diff --git a/bitcoin/src/blockdata/transaction.rs b/bitcoin/src/blockdata/transaction.rs
index 0b51b984b..274aeada4 100644
--- a/bitcoin/src/blockdata/transaction.rs
+++ b/bitcoin/src/blockdata/transaction.rs
@@ -127,10 +127,6 @@ impl OutPoint {
     pub fn is_null(&self) -> bool { *self == OutPoint::null() }
 }
 
-impl Default for OutPoint {
-    fn default() -> Self { OutPoint::null() }
-}
-
 impl fmt::Display for OutPoint {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         write!(f, "{}:{}", self.txid, self.vout)
@@ -249,6 +245,14 @@ pub struct TxIn {
 }
 
 impl TxIn {
+    /// An empty transaction input with the previous output as for a coinbase transaction.
+    pub const EMPTY_COINBASE: TxIn = TxIn {
+        previous_output: OutPoint::COINBASE_PREVOUT,
+        script_sig: ScriptBuf::new(),
+        sequence: Sequence::MAX,
+        witness: Witness::new(),
+    };
+
     /// Returns the input base weight.
     ///
     /// Base weight excludes the witness and script.
@@ -313,17 +317,6 @@ impl TxIn {
     pub fn total_size(&self) -> usize { self.base_size() + self.witness.size() }
 }
 
-impl Default for TxIn {
-    fn default() -> TxIn {
-        TxIn {
-            previous_output: OutPoint::default(),
-            script_sig: ScriptBuf::new(),
-            sequence: Sequence::MAX,
-            witness: Witness::default(),
-        }
-    }
-}
-
 /// Bitcoin transaction output.
 ///
 /// Defines new coins to be created as a result of the transaction,
@@ -1540,16 +1533,6 @@ mod tests {
         assert!(txin.is_ok());
     }
 
-    #[test]
-    fn txin_default() {
-        let txin = TxIn::default();
-        assert_eq!(txin.previous_output, OutPoint::default());
-        assert_eq!(txin.script_sig, ScriptBuf::new());
-        assert_eq!(txin.sequence, Sequence::from_consensus(0xFFFFFFFF));
-        assert_eq!(txin.previous_output, OutPoint::default());
-        assert_eq!(txin.witness.len(), 0);
-    }
-
     #[test]
     fn is_coinbase() {
         use crate::constants;
@@ -2251,7 +2234,7 @@ mod tests {
 
     #[test]
     fn outpoint_format() {
-        let outpoint = OutPoint::default();
+        let outpoint = OutPoint::COINBASE_PREVOUT;
 
         let debug = "OutPoint { txid: 0000000000000000000000000000000000000000000000000000000000000000, vout: 4294967295 }";
         assert_eq!(debug, format!("{:?}", &outpoint));
diff --git a/bitcoin/src/crypto/sighash.rs b/bitcoin/src/crypto/sighash.rs
index 4992df30c..ab0ac6287 100644
--- a/bitcoin/src/crypto/sighash.rs
+++ b/bitcoin/src/crypto/sighash.rs
@@ -1487,7 +1487,7 @@ mod tests {
         let tx = Transaction {
             version: transaction::Version::ONE,
             lock_time: absolute::LockTime::ZERO,
-            input: vec![TxIn::default(), TxIn::default()],
+            input: vec![TxIn::EMPTY_COINBASE, TxIn::EMPTY_COINBASE],
             output: vec![TxOut::NULL],
         };
         let script = ScriptBuf::new();
@@ -1676,7 +1676,7 @@ mod tests {
         let dumb_tx = Transaction {
             version: transaction::Version::TWO,
             lock_time: absolute::LockTime::ZERO,
-            input: vec![TxIn::default()],
+            input: vec![TxIn::EMPTY_COINBASE],
             output: vec![],
         };
         let mut c = SighashCache::new(&dumb_tx);
diff --git a/bitcoin/src/psbt/mod.rs b/bitcoin/src/psbt/mod.rs
index 08ea1e8ad..08830e4f5 100644
--- a/bitcoin/src/psbt/mod.rs
+++ b/bitcoin/src/psbt/mod.rs
@@ -2155,7 +2155,7 @@ mod tests {
                             vout: 0,
                         },
                         sequence: Sequence::ENABLE_LOCKTIME_NO_RBF,
-                        ..Default::default()
+                        ..TxIn::EMPTY_COINBASE
                     }
                 ],
                 output: vec![
@@ -2186,7 +2186,7 @@ mod tests {
                                     vout: 1,
                                 },
                                 sequence: Sequence::MAX,
-                                ..Default::default()
+                                ..TxIn::EMPTY_COINBASE
                             },
                             TxIn {
                                 previous_output: OutPoint {
@@ -2194,7 +2194,7 @@ mod tests {
                                     vout: 1,
                                 },
                                 sequence: Sequence::MAX,
-                                ..Default::default()
+                                ..TxIn::EMPTY_COINBASE
                             }
                         ],
                         output: vec![
@@ -2258,7 +2258,7 @@ mod tests {
         let unsigned_tx = Transaction {
             version: transaction::Version::TWO,
             lock_time: absolute::LockTime::ZERO,
-            input: vec![TxIn::default(), TxIn::default()],
+            input: vec![TxIn::EMPTY_COINBASE, TxIn::EMPTY_COINBASE],
             output: vec![TxOut::NULL],
         };
         let mut psbt = Psbt::from_unsigned_tx(unsigned_tx).unwrap();