diff --git a/prototypes/quic_demo/README.md b/prototypes/quic_demo/README.md
index 6d48ea2..1302ca4 100644
--- a/prototypes/quic_demo/README.md
+++ b/prototypes/quic_demo/README.md
@@ -18,6 +18,7 @@ The end-to-end testing above is the happy path. Try these sadder cases:
 - Swap Steps 2 and 3
 - After Step 2, restart the server proxy P4
 - After Step 3, restart the client proxy P2
+- After Step 5, close P1. P2 and P4 should stay up
 - After Step 2, restart the relay server P3
 - After Step 3, restart the relay server P3