diff --git a/src/vs/workbench/api/common/extHostTypes.ts b/src/vs/workbench/api/common/extHostTypes.ts
index a1c2a3ea107..b5e2cd04ef9 100644
--- a/src/vs/workbench/api/common/extHostTypes.ts
+++ b/src/vs/workbench/api/common/extHostTypes.ts
@@ -807,6 +807,8 @@ export class WorkspaceEdit implements vscode.WorkspaceEdit {
 					if (NotebookEdit.isNotebookCellEdit(edit)) {
 						if (edit.newCellMetadata) {
 							this.replaceNotebookCellMetadata(uri, edit.range.start, edit.newCellMetadata);
+						} else if (edit.newNotebookMetadata) {
+							this.replaceNotebookMetadata(uri, edit.newNotebookMetadata);
 						} else {
 							this.replaceNotebookCells(uri, edit.range, edit.newCells);
 						}