diff --git a/test/test-utils.js b/test/test-utils.js
index 4bb333898b..0f0d58a31f 100644
--- a/test/test-utils.js
+++ b/test/test-utils.js
@@ -24,7 +24,7 @@ async function setUpTestConnection() {
 
 // Generate some unique string with a given prefix using the alice nonce.
 function generateUniqueString(prefix) {
-    return prefix + Date.now() + Math.round(Math.random() * 1000);
+    return `${prefix}-${Date.now()}-${Math.round(Math.random() * 1000000)}`;
 }
 
 async function createAccount(near) {