diff --git a/env.example b/env.example
index 11a7e606e..079d18980 100644
--- a/env.example
+++ b/env.example
@@ -196,6 +196,10 @@ SPEECHMATICS_API_KEY=...
 # Tavus
 TAVUS_API_KEY=...
 TAVUS_REPLICA_ID=...
+# Used by scripts/daily/test_tavus_transport.py, which mimics Tavus behavior
+# inside a Daily room for local testing. Set this to the Daily room URL where
+# the Pipecat pipeline is running.
+TAVUS_SAMPLE_ROOM_URL=https://...
 
 # Telnyx
 TELNYX_API_KEY=...