diff --git a/docs/11_conftest_plugin_overview.md b/docs/11_conftest_plugin_overview.md
index 2f46ba5..858d9b9 100644
--- a/docs/11_conftest_plugin_overview.md
+++ b/docs/11_conftest_plugin_overview.md
@@ -38,6 +38,7 @@ sequenceDiagram
     autonumber
     participant Pytest
     participant Plugin as conftest_plugin
+    participant FS as File System
 
     Pytest->>Plugin: pytest_configure(config)
     Note right of Plugin: Ensure ./reports exists