diff --git a/src/vs/workbench/contrib/notebook/test/testNotebookEditor.ts b/src/vs/workbench/contrib/notebook/test/testNotebookEditor.ts
index 18c0edd1d6c35902c2f379d8056ceef27806d489..5ddd9ddaaf5e4133e6a0dd038822a40a834940ad 100644
--- a/src/vs/workbench/contrib/notebook/test/testNotebookEditor.ts
+++ b/src/vs/workbench/contrib/notebook/test/testNotebookEditor.ts
@@ -90,6 +90,10 @@ export class TestNotebookEditor implements INotebookEditor {
 
 	constructor(
 	) { }
+
+	setSelection(cell: CellViewModel, selection: Range): void {
+		throw new Error('Method not implemented.');
+	}
 	revealRangeInView(cell: CellViewModel, range: Range): void {
 		throw new Error('Method not implemented.');
 	}