diff --git a/ci/test/06_script_b.sh b/ci/test/06_script_b.sh
index b60c9b6d30..f6de2f4016 100755
--- a/ci/test/06_script_b.sh
+++ b/ci/test/06_script_b.sh
@@ -47,6 +47,7 @@ if [ "${RUN_TIDY}" = "true" ]; then
           " src/policy/feerate.cpp"\
           " src/policy/packages.cpp"\
           " src/policy/settings.cpp"\
+          " src/primitives/transaction.cpp"\
           " src/rpc/fees.cpp"\
           " src/rpc/signmessage.cpp"\
           " src/test/fuzz/txorphan.cpp"\
diff --git a/src/primitives/transaction.cpp b/src/primitives/transaction.cpp
index f7f6ae4480..ec48194ee9 100644
--- a/src/primitives/transaction.cpp
+++ b/src/primitives/transaction.cpp
@@ -7,10 +7,15 @@
 
 #include <consensus/amount.h>
 #include <hash.h>
+#include <script/script.h>
+#include <serialize.h>
 #include <tinyformat.h>
+#include <uint256.h>
 #include <util/strencodings.h>
+#include <version.h>
 
-#include <assert.h>
+#include <cassert>
+#include <stdexcept>
 
 std::string COutPoint::ToString() const
 {
diff --git a/src/primitives/transaction.h b/src/primitives/transaction.h
index fb98fb6868..f496ea022e 100644
--- a/src/primitives/transaction.h
+++ b/src/primitives/transaction.h
@@ -6,13 +6,21 @@
 #ifndef BITCOIN_PRIMITIVES_TRANSACTION_H
 #define BITCOIN_PRIMITIVES_TRANSACTION_H
 
-#include <stdint.h>
 #include <consensus/amount.h>
+#include <prevector.h>
 #include <script/script.h>
 #include <serialize.h>
 #include <uint256.h>
 
+#include <cstddef>
+#include <cstdint>
+#include <ios>
+#include <limits>
+#include <memory>
+#include <string>
 #include <tuple>
+#include <utility>
+#include <vector>
 
 /**
  * A flag that is ORed into the protocol version to designate that a transaction
@@ -303,7 +311,7 @@ private:
 public:
     /** Convert a CMutableTransaction into a CTransaction. */
     explicit CTransaction(const CMutableTransaction& tx);
-    CTransaction(CMutableTransaction&& tx);
+    explicit CTransaction(CMutableTransaction&& tx);
 
     template <typename Stream>
     inline void Serialize(Stream& s) const {
@@ -368,7 +376,7 @@ struct CMutableTransaction
     int32_t nVersion;
     uint32_t nLockTime;
 
-    CMutableTransaction();
+    explicit CMutableTransaction();
     explicit CMutableTransaction(const CTransaction& tx);
 
     template <typename Stream>
diff --git a/src/test/script_tests.cpp b/src/test/script_tests.cpp
index fbcf1f14ef..9e7a376d6b 100644
--- a/src/test/script_tests.cpp
+++ b/src/test/script_tests.cpp
@@ -1514,8 +1514,8 @@ BOOST_AUTO_TEST_CASE(bitcoinconsensus_verify_script_returns_true)
     CScriptWitness wit;
 
     scriptPubKey << OP_1;
-    CTransaction creditTx = BuildCreditingTransaction(scriptPubKey, 1);
-    CTransaction spendTx = BuildSpendingTransaction(scriptSig, wit, creditTx);
+    CTransaction creditTx{BuildCreditingTransaction(scriptPubKey, 1)};
+    CTransaction spendTx{BuildSpendingTransaction(scriptSig, wit, creditTx)};
 
     CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
     stream << spendTx;
@@ -1537,8 +1537,8 @@ BOOST_AUTO_TEST_CASE(bitcoinconsensus_verify_script_tx_index_err)
     CScriptWitness wit;
 
     scriptPubKey << OP_EQUAL;
-    CTransaction creditTx = BuildCreditingTransaction(scriptPubKey, 1);
-    CTransaction spendTx = BuildSpendingTransaction(scriptSig, wit, creditTx);
+    CTransaction creditTx{BuildCreditingTransaction(scriptPubKey, 1)};
+    CTransaction spendTx{BuildSpendingTransaction(scriptSig, wit, creditTx)};
 
     CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
     stream << spendTx;
@@ -1560,8 +1560,8 @@ BOOST_AUTO_TEST_CASE(bitcoinconsensus_verify_script_tx_size)
     CScriptWitness wit;
 
     scriptPubKey << OP_EQUAL;
-    CTransaction creditTx = BuildCreditingTransaction(scriptPubKey, 1);
-    CTransaction spendTx = BuildSpendingTransaction(scriptSig, wit, creditTx);
+    CTransaction creditTx{BuildCreditingTransaction(scriptPubKey, 1)};
+    CTransaction spendTx{BuildSpendingTransaction(scriptSig, wit, creditTx)};
 
     CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
     stream << spendTx;
@@ -1583,8 +1583,8 @@ BOOST_AUTO_TEST_CASE(bitcoinconsensus_verify_script_tx_serialization)
     CScriptWitness wit;
 
     scriptPubKey << OP_EQUAL;
-    CTransaction creditTx = BuildCreditingTransaction(scriptPubKey, 1);
-    CTransaction spendTx = BuildSpendingTransaction(scriptSig, wit, creditTx);
+    CTransaction creditTx{BuildCreditingTransaction(scriptPubKey, 1)};
+    CTransaction spendTx{BuildSpendingTransaction(scriptSig, wit, creditTx)};
 
     CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
     stream << 0xffffffff;
@@ -1606,8 +1606,8 @@ BOOST_AUTO_TEST_CASE(bitcoinconsensus_verify_script_amount_required_err)
     CScriptWitness wit;
 
     scriptPubKey << OP_EQUAL;
-    CTransaction creditTx = BuildCreditingTransaction(scriptPubKey, 1);
-    CTransaction spendTx = BuildSpendingTransaction(scriptSig, wit, creditTx);
+    CTransaction creditTx{BuildCreditingTransaction(scriptPubKey, 1)};
+    CTransaction spendTx{BuildSpendingTransaction(scriptSig, wit, creditTx)};
 
     CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
     stream << spendTx;
@@ -1629,8 +1629,8 @@ BOOST_AUTO_TEST_CASE(bitcoinconsensus_verify_script_invalid_flags)
     CScriptWitness wit;
 
     scriptPubKey << OP_EQUAL;
-    CTransaction creditTx = BuildCreditingTransaction(scriptPubKey, 1);
-    CTransaction spendTx = BuildSpendingTransaction(scriptSig, wit, creditTx);
+    CTransaction creditTx{BuildCreditingTransaction(scriptPubKey, 1)};
+    CTransaction spendTx{BuildSpendingTransaction(scriptSig, wit, creditTx)};
 
     CDataStream stream(SER_NETWORK, PROTOCOL_VERSION);
     stream << spendTx;