diff --git a/conductor/tracks/testing_infrastructure_20260219/plan.md b/conductor/tracks/testing_infrastructure_20260219/plan.md
index 3ea9e87..fefd4d8 100644
--- a/conductor/tracks/testing_infrastructure_20260219/plan.md
+++ b/conductor/tracks/testing_infrastructure_20260219/plan.md
@@ -1,9 +1,9 @@
 # Implementation Plan - Testing Infrastructure
 
 ## Phase 1: Environment & Mock Server
-- [ ] Task: Scaffold Docker environment
-    - [ ] Create test_data/ directory.
-    - [ ] Create docker-compose.test.yml with SilverBullet and an Nginx container serving test_data/.
+- [x] Task: Scaffold Docker environment 23a59b9
+    - [x] Create test_data/ directory.
+    - [x] Create docker-compose.test.yml with SilverBullet and an Nginx container serving test_data/.
 - [ ] Task: Integration Test Scaffolding
     - [ ] Create tests/integration_test.ts that uses the actual ts-ics parser on files in test_data/.
 - [ ] Task: Conductor - User Manual Verification 'Environment & Mock Server' (Protocol in workflow.md)