diff --git a/test/automation/src/playwrightDriver.ts b/test/automation/src/playwrightDriver.ts
index 59d012879f5..681ca4ef540 100644
--- a/test/automation/src/playwrightDriver.ts
+++ b/test/automation/src/playwrightDriver.ts
@@ -110,6 +110,14 @@ export class PlaywrightDriver {
 		return await this._cdpSession.send('Runtime.evaluate', options);
 	}
 
+	async releaseObjectGroup(parameters: Protocol.Runtime.releaseObjectGroupParameters): Promise<void> {
+		if (!this._cdpSession) {
+			throw new Error('CDP not started');
+		}
+
+		await this._cdpSession.send('Runtime.releaseObjectGroup', parameters);
+	}
+
 	async queryObjects(parameters: Protocol.Runtime.queryObjectsParameters): Promise<Protocol.Runtime.queryObjectsReturnValue> {
 		if (!this._cdpSession) {
 			throw new Error('CDP not started');
@@ -132,11 +140,15 @@ export class PlaywrightDriver {
 		}
 
 		let snapshot = '';
-		this._cdpSession.addListener('HeapProfiler.addHeapSnapshotChunk', ({ chunk }) => {
-			snapshot += chunk;
-		});
+		const listener = (c: { chunk: string }) => {
+			snapshot += c.chunk;
+		};
+
+		this._cdpSession.addListener('HeapProfiler.addHeapSnapshotChunk', listener);
 
 		await this._cdpSession.send('HeapProfiler.takeHeapSnapshot');
+
+		this._cdpSession.removeListener('HeapProfiler.addHeapSnapshotChunk', listener);
 		return snapshot;
 	}
 
diff --git a/test/automation/src/profiler.ts b/test/automation/src/profiler.ts
index d6f339c3030..1bf9c0c0bd0 100644
--- a/test/automation/src/profiler.ts
+++ b/test/automation/src/profiler.ts
@@ -12,26 +12,28 @@ export class Profiler {
 	constructor(private readonly code: Code) {
 	}
 
-	async checkLeaks(classNames: string | string[], fn: () => Promise<void>): Promise<void> {
+	async checkObjectLeaks(classNames: string | string[], fn: () => Promise<void>): Promise<void> {
 		await this.code.driver.startCDP();
 
 		const countsBefore: { [key: string]: number } = {};
 		const instancesBefore = await getInstances(this.code.driver);
 		const classNamesArray = Array.isArray(classNames) ? classNames : [classNames];
 		for (const className of classNamesArray) {
-			const matchedInstances = instancesBefore.find(e => e.name !== undefined && e.name === className);
+			const matchedInstances = instancesBefore.value.find(e => e.name !== undefined && e.name === className);
 			if (!matchedInstances) {
 				throw new Error(`${className} not found`);
 			}
 			countsBefore[className] = matchedInstances.count;
 		}
 
+		await instancesBefore.dispose();
+
 		await fn();
 
 		const instancesAfter = await getInstances(this.code.driver);
 		const leaks: string[] = [];
 		for (const className of classNamesArray) {
-			const matchedInstancesAfter = instancesAfter.find(e => e.name !== undefined && e.name === className);
+			const matchedInstancesAfter = instancesAfter.value.find(e => e.name !== undefined && e.name === className);
 			if (!matchedInstancesAfter) {
 				throw new Error(`${className} not found`);
 			}
@@ -42,6 +44,8 @@ export class Profiler {
 			}
 		}
 
+		await instancesAfter.dispose();
+
 		if (leaks.length > 0) {
 			throw new Error(leaks.join('\n'));
 		}
@@ -126,7 +130,7 @@ function generateUuid() {
  *  This code is derived from https://github.com/SimonSiefke/vscode-memory-leak-finder
  *--------------------------------------------------------------------------------------------*/
 
-const getInstances = async (driver: PlaywrightDriver): Promise<Array<{ name: string; count: number }>> => {
+const getInstances = async (driver: PlaywrightDriver): Promise<{ value: Array<{ name: string; count: number }>; dispose: () => Promise<void> }> => {
 	await driver.collectGarbage();
 	const objectGroup = `og:${generateUuid()}`;
 	const prototypeDescriptor = await driver.evaluate({
@@ -207,7 +211,13 @@ const getInstances = async (driver: PlaywrightDriver): Promise<Array<{ name: str
 
 	const fnResult2 = await getInstanceCountMap(driver, objectGroup, fnResult1.result);
 	const fnResult3 = await getInstanceCountArray(driver, objectGroup, fnResult2.result);
-	return fnResult3.result.value;
+	return {
+		value: fnResult3.result.value,
+		dispose: async () => {
+			// release object group
+			await driver.releaseObjectGroup({ objectGroup: objectGroup });
+		}
+	};
 };
 
 const getInstanceCountMap = async (driver: PlaywrightDriver, objectGroup: string, objects: Protocol.Runtime.RemoteObject) => {
diff --git a/test/smoke/src/areas/notebook/notebook.test.ts b/test/smoke/src/areas/notebook/notebook.test.ts
index 2de6bd77cf6..da4d527fe4f 100644
--- a/test/smoke/src/areas/notebook/notebook.test.ts
+++ b/test/smoke/src/areas/notebook/notebook.test.ts
@@ -25,7 +25,7 @@ export function setup(logger: Logger) {
 			cp.execSync('git reset --hard HEAD --quiet', { cwd: app.workspacePathOrFolder });
 		});
 
-		it('check heap leaks', async function () {
+		it.skip('check heap leaks', async function () {
 			const app = this.app as Application;
 			await app.profiler.checkHeapLeaks(['NotebookTextModel', 'NotebookCellTextModel', 'NotebookEventDispatcher'], async () => {
 				await app.workbench.notebook.openNotebook();
@@ -36,7 +36,7 @@ export function setup(logger: Logger) {
 
 		it('check object leaks', async function () {
 			const app = this.app as Application;
-			await app.profiler.checkLeaks(['NotebookTextModel'], async () => {
+			await app.profiler.checkObjectLeaks(['NotebookTextModel', 'NotebookCellTextModel', 'NotebookEventDispatcher'], async () => {
 				await app.workbench.notebook.openNotebook();
 				await app.workbench.quickaccess.runCommand('workbench.action.files.save');
 				await app.workbench.quickaccess.runCommand('workbench.action.closeActiveEditor');