diff --git a/backend/tests/utils/helpers.ts b/backend/tests/utils/helpers.ts
index 834eca7..cdc4454 100644
--- a/backend/tests/utils/helpers.ts
+++ b/backend/tests/utils/helpers.ts
@@ -75,7 +75,7 @@ export const login = async (app: Express, username?: string, password?: string)
 };
 
 export const deleteAllRooms = async (app: Express) => {
-	let nextPageToken = '';
+	let nextPageToken = undefined;
 
 	do {
 		const response: any = await request(app)