
 					}, {
 						handle: 2,
-						uri: CellUri.generate(notebook.uri, 2),
+						uri: CellUri.generate(notebook.uri, 'test', 2),
 						source: ['Hallo', 'Welt', 'Hallo Welt!'],
 						eol: '\n',
 						language: 'test',
@@ -350,7 +350,7 @@ suite('NotebookConcatDocument', function () {
 					kind: NotebookCellsChangeType.ModelChange,
 					changes: [[0, 0, [{
 						handle: 1,
-						uri: CellUri.generate(notebook.uri, 1),
+						uri: CellUri.generate(notebook.uri, 'test', 1),
 						source: ['fooLang-document'],
 						eol: '\n',
 						language: 'fooLang',
@@ -358,7 +358,7 @@ suite('NotebookConcatDocument', function () {
 						outputs: [],
 					}, {
 						handle: 2,
-						uri: CellUri.generate(notebook.uri, 2),
+						uri: CellUri.generate(notebook.uri, 'test', 2),
 						source: ['barLang-document'],
 						eol: '\n',
 						language: 'barLang',
@@ -384,7 +384,7 @@ suite('NotebookConcatDocument', function () {
 					kind: NotebookCellsChangeType.ModelChange,
 					changes: [[2, 0, [{
 						handle: 3,
-						uri: CellUri.generate(notebook.uri, 3),
+						uri: CellUri.generate(notebook.uri, 'test', 3),
 						source: ['barLang-document2'],
 						eol: '\n',
 						language: 'barLang',
@@ -422,7 +422,7 @@ suite('NotebookConcatDocument', function () {
 					kind: NotebookCellsChangeType.ModelChange,
 					changes: [[0, 0, [{
 						handle: 1,
-						uri: CellUri.generate(notebook.uri, 1),
+						uri: CellUri.generate(notebook.uri, 'test', 1),
 						source: ['Hello', 'World', 'Hello World!'],
 						eol: '\n',
 						language: 'test',
@@ -430,7 +430,7 @@ suite('NotebookConcatDocument', function () {
 						outputs: [],
 					}, {
 						handle: 2,
-						uri: CellUri.generate(notebook.uri, 2),
+						uri: CellUri.generate(notebook.uri, 'test', 2),
 						source: ['Hallo', 'Welt', 'Hallo Welt!'],
 						eol: '\n',
 						language: 'test',
@@ -479,7 +479,7 @@ suite('NotebookConcatDocument', function () {
 					kind: NotebookCellsChangeType.ModelChange,
 					changes: [[0, 0, [{
 						handle: 1,
-						uri: CellUri.generate(notebook.uri, 1),
+						uri: CellUri.generate(notebook.uri, 'test', 1),
 						source: ['Hello', 'World', 'Hello World!'],
 						eol: '\n',
 						language: 'test',
@@ -487,7 +487,7 @@ suite('NotebookConcatDocument', function () {
 						outputs: [],
 					}, {
 						handle: 2,
-						uri: CellUri.generate(notebook.uri, 2),
+						uri: CellUri.generate(notebook.uri, 'test', 2),
 						source: ['Hallo', 'Welt', 'Hallo Welt!'],
 						eol: '\n',
 						language: 'test',
@@ -520,7 +520,7 @@ suite('NotebookConcatDocument', function () {
 					kind: NotebookCellsChangeType.ModelChange,
 					changes: [[0, 0, [{
 						handle: 1,
-						uri: CellUri.generate(notebook.uri, 1),
+						uri: CellUri.generate(notebook.uri, 'test', 1),
 						source: ['Hello', 'World', 'Hello World!'],
 						eol: '\n',
 						language: 'test',
@@ -528,7 +528,7 @@ suite('NotebookConcatDocument', function () {
 						outputs: [],
 					}, {
 						handle: 2,
-						uri: CellUri.generate(notebook.uri, 2),
+						uri: CellUri.generate(notebook.uri, 'test', 2),
 						source: ['Hallo', 'Welt', 'Hallo Welt!'],
 						eol: '\n',
 						language: 'test',
@@ -558,7 +558,7 @@ suite('NotebookConcatDocument', function () {
 					kind: NotebookCellsChangeType.ModelChange,
 					changes: [[0, 0, [{
 						handle: 1,
-						uri: CellUri.generate(notebook.uri, 1),
+						uri: CellUri.generate(notebook.uri, 'test', 1),
 						source: ['Hello', 'World', 'Hello World!'],
 						eol: '\n',
 						language: 'test',
@@ -566,7 +566,7 @@ suite('NotebookConcatDocument', function () {
 						outputs: [],
 					}, {
 						handle: 2,
-						uri: CellUri.generate(notebook.uri, 2),
+						uri: CellUri.generate(notebook.uri, 'test', 2),
 						source: ['Hallo', 'Welt', 'Hallo Welt!'],
 						eol: '\n',
 						language: 'test',