diff --git a/polkadot/parachain/test-parachains/adder/collator/README.md b/polkadot/parachain/test-parachains/adder/collator/README.md
index c4047ed82e..543da44633 100644
--- a/polkadot/parachain/test-parachains/adder/collator/README.md
+++ b/polkadot/parachain/test-parachains/adder/collator/README.md
@@ -3,7 +3,7 @@
 First start two validators that will run for the relay chain:
 ```sh
 cargo run --features=real-overseer --release -- -d alice --chain rococo-local --validator --alice --port 50551
-cargo run --features=real-overseer --release -- -d bob --chain rococo-local --validator --alice --port 50552
+cargo run --features=real-overseer --release -- -d bob --chain rococo-local --validator --bob --port 50552
 ```
 
 Next start the collator that will collate for the adder parachain:
diff --git a/polkadot/parachain/test-parachains/adder/collator/src/lib.rs b/polkadot/parachain/test-parachains/adder/collator/src/lib.rs
index c981b786af..7246fb9f63 100644
--- a/polkadot/parachain/test-parachains/adder/collator/src/lib.rs
+++ b/polkadot/parachain/test-parachains/adder/collator/src/lib.rs
@@ -100,12 +100,18 @@ impl Collator {
 	) -> Box<dyn Fn(Hash, &ValidationData) -> Pin<Box<dyn Future<Output = Option<Collation>> + Send>> + Send + Sync> {
 		let state = self.state.clone();
 
-		Box::new(move |_, validation_data| {
+		Box::new(move |relay_parent, validation_data| {
 			let parent = HeadData::decode(&mut &validation_data.persisted.parent_head.0[..])
 				.expect("Decodes parent head");
 
 			let (block_data, head_data) = state.lock().unwrap().advance(parent);
 
+			log::info!(
+				"created a new collation on relay-parent({}): {:?}",
+				relay_parent,
+				block_data,
+			);
+
 			let collation = Collation {
 				upward_messages: Vec::new(),
 				new_validation_code: None,