diff --git a/services/commtest/tests/backup/backup_utils.rs b/services/commtest/tests/backup/backup_utils.rs
new file mode 100644
--- /dev/null
+++ b/services/commtest/tests/backup/backup_utils.rs
@@ -0,0 +1,36 @@
+pub mod proto {
+  tonic::include_proto!("backup");
+}
+
+pub use proto::backup_service_client::BackupServiceClient;
+
+// stands for both, backup and log items
+#[allow(dead_code)]
+pub struct Item {
+  pub id: String,
+  pub chunks_sizes: Vec<usize>,
+  pub attachments_holders: Vec<String>,
+}
+
+#[allow(dead_code)]
+impl Item {
+  pub fn new(
+    id: String,
+    chunks_sizes: Vec<usize>,
+    attachments_holders: Vec<String>,
+  ) -> Item {
+    Item {
+      id,
+      chunks_sizes,
+      attachments_holders,
+    }
+  }
+}
+
+#[allow(dead_code)]
+pub struct BackupData {
+  pub user_id: String,
+  pub device_id: String,
+  pub backup_item: Item,
+  pub log_items: Vec<Item>,
+}