diff --git a/extensions/vscode-api-tests/src/singlefolder-tests/workspace.test.ts b/extensions/vscode-api-tests/src/singlefolder-tests/workspace.test.ts
index a6b277c57a1..ac9e4bc9edc 100644
--- a/extensions/vscode-api-tests/src/singlefolder-tests/workspace.test.ts
+++ b/extensions/vscode-api-tests/src/singlefolder-tests/workspace.test.ts
@@ -1159,7 +1159,7 @@ suite('vscode API - workspace', () => {
 		assert.ok(edt === vscode.window.activeTextEditor);
 
 		const we = new vscode.WorkspaceEdit();
-		we.replace(document.uri, new vscode.Range(0, 0, 0, 0), new vscode.SnippetString('${1:foo}${2:bar}'));
+		we.set(document.uri, [new vscode.SnippetTextEdit(new vscode.Range(0, 0, 0, 0), new vscode.SnippetString('${1:foo}${2:bar}'))]);
 		const success = await vscode.workspace.applyEdit(we);
 		if (edt !== vscode.window.activeTextEditor) {
 			return this.skip();
diff --git a/src/vs/workbench/api/common/extHost.api.impl.ts b/src/vs/workbench/api/common/extHost.api.impl.ts
index 6729f902156..1d5ea634ddd 100644
--- a/src/vs/workbench/api/common/extHost.api.impl.ts
+++ b/src/vs/workbench/api/common/extHost.api.impl.ts
@@ -1287,6 +1287,7 @@ export function createApiFactoryAndRegisterActors(accessor: ServicesAccessor): I
 			TerminalProfile: extHostTypes.TerminalProfile,
 			TextDocumentSaveReason: extHostTypes.TextDocumentSaveReason,
 			TextEdit: extHostTypes.TextEdit,
+			SnippetTextEdit: extHostTypes.SnippetTextEdit,
 			TextEditorCursorStyle: TextEditorCursorStyle,
 			TextEditorLineNumbersStyle: extHostTypes.TextEditorLineNumbersStyle,
 			TextEditorRevealType: extHostTypes.TextEditorRevealType,
diff --git a/src/vs/workbench/api/common/extHostTypes.ts b/src/vs/workbench/api/common/extHostTypes.ts
index 238a0be8e0b..6f221cce9c6 100644
--- a/src/vs/workbench/api/common/extHostTypes.ts
+++ b/src/vs/workbench/api/common/extHostTypes.ts
@@ -655,6 +655,29 @@ export class NotebookEdit implements vscode.NotebookEdit {
 	}
 }
 
+export class SnippetTextEdit implements vscode.SnippetTextEdit {
+
+	static isSnippetTextEdit(thing: any): thing is SnippetTextEdit {
+		if (thing instanceof SnippetTextEdit) {
+			return true;
+		}
+		if (!thing) {
+			return false;
+		}
+		return Range.isRange((<SnippetTextEdit>thing).range)
+			&& SnippetString.isSnippetString((<SnippetTextEdit>thing).snippet);
+	}
+
+	range: Range;
+
+	snippet: SnippetString;
+
+	constructor(range: Range, snippet: SnippetString) {
+		this.range = range;
+		this.snippet = snippet;
+	}
+}
+
 export interface IFileOperationOptions {
 	overwrite?: boolean;
 	ignoreIfExists?: boolean;
@@ -758,12 +781,8 @@ export class WorkspaceEdit implements vscode.WorkspaceEdit {
 
 	// --- text
 
-	replace(uri: URI, range: Range, newText: string | vscode.SnippetString, metadata?: vscode.WorkspaceEditEntryMetadata): void {
-		if (typeof newText === 'string') {
-			this._edits.push({ _type: FileEditType.Text, uri, edit: new TextEdit(range, newText), metadata });
-		} else {
-			this._edits.push({ _type: FileEditType.Snippet, uri, range, edit: newText, metadata });
-		}
+	replace(uri: URI, range: Range, newText: string, metadata?: vscode.WorkspaceEditEntryMetadata): void {
+		this._edits.push({ _type: FileEditType.Text, uri, edit: new TextEdit(range, newText), metadata });
 	}
 
 	insert(resource: URI, position: Position, newText: string, metadata?: vscode.WorkspaceEditEntryMetadata): void {
@@ -792,7 +811,7 @@ export class WorkspaceEdit implements vscode.WorkspaceEdit {
 			coalesceInPlace(this._edits);
 		} else {
 			// append edit to the end
-			for (const edit of edits as TextEdit[] | NotebookEdit[]) {
+			for (const edit of edits as TextEdit[] | NotebookEdit[] | SnippetTextEdit[]) {
 				if (edit) {
 					if (NotebookEdit.isNotebookCellEdit(edit)) {
 						if (edit.newCellMetadata) {
@@ -802,6 +821,9 @@ export class WorkspaceEdit implements vscode.WorkspaceEdit {
 						} else {
 							this.replaceNotebookCells(uri, edit.range, edit.newCells);
 						}
+					} else if (SnippetTextEdit.isSnippetTextEdit(edit)) {
+						this._edits.push({ _type: FileEditType.Snippet, uri, range: edit.range, edit: edit.snippet });
+
 					} else {
 						this._edits.push({ _type: FileEditType.Text, uri, edit });
 					}
diff --git a/src/vscode-dts/vscode.proposed.snippetWorkspaceEdit.d.ts b/src/vscode-dts/vscode.proposed.snippetWorkspaceEdit.d.ts
index 46c485216c2..81d9be445df 100644
--- a/src/vscode-dts/vscode.proposed.snippetWorkspaceEdit.d.ts
+++ b/src/vscode-dts/vscode.proposed.snippetWorkspaceEdit.d.ts
@@ -7,9 +7,38 @@ declare module 'vscode' {
 
 	// https://github.com/microsoft/vscode/issues/145374
 
+	// TODO@API - WorkspaceEditEntryMetadata
+
+	export class SnippetTextEdit {
+
+		/**
+		 * The range this edit applies to.
+		 */
+		range: Range;
+
+		/**
+		 * The {@link SnippetString snippet} this edit will perform.
+		 */
+		snippet: SnippetString;
+
+		/**
+		 * Create a new snippet edit.
+		 *
+		 * @param range A range.
+		 * @param snippet A snippet string.
+		 */
+		constructor(range: Range, snippet: SnippetString);
+	}
+
 	interface WorkspaceEdit {
 
-		// todo@API have a SnippetTextEdit and allow to set that?
-		replace(uri: Uri, range: Range, newText: string | SnippetString, metadata?: WorkspaceEditEntryMetadata): void;
+		/**
+		 * Set (and replace) edits for a resource.
+		 *
+		 * @param uri A resource identifier.
+		 * @param edits An array of edits.
+		 */
+		// TODO@API we support mixed edits of TextEdit and SnippetTextEdit
+		set(uri: Uri, edits: TextEdit[] | SnippetTextEdit[] | NotebookEdit[]): void;
 	}
 }