diff --git a/src/frostfs_testlib/credentials/authmate_s3_provider.py b/src/frostfs_testlib/credentials/authmate_s3_provider.py
index 66c5015..ed6454b 100644
--- a/src/frostfs_testlib/credentials/authmate_s3_provider.py
+++ b/src/frostfs_testlib/credentials/authmate_s3_provider.py
@@ -1,5 +1,4 @@
 import re
-from datetime import datetime
 from typing import Optional
 
 from frostfs_testlib import reporter
@@ -10,6 +9,7 @@ from frostfs_testlib.shell import LocalShell
 from frostfs_testlib.steps.cli.container import list_containers
 from frostfs_testlib.storage.cluster import ClusterNode
 from frostfs_testlib.storage.dataclasses.frostfs_services import S3Gate
+from frostfs_testlib.utils import string_utils
 
 
 class AuthmateS3CredentialsProvider(S3CredentialsProvider):
@@ -22,7 +22,7 @@ class AuthmateS3CredentialsProvider(S3CredentialsProvider):
 
         gate_public_keys = [node.service(S3Gate).get_wallet_public_key() for node in cluster_nodes]
         # unique short bucket name
-        bucket = f"bucket-{hex(int(datetime.now().timestamp()*1000000))}"
+        bucket = string_utils.unique_name("bucket-")
 
         frostfs_authmate: FrostfsAuthmate = FrostfsAuthmate(shell, FROSTFS_AUTHMATE_EXEC)
         issue_secret_output = frostfs_authmate.secret.issue(