diff --git a/extensions/vscode-api-tests/src/singlefolder-tests/languages.test.ts b/extensions/vscode-api-tests/src/singlefolder-tests/languages.test.ts
index 8c407fb6c8b..a59841f6689 100644
--- a/extensions/vscode-api-tests/src/singlefolder-tests/languages.test.ts
+++ b/extensions/vscode-api-tests/src/singlefolder-tests/languages.test.ts
@@ -31,7 +31,7 @@ suite('vscode API - languages', () => {
 		let clock = 0;
 		const disposables: vscode.Disposable[] = [];
 
-		let close = new Promise(resolve => {
+		let close = new Promise<void>(resolve => {
 			disposables.push(vscode.workspace.onDidCloseTextDocument(e => {
 				if (e === doc) {
 					assert.equal(doc.languageId, langIdNow);
@@ -41,7 +41,7 @@ suite('vscode API - languages', () => {
 				}
 			}));
 		});
-		let open = new Promise(resolve => {
+		let open = new Promise<void>(resolve => {
 			disposables.push(vscode.workspace.onDidOpenTextDocument(e => {
 				if (e === doc) { // same instance!
 					assert.equal(doc.languageId, 'json');
diff --git a/extensions/vscode-api-tests/src/singlefolder-tests/window.test.ts b/extensions/vscode-api-tests/src/singlefolder-tests/window.test.ts
index 9187b34e548..3f4fd2366ce 100644
--- a/extensions/vscode-api-tests/src/singlefolder-tests/window.test.ts
+++ b/extensions/vscode-api-tests/src/singlefolder-tests/window.test.ts
@@ -85,7 +85,7 @@ suite('vscode API - window', () => {
 
 			let [one, two] = editors;
 
-			await new Promise(resolve => {
+			await new Promise<void>(resolve => {
 				let registration2 = window.onDidChangeTextEditorViewColumn(event => {
 					actualEvent = event;
 					registration2.dispose();
@@ -120,7 +120,7 @@ suite('vscode API - window', () => {
 			let [, two] = editors;
 			two.show();
 
-			return new Promise(resolve => {
+			return new Promise<void>(resolve => {
 
 				let registration2 = window.onDidChangeTextEditorViewColumn(event => {
 					actualEvents.push(event);
@@ -433,7 +433,7 @@ suite('vscode API - window', () => {
 		let i = 0;
 		const resolves: ((value: string) => void)[] = [];
 		let done: () => void;
-		const unexpected = new Promise((resolve, reject) => {
+		const unexpected = new Promise<void>((resolve, reject) => {
 			done = () => resolve();
 			resolves.push(reject);
 		});
@@ -594,7 +594,7 @@ suite('vscode API - window', () => {
 	function createQuickPickTracker<T extends string | QuickPickItem>() {
 		const resolves: ((value: T) => void)[] = [];
 		let done: () => void;
-		const unexpected = new Promise((resolve, reject) => {
+		const unexpected = new Promise<void>((resolve, reject) => {
 			done = () => resolve();
 			resolves.push(reject);
 		});
@@ -613,7 +613,7 @@ suite('vscode API - window', () => {
 		return workspace.openTextDocument(join(workspace.rootPath || '', './far.js')).then(doc => window.showTextDocument(doc)).then(editor => {
 
 
-			return new Promise((resolve, _reject) => {
+			return new Promise<void>((resolve, _reject) => {
 
 				let subscription = window.onDidChangeTextEditorSelection(e => {
 					assert.ok(e.textEditor === editor);
diff --git a/extensions/vscode-api-tests/src/singlefolder-tests/workspace.tasks.test.ts b/extensions/vscode-api-tests/src/singlefolder-tests/workspace.tasks.test.ts
index 37426834335..c831e6d4306 100644
--- a/extensions/vscode-api-tests/src/singlefolder-tests/workspace.tasks.test.ts
+++ b/extensions/vscode-api-tests/src/singlefolder-tests/workspace.tasks.test.ts
@@ -168,7 +168,7 @@ import { window, tasks, Disposable, TaskDefinition, Task, EventEmitter, CustomEx
 		});
 
 		test('Execution from onDidEndTaskProcess and onDidStartTaskProcess are equal to original', () => {
-			return new Promise(async (resolve) => {
+			return new Promise<void>(async (resolve) => {
 				const task = new Task({ type: 'testTask' }, TaskScope.Workspace, 'echo', 'testTask', new ShellExecution('echo', ['hello test']));
 				let taskExecution: TaskExecution | undefined;
 				const executeDoneEvent: EventEmitter<void> = new EventEmitter();
@@ -213,7 +213,7 @@ import { window, tasks, Disposable, TaskDefinition, Task, EventEmitter, CustomEx
 
 		// https://github.com/microsoft/vscode/issues/100577
 		test('A CustomExecution task can be fetched and executed', () => {
-			return new Promise(async (resolve, reject) => {
+			return new Promise<void>(async (resolve, reject) => {
 				class CustomTerminal implements Pseudoterminal {
 					private readonly writeEmitter = new EventEmitter<string>();
 					public readonly onDidWrite: Event<string> = this.writeEmitter.event;
diff --git a/extensions/vscode-notebook-tests/src/notebook.test.ts b/extensions/vscode-notebook-tests/src/notebook.test.ts
index 6bb916b5d0e..e3ea9eefece 100644
--- a/extensions/vscode-notebook-tests/src/notebook.test.ts
+++ b/extensions/vscode-notebook-tests/src/notebook.test.ts
@@ -57,7 +57,7 @@ async function splitEditor() {
 }
 
 async function saveFileAndCloseAll(resource: vscode.Uri) {
-	const documentClosed = new Promise((resolve, _reject) => {
+	const documentClosed = new Promise<void>((resolve, _reject) => {
 		const d = vscode.notebook.onDidCloseNotebookDocument(e => {
 			if (e.uri.toString() === resource.toString()) {
 				d.dispose();
@@ -71,7 +71,7 @@ async function saveFileAndCloseAll(resource: vscode.Uri) {
 }
 
 async function saveAllFilesAndCloseAll(resource: vscode.Uri | undefined) {
-	const documentClosed = new Promise((resolve, _reject) => {
+	const documentClosed = new Promise<void>((resolve, _reject) => {
 		if (!resource) {
 			return resolve();
 		}