diff --git a/src/test/test_bitcoin.h b/src/test/test_bitcoin.h
--- a/src/test/test_bitcoin.h
+++ b/src/test/test_bitcoin.h
@@ -104,7 +104,7 @@
     ~TestChain100Setup();
 
     // For convenience, coinbase transactions.
-    std::vector<CTransaction> coinbaseTxns;
+    std::vector<CTransaction> m_coinbase_txns;
     // private/public key needed to spend coinbase transactions.
     CKey coinbaseKey;
 };
diff --git a/src/test/test_bitcoin.cpp b/src/test/test_bitcoin.cpp
--- a/src/test/test_bitcoin.cpp
+++ b/src/test/test_bitcoin.cpp
@@ -155,7 +155,7 @@
     for (int i = 0; i < COINBASE_MATURITY; i++) {
         std::vector<CMutableTransaction> noTxns;
         CBlock b = CreateAndProcessBlock(noTxns, scriptPubKey);
-        coinbaseTxns.push_back(*b.vtx[0]);
+        m_coinbase_txns.push_back(*b.vtx[0]);
     }
 }
 
diff --git a/src/test/txindex_tests.cpp b/src/test/txindex_tests.cpp
--- a/src/test/txindex_tests.cpp
+++ b/src/test/txindex_tests.cpp
@@ -20,7 +20,7 @@
     uint256 block_hash;
 
     // Transaction should not be found in the index before it is started.
-    for (const auto &txn : coinbaseTxns) {
+    for (const auto &txn : m_coinbase_txns) {
         BOOST_CHECK(!txindex.FindTx(txn.GetHash(), block_hash, tx_disk));
     }
 
@@ -39,7 +39,7 @@
     }
 
     // Check that txindex has all txs that were in the chain before it started.
-    for (const auto &txn : coinbaseTxns) {
+    for (const auto &txn : m_coinbase_txns) {
         if (!txindex.FindTx(txn.GetHash(), block_hash, tx_disk)) {
             BOOST_ERROR("FindTx failed");
         } else if (tx_disk->GetHash() != txn.GetHash()) {
diff --git a/src/test/txvalidationcache_tests.cpp b/src/test/txvalidationcache_tests.cpp
--- a/src/test/txvalidationcache_tests.cpp
+++ b/src/test/txvalidationcache_tests.cpp
@@ -47,7 +47,7 @@
     for (int i = 0; i < 2; i++) {
         spends[i].nVersion = 1;
         spends[i].vin.resize(1);
-        spends[i].vin[0].prevout = COutPoint(coinbaseTxns[0].GetId(), 0);
+        spends[i].vin[0].prevout = COutPoint(m_coinbase_txns[0].GetId(), 0);
         spends[i].vout.resize(1);
         spends[i].vout[0].nValue = 11 * CENT;
         spends[i].vout[0].scriptPubKey = scriptPubKey;
@@ -56,7 +56,7 @@
         std::vector<uint8_t> vchSig;
         uint256 hash = SignatureHash(scriptPubKey, CTransaction(spends[i]), 0,
                                      SigHashType().withForkId(),
-                                     coinbaseTxns[0].vout[0].nValue);
+                                     m_coinbase_txns[0].vout[0].nValue);
         BOOST_CHECK(coinbaseKey.SignECDSA(hash, vchSig));
         vchSig.push_back(uint8_t(SIGHASH_ALL | SIGHASH_FORKID));
         spends[i].vin[0].scriptSig << vchSig;
@@ -178,7 +178,7 @@
         mutableFunding_tx.nVersion = 1;
         mutableFunding_tx.vin.resize(1);
         mutableFunding_tx.vin[0].prevout =
-            COutPoint(coinbaseTxns[0].GetId(), 0);
+            COutPoint(m_coinbase_txns[0].GetId(), 0);
         mutableFunding_tx.vout.resize(1);
         mutableFunding_tx.vout[0].nValue = 50 * COIN;
 
@@ -191,7 +191,7 @@
         std::vector<uint8_t> nullDummyVchSig;
         uint256 nulldummySigHash = SignatureHash(
             p2pk_scriptPubKey, CTransaction(mutableFunding_tx), 0,
-            SigHashType().withForkId(), coinbaseTxns[0].vout[0].nValue);
+            SigHashType().withForkId(), m_coinbase_txns[0].vout[0].nValue);
         BOOST_CHECK(coinbaseKey.SignECDSA(nulldummySigHash, nullDummyVchSig));
         nullDummyVchSig.push_back(uint8_t(SIGHASH_ALL | SIGHASH_FORKID));
         mutableFunding_tx.vin[0].scriptSig << nullDummyVchSig;
diff --git a/src/wallet/test/wallet_tests.cpp b/src/wallet/test/wallet_tests.cpp
--- a/src/wallet/test/wallet_tests.cpp
+++ b/src/wallet/test/wallet_tests.cpp
@@ -126,11 +126,11 @@
     // will pick up both blocks, not just the first.
     const int64_t BLOCK_TIME = chainActive.Tip()->GetBlockTimeMax() + 5;
     SetMockTime(BLOCK_TIME);
-    coinbaseTxns.emplace_back(
+    m_coinbase_txns.emplace_back(
         *CreateAndProcessBlock({},
                                GetScriptForRawPubKey(coinbaseKey.GetPubKey()))
              .vtx[0]);
-    coinbaseTxns.emplace_back(
+    m_coinbase_txns.emplace_back(
         *CreateAndProcessBlock({},
                                GetScriptForRawPubKey(coinbaseKey.GetPubKey()))
              .vtx[0]);
@@ -139,7 +139,7 @@
     // rescan will start at the block time.
     const int64_t KEY_TIME = BLOCK_TIME + TIMESTAMP_WINDOW;
     SetMockTime(KEY_TIME);
-    coinbaseTxns.emplace_back(
+    m_coinbase_txns.emplace_back(
         *CreateAndProcessBlock({},
                                GetScriptForRawPubKey(coinbaseKey.GetPubKey()))
              .vtx[0]);
@@ -174,9 +174,9 @@
 
         LOCK(wallet.cs_wallet);
         BOOST_CHECK_EQUAL(wallet.mapWallet.size(), 3);
-        BOOST_CHECK_EQUAL(coinbaseTxns.size(), 103);
-        for (size_t i = 0; i < coinbaseTxns.size(); ++i) {
-            bool found = wallet.GetWalletTx(coinbaseTxns[i].GetId());
+        BOOST_CHECK_EQUAL(m_coinbase_txns.size(), 103);
+        for (size_t i = 0; i < m_coinbase_txns.size(); ++i) {
+            bool found = wallet.GetWalletTx(m_coinbase_txns[i].GetId());
             bool expected = i >= 100;
             BOOST_CHECK_EQUAL(found, expected);
         }
@@ -194,7 +194,7 @@
 // debit functions.
 BOOST_FIXTURE_TEST_CASE(coin_mark_dirty_immature_credit, TestChain100Setup) {
     CWallet wallet(Params(), "dummy", CWalletDBWrapper::CreateDummy());
-    CWalletTx wtx(&wallet, MakeTransactionRef(coinbaseTxns.back()));
+    CWalletTx wtx(&wallet, MakeTransactionRef(m_coinbase_txns.back()));
     LOCK2(cs_main, wallet.cs_wallet);
     wtx.hashBlock = chainActive.Tip()->GetBlockHash();
     wtx.nIndex = 0;