diff --git a/src/frostfs_testlib/resources/error_patterns.py b/src/frostfs_testlib/resources/error_patterns.py
index 3ba5f13..560d342 100644
--- a/src/frostfs_testlib/resources/error_patterns.py
+++ b/src/frostfs_testlib/resources/error_patterns.py
@@ -9,6 +9,7 @@ OBJECT_ALREADY_REMOVED = "code = 2052.*message = object already removed"
 SESSION_NOT_FOUND = "code = 4096.*message = session token not found"
 OUT_OF_RANGE = "code = 2053.*message = out of range"
 EXPIRED_SESSION_TOKEN = "code = 4097.*message = expired session token"
+ADD_CHAIN_ERROR = "code = 5120 message = apemanager access denied"
 # TODO: Change to codes with message
 # OBJECT_IS_LOCKED = "code = 2050.*message = object is locked"
 # LOCK_NON_REGULAR_OBJECT = "code = 2051.*message = ..." will be available once 2092 is fixed