diff --git a/conductor/tracks/expand_testing_20260318/plan.md b/conductor/tracks/expand_testing_20260318/plan.md
index 33eb12a84..759ebe9f9 100644
--- a/conductor/tracks/expand_testing_20260318/plan.md
+++ b/conductor/tracks/expand_testing_20260318/plan.md
@@ -15,7 +15,7 @@
 ## Phase 3: Property-Based Parsing Tests (Kotest)
 - [x] Task: Add `Kotest` property-based tests for `StreamFrameCodec` in `core:network`. 2c8fd6a8f
 - [x] Task: Add `Kotest` property-based tests for `PacketHandler` implementations in `core:data`. 7d56c3fef
-- [ ] Task: Add `Kotest` property-based tests for `TcpTransport` and/or `SerialTransport` in `core:network`.
+- [x] Task: Add `Kotest` property-based tests for `TcpTransport` and/or `SerialTransport` in `core:network`. 2fd68d67e
 - [ ] Task: Conductor - User Manual Verification 'Phase 3: Property-Based Parsing Tests (Kotest)' (Protocol in workflow.md)
 
 ## Phase 4: Domain Logic Gap Fill