diff --git a/crates/geth-control/src/lib.rs b/crates/geth-control/src/lib.rs
index 6b980f6..f538d75 100644
--- a/crates/geth-control/src/lib.rs
+++ b/crates/geth-control/src/lib.rs
@@ -3145,6 +3145,24 @@ mod tests {
             request
         );
 
+        let response = PipeWireResponse::Error {
+            message: "pipe denied".to_owned(),
+        };
+        assert_eq!(
+            decode_pipe_wire_response(&encode_pipe_wire_response(&response).expect("encode"))
+                .expect("decode"),
+            response
+        );
+
+        let response = OverlayWireResponse::Error {
+            message: "overlay denied".to_owned(),
+        };
+        assert_eq!(
+            decode_overlay_wire_response(&encode_overlay_wire_response(&response).expect("encode"))
+                .expect("decode"),
+            response
+        );
+
         let response = PeerControlResponse::SshProxyConnected {
             node_id: "node:peer".to_owned(),
             agent_id: "agent:peer".to_owned(),
diff --git a/docs/production-readiness-roadmap.md b/docs/production-readiness-roadmap.md
index 82fc000..4c89b40 100644
--- a/docs/production-readiness-roadmap.md
+++ b/docs/production-readiness-roadmap.md
@@ -106,7 +106,7 @@ and downstream projects.
   - `[ ]` Every `ControlRequest` and `ControlResponse` variant roundtrips.
   - `[ ]` Every `PeerControlRequest` and `PeerControlResponse` variant
     roundtrips.
-  - `[ ]` Pipe and overlay wire protocol variants roundtrip.
+  - `[x]` Pipe and overlay wire protocol variants roundtrip.
   - `[x]` Unknown or malformed protocol inputs fail safely.
 
 - `[x]` Classify command stability.