diff --git a/packages/app-cli/app/command-testing.ts b/packages/app-cli/app/command-testing.ts
index aa438ba7700..f137a92f9e3 100644
--- a/packages/app-cli/app/command-testing.ts
+++ b/packages/app-cli/app/command-testing.ts
@@ -3,6 +3,8 @@ import { reg } from '@joplin/lib/registry';
 import Note from '@joplin/lib/models/Note';
 import uuid from '@joplin/lib/uuid';
 import populateDatabase from '@joplin/lib/services/debug/populateDatabase';
+import { readCredentialFile } from '@joplin/lib/utils/credentialFiles';
+import JoplinServerApi from '@joplin/lib/JoplinServerApi';
 
 function randomElement(array: any[]): any {
 	if (!array.length) return null;
@@ -87,6 +89,38 @@ class Command extends BaseCommand {
 			}
 		}
 
+		if (command === 'joplinServerParallelItemUpdate') {
+			const randomContent = () => {
+				const charCount = Math.random() * 1000;
+				return 'a'.repeat(charCount);
+			};
+
+			const joplinServerAuth = JSON.parse(await readCredentialFile('joplin-server-test.json'));
+
+			const api = new JoplinServerApi({
+				baseUrl: () => joplinServerAuth.baseUrl,
+				userContentBaseUrl: () => joplinServerAuth.userContentBaseUrl,
+				username: () => joplinServerAuth.email,
+				password: () => joplinServerAuth.password,
+			});
+
+			const apiPut = async () => {
+				await api.exec('PUT', 'api/items/root:/testing:/content', {}, randomContent(), {
+					'Content-Type': 'application/octet-stream',
+				});
+			};
+
+			await apiPut();
+
+			const promises = [];
+			for (let i = 0; i < 100; i++) {
+				promises.push(void apiPut());
+			}
+			await Promise.all(promises);
+
+			console.info(await api.exec('GET', 'api/items/root:/testing:'));
+		}
+
 		await Promise.all(promises);
 	}