diff --git a/lsp-sample/client/src/test/helper.ts b/lsp-sample/client/src/test/helper.ts
index 0bc0c3fc..6e6724d3 100644
--- a/lsp-sample/client/src/test/helper.ts
+++ b/lsp-sample/client/src/test/helper.ts
@@ -16,7 +16,7 @@ export let platformEol: string;
  */
 export async function activate(docUri: vscode.Uri) {
 	// The extensionId is `publisher.name` from package.json
-	const ext = vscode.extensions.getExtension('vscode.lsp-sample')!;
+	const ext = vscode.extensions.getExtension('vscode-samples.lsp-sample')!;
 	await ext.activate();
 	try {
 		doc = await vscode.workspace.openTextDocument(docUri);