diff --git a/src/util/psbt/map/input.rs b/src/util/psbt/map/input.rs
index 3bcbea1f..6d90d559 100644
--- a/src/util/psbt/map/input.rs
+++ b/src/util/psbt/map/input.rs
@@ -525,3 +525,71 @@ where
         btree_map::Entry::Occupied(_) => Err(psbt::Error::DuplicateKey(raw_key).into()),
     }
 }
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn psbt_sighash_type_ecdsa() {
+        for ecdsa in &[
+            EcdsaSigHashType::All,
+            EcdsaSigHashType::None,
+            EcdsaSigHashType::Single,
+            EcdsaSigHashType::AllPlusAnyoneCanPay,
+            EcdsaSigHashType::NonePlusAnyoneCanPay,
+            EcdsaSigHashType::SinglePlusAnyoneCanPay,
+        ] {
+            let sighash = PsbtSigHashType::from(*ecdsa);
+            let s = format!("{}", sighash);
+            let back = PsbtSigHashType::from_str(&s).unwrap();
+            assert_eq!(back, sighash);
+            assert_eq!(back.ecdsa_hash_ty().unwrap(), *ecdsa);
+        }
+    }
+
+    #[test]
+    fn psbt_sighash_type_schnorr() {
+        for schnorr in &[
+            SchnorrSigHashType::Default,
+            SchnorrSigHashType::All,
+            SchnorrSigHashType::None,
+            SchnorrSigHashType::Single,
+            SchnorrSigHashType::AllPlusAnyoneCanPay,
+            SchnorrSigHashType::NonePlusAnyoneCanPay,
+            SchnorrSigHashType::SinglePlusAnyoneCanPay,
+        ] {
+            let sighash = PsbtSigHashType::from(*schnorr);
+            let s = format!("{}", sighash);
+            let back = PsbtSigHashType::from_str(&s).unwrap();
+            assert_eq!(back, sighash);
+            assert_eq!(back.schnorr_hash_ty().unwrap(), *schnorr);
+        }
+    }
+
+    #[test]
+    fn psbt_sighash_type_schnorr_notstd() {
+        for (schnorr, schnorr_str) in &[
+            (SchnorrSigHashType::Reserved, "0xff"),
+        ] {
+            let sighash = PsbtSigHashType::from(*schnorr);
+            let s = format!("{}", sighash);
+            assert_eq!(&s, schnorr_str);
+            let back = PsbtSigHashType::from_str(&s).unwrap();
+            assert_eq!(back, sighash);
+            assert_eq!(back.schnorr_hash_ty().unwrap(), *schnorr);
+        }
+    }
+
+    #[test]
+    fn psbt_sighash_type_notstd() {
+        let nonstd = 0xdddddddd;
+        let sighash = PsbtSigHashType { inner: nonstd };
+        let s = format!("{}", sighash);
+        let back = PsbtSigHashType::from_str(&s).unwrap();
+
+        assert_eq!(back, sighash);
+        assert_eq!(back.ecdsa_hash_ty(), Err(NonStandardSigHashType(nonstd)));
+        assert_eq!(back.schnorr_hash_ty(), Err(sighash::Error::InvalidSigHashType(nonstd)));
+    }
+}