diff --git a/bitcoin/src/merkle_tree/mod.rs b/bitcoin/src/merkle_tree/mod.rs
index 39c9310b3..13a1c6629 100644
--- a/bitcoin/src/merkle_tree/mod.rs
+++ b/bitcoin/src/merkle_tree/mod.rs
@@ -7,11 +7,11 @@
 //! ```
 //! # use bitcoin::Txid;
 //! # use bitcoin::merkle_tree::{MerkleNode as _, TxMerkleNode};
-//! # use bitcoin::hashes::Hash;
 //! # let tx1 = Txid::from_byte_array([0xAA; 32]);  // Arbitrary dummy hash values.
 //! # let tx2 = Txid::from_byte_array([0xFF; 32]);
-//! let tx_hashes = vec![tx1, tx2]; // All the hashes we wish to merkelize.
+//! let tx_hashes = [tx1, tx2]; // All the hashes we wish to merkelize.
 //! let root = TxMerkleNode::calculate_root(tx_hashes.into_iter());
+//! assert!(root.is_some());
 //! ```
 
 mod block;