diff --git a/src/frostfs_testlib/storage/grpc_operations/implementations/chunks.py b/src/frostfs_testlib/storage/grpc_operations/implementations/chunks.py
index ad45855..0d787e2 100644
--- a/src/frostfs_testlib/storage/grpc_operations/implementations/chunks.py
+++ b/src/frostfs_testlib/storage/grpc_operations/implementations/chunks.py
@@ -161,5 +161,5 @@ class ChunksOperations(interfaces.ChunksInterface):
     def _parse_object_nodes(self, object_nodes: str) -> list[Chunk]:
         parse_result = json.loads(object_nodes)
         if parse_result.get("errors"):
-            raise parse_result["errors"]
+            raise RuntimeError(", ".join(parse_result["errors"]))
         return [Chunk(**chunk) for chunk in parse_result["data_objects"]]