diff --git a/rs/moq-scene/src/source.rs b/rs/moq-scene/src/source.rs
index dea576d..db4aafd 100644
--- a/rs/moq-scene/src/source.rs
+++ b/rs/moq-scene/src/source.rs
@@ -2318,7 +2318,12 @@ mod tests {
 				)
 				.unwrap();
 			let (video, mut encoder) = rendition(&live.broadcast, timebase).await;
-			drop(std::mem::replace(&mut live.video, video));
+			// Finished before it goes, as a publisher retires a rendition: one
+			// dropped unfinished aborts its track, which fails the source if
+			// that reaches it before the catalog naming the replacement does.
+			let mut old = std::mem::replace(&mut live.video, video);
+			old.finish().unwrap();
+			drop(old);
 			until_time(kio::clock::now()).await;
 			let arrived = kio::clock::now();
 			picture(&mut live.video, &mut encoder, 0);