diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/example/main.dart b/catalyst_voices_packages/catalyst_cardano_serialization/example/main.dart
index 66a3e5a8a4..ac89d94ba2 100644
--- a/catalyst_voices_packages/catalyst_cardano_serialization/example/main.dart
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/example/main.dart
@@ -57,7 +57,6 @@ void main() {
   final txBuilder = TransactionBuilder(
     config: txBuilderConfig,
     inputs: [utxo],
-    outputs: [],
     // fee can be left empty so that it's autocalculated or can be hardcoded
     // fee: const Coin(1000000),
     ttl: const SlotBigNum(410021),
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/builders/transaction_builder.dart b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/builders/transaction_builder.dart
index c29f973721..9666cc7f72 100644
--- a/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/builders/transaction_builder.dart
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/lib/src/builders/transaction_builder.dart
@@ -50,7 +50,7 @@ class TransactionBuilder {
   const TransactionBuilder({
     required this.config,
     required this.inputs,
-    required this.outputs,
+    this.outputs = const [],
     this.fee,
     this.ttl,
     this.auxiliaryData,
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/test/test_utils/test_data.dart b/catalyst_voices_packages/catalyst_cardano_serialization/test/test_utils/test_data.dart
index ba0491dec5..88775f4482 100644
--- a/catalyst_voices_packages/catalyst_cardano_serialization/test/test_utils/test_data.dart
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/test/test_utils/test_data.dart
@@ -29,15 +29,26 @@ final testTransactionHash = TransactionHash.fromHex(
   '4c1fbc5433ec764164945d736a09dc087d59ff30e64d26d462ff8570cd4be9a7',
 );
 
+TransactionUnspentOutput testUtxo() {
+  return TransactionUnspentOutput(
+    input: TransactionInput(
+      transactionId: testTransactionHash,
+      index: 0,
+    ),
+    output: TransactionOutput(
+      address: ShelleyAddress.fromBech32(
+        'addr_test1qpu5vlrf4xkxv2qpwngf6cjhtw542ayty80v8dyr49rf5'
+        'ewvxwdrt70qlcpeeagscasafhffqsxy36t90ldv06wqrk2qum8x5w',
+      ),
+      amount: const Coin(100000000),
+    ),
+  );
+}
+
 Transaction minimalUnsignedTestTransaction() {
   return Transaction(
     body: TransactionBody(
-      inputs: {
-        TransactionInput(
-          transactionId: testTransactionHash,
-          index: 0,
-        ),
-      },
+      inputs: {testUtxo().input},
       outputs: [
         TransactionOutput(
           address: testnetAddr,
@@ -61,12 +72,7 @@ Transaction minimalUnsignedTestTransaction() {
 Transaction minimalSignedTestTransaction() {
   return Transaction(
     body: TransactionBody(
-      inputs: {
-        TransactionInput(
-          transactionId: testTransactionHash,
-          index: 0,
-        ),
-      },
+      inputs: {testUtxo().input},
       outputs: [
         TransactionOutput(
           address: testnetAddr,
@@ -103,31 +109,11 @@ Transaction minimalSignedTestTransaction() {
 }
 
 Transaction fullUnsignedTestTransaction() {
-  final auxiliaryData = AuxiliaryData(
-    map: {
-      const CborSmallInt(1): CborString('Test'),
-      const CborSmallInt(2): CborBytes(hex.decode('aabbccddeeff')),
-      const CborSmallInt(3): const CborSmallInt(997),
-      const CborSmallInt(4): cbor.decode(
-        hex.decode(
-          '82a50081825820afcf8497561065afe1ca623823508753cc580eb575ac8f1d6cfa'
-          'a18c3ceeac010001818258390080f9e2c88e6c817008f3a812ed889b4a4da8e0bd'
-          '103f86e7335422aa122a946b9ad3d2ddf029d3a828f0468aece76895f15c9efbd6'
-          '9b42771a00df1560021a0002e63003182f075820bdc2b27e6869aa9a5fa23a1f1f'
-          'd3a87025d8703df4fd7b120d058c839dc0415c82a10141aa80',
-        ),
-      ),
-    },
-  );
+  final auxiliaryData = testAuxiliaryData();
 
   return Transaction(
     body: TransactionBody(
-      inputs: {
-        TransactionInput(
-          transactionId: testTransactionHash,
-          index: 0,
-        ),
-      },
+      inputs: {testUtxo().input},
       outputs: [
         TransactionOutput(
           address: testnetAddr,
@@ -153,31 +139,11 @@ Transaction fullUnsignedTestTransaction() {
 
 /// Returns a full transaction with all possible optional fields.
 Transaction fullSignedTestTransaction() {
-  final auxiliaryData = AuxiliaryData(
-    map: {
-      const CborSmallInt(1): CborString('Test'),
-      const CborSmallInt(2): CborBytes(hex.decode('aabbccddeeff')),
-      const CborSmallInt(3): const CborSmallInt(997),
-      const CborSmallInt(4): cbor.decode(
-        hex.decode(
-          '82a50081825820afcf8497561065afe1ca623823508753cc580eb575ac8f1d6cfa'
-          'a18c3ceeac010001818258390080f9e2c88e6c817008f3a812ed889b4a4da8e0bd'
-          '103f86e7335422aa122a946b9ad3d2ddf029d3a828f0468aece76895f15c9efbd6'
-          '9b42771a00df1560021a0002e63003182f075820bdc2b27e6869aa9a5fa23a1f1f'
-          'd3a87025d8703df4fd7b120d058c839dc0415c82a10141aa80',
-        ),
-      ),
-    },
-  );
+  final auxiliaryData = testAuxiliaryData();
 
   return Transaction(
     body: TransactionBody(
-      inputs: {
-        TransactionInput(
-          transactionId: testTransactionHash,
-          index: 0,
-        ),
-      },
+      inputs: {testUtxo().input},
       outputs: [
         TransactionOutput(
           address: testnetAddr,
@@ -217,4 +183,23 @@ Transaction fullSignedTestTransaction() {
   );
 }
 
+AuxiliaryData testAuxiliaryData() {
+  return AuxiliaryData(
+    map: {
+      const CborSmallInt(1): CborString('Test'),
+      const CborSmallInt(2): CborBytes(hex.decode('aabbccddeeff')),
+      const CborSmallInt(3): const CborSmallInt(997),
+      const CborSmallInt(4): cbor.decode(
+        hex.decode(
+          '82a50081825820afcf8497561065afe1ca623823508753cc580eb575ac8f1d6cfa'
+          'a18c3ceeac010001818258390080f9e2c88e6c817008f3a812ed889b4a4da8e0bd'
+          '103f86e7335422aa122a946b9ad3d2ddf029d3a828f0468aece76895f15c9efbd6'
+          '9b42771a00df1560021a0002e63003182f075820bdc2b27e6869aa9a5fa23a1f1f'
+          'd3a87025d8703df4fd7b120d058c839dc0415c82a10141aa80',
+        ),
+      ),
+    },
+  );
+}
+
 /* cSpell:enable */
diff --git a/catalyst_voices_packages/catalyst_cardano_serialization/test/transaction_test.dart b/catalyst_voices_packages/catalyst_cardano_serialization/test/transaction_test.dart
index 52d8f88084..17217c3f3b 100644
--- a/catalyst_voices_packages/catalyst_cardano_serialization/test/transaction_test.dart
+++ b/catalyst_voices_packages/catalyst_cardano_serialization/test/transaction_test.dart
@@ -7,32 +7,111 @@ import 'test_utils/test_data.dart';
 
 void main() {
   group(Transaction, () {
-    test('transaction with all supported fields serialized to bytes', () {
-      final bytes = cbor.encode(fullTestTransaction().toCbor());
-      final hexString = hex.encode(bytes);
-
-      expect(
-        hexString,
-        equals(
-          '84a40081825820583a3a5150bc7990656020ffb4e5a1be1589ce6f1a430aacb8e7e0'
-          '89b894d3d101018182581d609493315cd92eb5d8c4304e67b7e16ae36d61d3450269'
-          '4657811a2c8e1a004c4b40021a009896800319a029a0f5a1016454657374',
-        ),
+    test('full signed transaction serialized to cbor', () {
+      _testTransactionSerialization(
+        fullSignedTestTransaction(),
+        '84a600818258204c1fbc5433ec764164945d736a09dc087d59ff30e64d26d462ff'
+        '8570cd4be9a700018282581d6082e016828989cd9d809b50d6976d9efa9bc5b2c1'
+        'a78d4b3bfa1bb83b1a000f424082583900c035332d2dcba35744e880729198459e'
+        '32c50eb3e179b1fa2247348c80b846ad416f120db94c1a401992950b11b9bc7d65'
+        'dbb3424c0f8de41b0000000253fa14bb021a00028d050319a0e907582057b9d497'
+        '6bc8017e5b95c6996bac1749765e188c990b5c705a65c78f8349227d0f00a10081'
+        '8258203311ca404fcf22c91d607ace285d70e2263a1b81745c39673080329bd1a3'
+        'f56e5840f5eb006f048fdfa9b81b0fe3abee1ce1f1a75789dc21088b23ebf95c76'
+        'b050ad157a497999e083e1957c2a3d730a07a5b2aef4a755783c9ce778c02c4a08'
+        '970ff5a40164546573740246aabbccddeeff031903e50482a50081825820afcf84'
+        '97561065afe1ca623823508753cc580eb575ac8f1d6cfaa18c3ceeac0100018182'
+        '58390080f9e2c88e6c817008f3a812ed889b4a4da8e0bd103f86e7335422aa122a'
+        '946b9ad3d2ddf029d3a828f0468aece76895f15c9efbd69b42771a00df1560021a'
+        '0002e63003182f075820bdc2b27e6869aa9a5fa23a1f1fd3a87025d8703df4fd7b'
+        '120d058c839dc0415c82a10141aa80',
       );
     });
 
-    test('transaction with required fields serialized to bytes', () {
-      final bytes = cbor.encode(minimalTestTransaction().toCbor());
-      final hexString = hex.encode(bytes);
+    test('full signed transaction serialized to and from cbor', () {
+      _testTransactionSerializationRoundTrip(fullSignedTestTransaction());
+    });
+
+    test('full unsigned transaction serialized to cbor', () {
+      _testTransactionSerialization(
+        fullUnsignedTestTransaction(),
+        '84a600818258204c1fbc5433ec764164945d736a09dc087d59ff30e64d26d462ff'
+        '8570cd4be9a700018282581d6082e016828989cd9d809b50d6976d9efa9bc5b2c1'
+        'a78d4b3bfa1bb83b1a000f424082583900c035332d2dcba35744e880729198459e'
+        '32c50eb3e179b1fa2247348c80b846ad416f120db94c1a401992950b11b9bc7d65'
+        'dbb3424c0f8de41b0000000253fa14bb021a00028d050319a0e907582057b9d497'
+        '6bc8017e5b95c6996bac1749765e188c990b5c705a65c78f8349227d0f00a0f5a4'
+        '0164546573740246aabbccddeeff031903e50482a50081825820afcf8497561065'
+        'afe1ca623823508753cc580eb575ac8f1d6cfaa18c3ceeac010001818258390080'
+        'f9e2c88e6c817008f3a812ed889b4a4da8e0bd103f86e7335422aa122a946b9ad3'
+        'd2ddf029d3a828f0468aece76895f15c9efbd69b42771a00df1560021a0002e630'
+        '03182f075820bdc2b27e6869aa9a5fa23a1f1fd3a87025d8703df4fd7b120d058c'
+        '839dc0415c82a10141aa80',
+      );
+    });
+
+    test('full unsigned transaction serialized to and from cbor', () {
+      _testTransactionSerializationRoundTrip(fullUnsignedTestTransaction());
+    });
 
-      expect(
-        hexString,
-        equals(
-          '84a30081825820583a3a5150bc7990656020ffb4e5a1be1589ce6f1a430aacb8e7e0'
-          '89b894d3d101018182581d609493315cd92eb5d8c4304e67b7e16ae36d61d3450269'
-          '4657811a2c8e1a004c4b40021a00989680a0f5d90103a0',
-        ),
+    test('minimal signed transaction serialized to cbor', () {
+      _testTransactionSerialization(
+        minimalSignedTestTransaction(),
+        '84a300818258204c1fbc5433ec764164945d736a09dc087d59ff30e64d26d462ff85'
+        '70cd4be9a700018282581d6082e016828989cd9d809b50d6976d9efa9bc5b2c1a78d'
+        '4b3bfa1bb83b1a000f424082583900c035332d2dcba35744e880729198459e32c50e'
+        'b3e179b1fa2247348c80b846ad416f120db94c1a401992950b11b9bc7d65dbb3424c'
+        '0f8de41b0000000253fa156b021a00028c55a100818258203311ca404fcf22c91d60'
+        '7ace285d70e2263a1b81745c39673080329bd1a3f56e584085b3a67a0529c95a740f'
+        'd643e2998f03f251268ca603a0778b6631966b9a43fd2e02fa907c610ecc985b375f'
+        'a9852c14789dacd2ab7897b445efe4f4b0f60a06f5d90103a0',
+      );
+    });
+
+    test('minimal signed transaction serialized to and from cbor', () {
+      _testTransactionSerializationRoundTrip(
+        minimalSignedTestTransaction(),
+      );
+    });
+
+    test('minimal unsigned transaction serialized to and from cbor', () {
+      _testTransactionSerializationRoundTrip(fullUnsignedTestTransaction());
+    });
+
+    test('minimal unsigned transaction serialized to cbor', () {
+      _testTransactionSerialization(
+        minimalUnsignedTestTransaction(),
+        '84a300818258204c1fbc5433ec764164945d736a09dc087d59ff30e64d26d4'
+        '62ff8570cd4be9a700018282581d6082e016828989cd9d809b50d6976d9efa'
+        '9bc5b2c1a78d4b3bfa1bb83b1a000f424082583900c035332d2dcba35744e8'
+        '80729198459e32c50eb3e179b1fa2247348c80b846ad416f120db94c1a4019'
+        '92950b11b9bc7d65dbb3424c0f8de41b0000000253fa156b021a00028c55a0'
+        'f5d90103a0',
+      );
+    });
+
+    test('minimal unsigned transaction serialized to and from cbor', () {
+      _testTransactionSerializationRoundTrip(
+        minimalUnsignedTestTransaction(),
       );
     });
   });
 }
+
+void _testTransactionSerializationRoundTrip(Transaction transaction) {
+  final hex1 = hex.encode(cbor.encode(transaction.toCbor()));
+  final tx1 = Transaction.fromCbor(cbor.decode(hex.decode(hex1)));
+  final hex2 = hex.encode(cbor.encode(tx1.toCbor()));
+
+  expect(hex1, equals(hex2));
+}
+
+void _testTransactionSerialization(
+  Transaction transaction,
+  String expectedHex,
+) {
+  final bytes = cbor.encode(transaction.toCbor());
+  final hexString = hex.encode(bytes);
+
+  expect(hexString, equals(expectedHex));
+}