diff --git a/lightning/src/ln/channelmanager.rs b/lightning/src/ln/channelmanager.rs
index 746061d97ea..356c4218654 100644
--- a/lightning/src/ln/channelmanager.rs
+++ b/lightning/src/ln/channelmanager.rs
@@ -23,7 +23,6 @@ use bitcoin::blockdata::constants::{genesis_block, ChainHash};
 use bitcoin::network::constants::Network;
 
 use bitcoin::hashes::Hash;
-use bitcoin::hashes::hex::ToHex;
 use bitcoin::hashes::sha256::Hash as Sha256;
 use bitcoin::hash_types::{BlockHash, Txid};
 
@@ -10364,6 +10363,16 @@ mod tests {
 		let events = nodes[0].node.get_and_clear_pending_msg_events();
 		assert_eq!(events.len(), 0);
 	}
+
+	#[test]
+	fn test_payment_display() {
+		let payment_id = PaymentId([42; 32]);
+		assert_eq!(format!("{}", &payment_id), "2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a");
+		let payment_hash = PaymentHash([42; 32]);
+		assert_eq!(format!("{}", &payment_hash), "2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a");
+		let payment_preimage = PaymentPreimage([42; 32]);
+		assert_eq!(format!("{}", &payment_preimage), "2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a");
+	}
 }
 
 #[cfg(ldk_bench)]
diff --git a/lightning/src/routing/gossip.rs b/lightning/src/routing/gossip.rs
index 6532461a838..6041397b16f 100644
--- a/lightning/src/routing/gossip.rs
+++ b/lightning/src/routing/gossip.rs
@@ -3418,6 +3418,12 @@ pub(crate) mod tests {
 		// This serialized info has an address field but no announcement_message, therefore the addresses returned by our function will still be empty
 		assert!(ann_info_with_addresses.addresses().is_empty());
 	}
+
+	#[test]
+	fn test_node_id_display() {
+		let node_id = NodeId([42; 33]);
+		assert_eq!(format!("{}", &node_id), "2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a2a");
+	}
 }
 
 #[cfg(ldk_bench)]