diff --git a/crates/lanspread-peer/src/install/transaction.rs b/crates/lanspread-peer/src/install/transaction.rs
index 38718e4..6685160 100644
--- a/crates/lanspread-peer/src/install/transaction.rs
+++ b/crates/lanspread-peer/src/install/transaction.rs
@@ -691,6 +691,52 @@ mod tests {
         assert!(root.join("version.ini").is_file());
     }
 
+    #[cfg(unix)]
+    #[tokio::test]
+    async fn uninstall_delete_failure_restores_backup() {
+        use std::os::unix::fs::PermissionsExt;
+
+        let temp = TempDir::new();
+        let root = temp.game_root();
+        let locked_dir = root.join("local").join("locked");
+        write_file(&root.join("version.ini"), b"20250101");
+        write_file(&root.join("local").join("old.txt"), b"old");
+        write_file(&locked_dir.join("payload.txt"), b"locked");
+        std::fs::set_permissions(&locked_dir, std::fs::Permissions::from_mode(0o500))
+            .expect("locked dir permissions should be set");
+
+        let _err = uninstall(&root, "game")
+            .await
+            .expect_err("uninstall should fail while deleting backup");
+
+        for restored_locked_dir in [
+            root.join("local").join("locked"),
+            root.join(".local.backup").join("locked"),
+        ] {
+            if restored_locked_dir.exists() {
+                std::fs::set_permissions(
+                    &restored_locked_dir,
+                    std::fs::Permissions::from_mode(0o700),
+                )
+                .expect("locked dir permissions should be restored for cleanup");
+            }
+        }
+
+        assert_eq!(
+            std::fs::read(root.join("local").join("old.txt"))
+                .expect("old install should be restored"),
+            b"old"
+        );
+        assert_eq!(
+            std::fs::read(root.join("local").join("locked").join("payload.txt"))
+                .expect("locked payload should be restored"),
+            b"locked"
+        );
+        assert!(!root.join(".local.backup").exists());
+        let intent = read_intent(&root, "game").await;
+        assert_eq!(intent.state, InstallIntentState::None);
+    }
+
     #[derive(Clone)]
     struct RecoveryCase {
         name: &'static str,