diff --git a/bitcoin/examples/ecdsa-psbt-simple.rs b/bitcoin/examples/ecdsa-psbt-simple.rs
index b96cb7367..1acfab8e9 100644
--- a/bitcoin/examples/ecdsa-psbt-simple.rs
+++ b/bitcoin/examples/ecdsa-psbt-simple.rs
@@ -101,7 +101,7 @@ fn dummy_unspent_transaction_outputs() -> Vec<(OutPoint, TxOut)> {
         .script_pubkey();
 
     let out_point_1 = OutPoint {
-        txid: Txid::all_zeros(), // Obviously invalid.
+        txid: Txid::from_byte_array([0xFF; 32]), // Arbitrary invalid dummy value.
         vout: 0,
     };
 
@@ -115,7 +115,7 @@ fn dummy_unspent_transaction_outputs() -> Vec<(OutPoint, TxOut)> {
         .script_pubkey();
 
     let out_point_2 = OutPoint {
-        txid: Txid::all_zeros(), // Obviously invalid.
+        txid: Txid::from_byte_array([0xFF; 32]), // Arbitrary invalid dummy value.
         vout: 1,
     };
 
diff --git a/bitcoin/examples/sign-tx-segwit-v0.rs b/bitcoin/examples/sign-tx-segwit-v0.rs
index 932663c94..997104d66 100644
--- a/bitcoin/examples/sign-tx-segwit-v0.rs
+++ b/bitcoin/examples/sign-tx-segwit-v0.rs
@@ -119,7 +119,7 @@ fn dummy_unspent_transaction_output(wpkh: WPubkeyHash) -> (OutPoint, TxOut) {
     let script_pubkey = ScriptBuf::new_p2wpkh(wpkh);
 
     let out_point = OutPoint {
-        txid: Txid::all_zeros(), // Obviously invalid.
+        txid: Txid::from_byte_array([0xFF; 32]), // Arbitrary invalid dummy value.
         vout: 0,
     };
 
diff --git a/bitcoin/examples/sign-tx-taproot.rs b/bitcoin/examples/sign-tx-taproot.rs
index 23b8b2923..c56f5e912 100644
--- a/bitcoin/examples/sign-tx-taproot.rs
+++ b/bitcoin/examples/sign-tx-taproot.rs
@@ -119,7 +119,7 @@ fn dummy_unspent_transaction_output<C: Verification>(
     let script_pubkey = ScriptBuf::new_p2tr(secp, internal_key, None);
 
     let out_point = OutPoint {
-        txid: Txid::all_zeros(), // Obviously invalid.
+        txid: Txid::from_byte_array([0xFF; 32]), // Arbitrary invalid dummy value.
         vout: 0,
     };
 
diff --git a/bitcoin/examples/taproot-psbt-simple.rs b/bitcoin/examples/taproot-psbt-simple.rs
index edd375ec6..90fc3a602 100644
--- a/bitcoin/examples/taproot-psbt-simple.rs
+++ b/bitcoin/examples/taproot-psbt-simple.rs
@@ -111,7 +111,7 @@ fn dummy_unspent_transaction_outputs() -> Vec<(OutPoint, TxOut)> {
         .script_pubkey();
 
     let out_point_1 = OutPoint {
-        txid: Txid::all_zeros(), // Obviously invalid.
+        txid: Txid::from_byte_array([0xFF; 32]), // Arbitrary invalid dummy value.
         vout: 0,
     };
 
@@ -125,7 +125,7 @@ fn dummy_unspent_transaction_outputs() -> Vec<(OutPoint, TxOut)> {
         .script_pubkey();
 
     let out_point_2 = OutPoint {
-        txid: Txid::all_zeros(), // Obviously invalid.
+        txid: Txid::from_byte_array([0xFF; 32]), // Arbitrary invalid dummy value.
         vout: 1,
     };
 
diff --git a/bitcoin/src/blockdata/block.rs b/bitcoin/src/blockdata/block.rs
index 2578e3f8d..1670389d4 100644
--- a/bitcoin/src/blockdata/block.rs
+++ b/bitcoin/src/blockdata/block.rs
@@ -305,7 +305,7 @@ impl Block {
         let hashes = self.txdata.iter().enumerate().map(|(i, t)| {
             if i == 0 {
                 // Replace the first hash with zeroes.
-                Wtxid::all_zeros()
+                Wtxid::COINBASE
             } else {
                 t.compute_wtxid()
             }
diff --git a/bitcoin/src/blockdata/constants.rs b/bitcoin/src/blockdata/constants.rs
index 7ac1d4905..e553d129c 100644
--- a/bitcoin/src/blockdata/constants.rs
+++ b/bitcoin/src/blockdata/constants.rs
@@ -226,7 +226,7 @@ mod test {
 
         assert_eq!(gen.version, transaction::Version::ONE);
         assert_eq!(gen.input.len(), 1);
-        assert_eq!(gen.input[0].previous_output.txid, Txid::all_zeros());
+        assert_eq!(gen.input[0].previous_output.txid, Txid::COINBASE_PREVOUT);
         assert_eq!(gen.input[0].previous_output.vout, 0xFFFFFFFF);
         assert_eq!(serialize(&gen.input[0].script_sig),
                    hex!("4d04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73"));
diff --git a/bitcoin/src/merkle_tree/mod.rs b/bitcoin/src/merkle_tree/mod.rs
index f024482b0..39c9310b3 100644
--- a/bitcoin/src/merkle_tree/mod.rs
+++ b/bitcoin/src/merkle_tree/mod.rs
@@ -8,8 +8,8 @@
 //! # use bitcoin::Txid;
 //! # use bitcoin::merkle_tree::{MerkleNode as _, TxMerkleNode};
 //! # use bitcoin::hashes::Hash;
-//! # let tx1 = Txid::all_zeros();  // Dummy hash values.
-//! # let tx2 = Txid::all_zeros();
+//! # 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 root = TxMerkleNode::calculate_root(tx_hashes.into_iter());
 //! ```