diff --git a/src/bench/string_cast.cpp b/src/bench/string_cast.cpp
index e08356433a..655a63a598 100644
--- a/src/bench/string_cast.cpp
+++ b/src/bench/string_cast.cpp
@@ -18,8 +18,9 @@ std::string NumberToString(T Number){
 
 static void int_atoi(benchmark::Bench& bench)
 {
+    int value;
     bench.run([&] {
-        atoi("1");
+        value = atoi("1");
     });
 }
 
diff --git a/src/bls/bls_worker.cpp b/src/bls/bls_worker.cpp
index a0b73606fc..9ddaa1c7a8 100644
--- a/src/bls/bls_worker.cpp
+++ b/src/bls/bls_worker.cpp
@@ -154,8 +154,8 @@ struct Aggregator : public std::enable_shared_from_this<Aggregator<T>> {
                bool _parallel,
                ctpl::thread_pool& _workerPool,
                DoneCallback _doneCallback) :
-            workerPool(_workerPool),
             parallel(_parallel),
+            workerPool(_workerPool),
             doneCallback(std::move(_doneCallback))
     {
         inputVec = std::make_shared<std::vector<const T*> >(count);
@@ -342,7 +342,7 @@ struct VectorAggregator : public std::enable_shared_from_this<VectorAggregator<T
     bool parallel;
     ctpl::thread_pool& workerPool;
 
-    std::atomic<size_t> doneCount;
+    std::atomic<size_t> doneCount{0};
 
     VectorPtrType result;
     size_t vecSize;
@@ -351,13 +351,12 @@ struct VectorAggregator : public std::enable_shared_from_this<VectorAggregator<T
                      size_t _start, size_t _count,
                      bool _parallel, ctpl::thread_pool& _workerPool,
                      DoneCallback _doneCallback) :
+            doneCallback(std::move(_doneCallback)),
             vecs(_vecs),
-            parallel(_parallel),
             start(_start),
             count(_count),
-            workerPool(_workerPool),
-            doneCallback(std::move(_doneCallback)),
-            doneCount(0)
+            parallel(_parallel),
+            workerPool(_workerPool)
     {
         assert(!vecs.empty());
         vecSize = vecs[0]->size();
@@ -417,7 +416,7 @@ struct ContributionVerifier : public std::enable_shared_from_this<ContributionVe
 
     ctpl::thread_pool& workerPool;
 
-    size_t batchCount;
+    size_t batchCount{1};
     size_t verifyCount;
 
     std::vector<BatchState> batchStates;
@@ -435,9 +434,8 @@ struct ContributionVerifier : public std::enable_shared_from_this<ContributionVe
         parallel(_parallel),
         aggregated(_aggregated),
         workerPool(_workerPool),
-        doneCallback(std::move(_doneCallback)),
-        batchCount(1),
-        verifyCount(_vvecs.size())
+        verifyCount(_vvecs.size()),
+        doneCallback(std::move(_doneCallback))
     {
     }
 
diff --git a/src/coinjoin/client.h b/src/coinjoin/client.h
index 0268602628..ce795da096 100644
--- a/src/coinjoin/client.h
+++ b/src/coinjoin/client.h
@@ -180,14 +180,14 @@ private:
 
     bool fMixing{false};
 
-    int nCachedLastSuccessBlock;
-    int nMinBlocksToWait; // how many blocks to wait for after one successful mixing tx in non-multisession mode
+    int nCachedLastSuccessBlock{0};
+    int nMinBlocksToWait{1}; // how many blocks to wait for after one successful mixing tx in non-multisession mode
     std::string strAutoDenomResult;
 
     CWallet& mixingWallet;
 
     // Keep track of current block height
-    int nCachedBlockHeight;
+    int nCachedBlockHeight{0};
 
     bool WaitForAnotherBlock() const;
 
@@ -195,25 +195,15 @@ private:
     bool CheckAutomaticBackup();
 
 public:
-    int nCachedNumBlocks;    // used for the overview screen
-    bool fCreateAutoBackups; // builtin support for automatic backups
+    int nCachedNumBlocks{std::numeric_limits<int>::max()};    // used for the overview screen
+    bool fCreateAutoBackups{true}; // builtin support for automatic backups
 
     CCoinJoinClientManager() = delete;
     CCoinJoinClientManager(CCoinJoinClientManager const&) = delete;
     CCoinJoinClientManager& operator=(CCoinJoinClientManager const&) = delete;
 
     explicit CCoinJoinClientManager(CWallet& wallet) :
-        vecMasternodesUsed(),
-        deqSessions(),
-        nCachedLastSuccessBlock(0),
-        nMinBlocksToWait(1),
-        strAutoDenomResult(),
-        nCachedBlockHeight(0),
-        nCachedNumBlocks(std::numeric_limits<int>::max()),
-        fCreateAutoBackups(true),
-        mixingWallet(wallet)
-    {
-    }
+        mixingWallet(wallet) {}
 
     void ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vRecv, CConnman& connman, bool enable_bip61);
 
diff --git a/src/interfaces/wallet.cpp b/src/interfaces/wallet.cpp
index 896ddf707a..bb49f9bf73 100644
--- a/src/interfaces/wallet.cpp
+++ b/src/interfaces/wallet.cpp
@@ -188,7 +188,6 @@ public:
 class WalletImpl : public Wallet
 {
 public:
-    CoinJoinImpl m_coinjoin;
 
     explicit WalletImpl(const std::shared_ptr<CWallet>& wallet) : m_wallet(wallet), m_coinjoin(wallet) {}
 
@@ -592,6 +591,7 @@ public:
     }
 
     std::shared_ptr<CWallet> m_wallet;
+    CoinJoinImpl m_coinjoin;
 };
 
 class WalletClientImpl : public ChainClient
diff --git a/src/llmq/dkgsessionhandler.cpp b/src/llmq/dkgsessionhandler.cpp
index 82b7ea48a6..d0af4e6225 100644
--- a/src/llmq/dkgsessionhandler.cpp
+++ b/src/llmq/dkgsessionhandler.cpp
@@ -21,8 +21,8 @@ namespace llmq
 {
 
 CDKGPendingMessages::CDKGPendingMessages(size_t _maxMessagesPerNode, int _invType) :
-    maxMessagesPerNode(_maxMessagesPerNode),
-    invType(_invType)
+    invType(_invType),
+    maxMessagesPerNode(_maxMessagesPerNode)
 {
 }
 
diff --git a/src/qt/appearancewidget.cpp b/src/qt/appearancewidget.cpp
index 25d6ade491..e74e91ba1b 100644
--- a/src/qt/appearancewidget.cpp
+++ b/src/qt/appearancewidget.cpp
@@ -20,13 +20,7 @@
 
 AppearanceWidget::AppearanceWidget(QWidget* parent) :
     QWidget(parent),
-    ui(new Ui::AppearanceWidget),
-    fAcceptChanges(false),
-    prevTheme(GUIUtil::getActiveTheme()),
-    prevFontFamily(GUIUtil::getFontFamily()),
-    prevScale(GUIUtil::getFontScale()),
-    prevWeightNormal(GUIUtil::getFontWeightNormal()),
-    prevWeightBold(GUIUtil::getFontWeightBold())
+    ui{new Ui::AppearanceWidget()}
 {
     ui->setupUi(this);
 
diff --git a/src/qt/appearancewidget.h b/src/qt/appearancewidget.h
index 632750d472..2aea003d6f 100644
--- a/src/qt/appearancewidget.h
+++ b/src/qt/appearancewidget.h
@@ -46,12 +46,12 @@ private:
     Ui::AppearanceWidget* ui;
     QDataWidgetMapper* mapper;
     OptionsModel* model;
-    bool fAcceptChanges;
-    QString prevTheme;
-    int prevScale;
-    GUIUtil::FontFamily prevFontFamily;
-    QFont::Weight prevWeightNormal;
-    QFont::Weight prevWeightBold;
+    bool fAcceptChanges{false};
+    QString prevTheme{GUIUtil::getActiveTheme()};
+    int prevScale{GUIUtil::getFontScale()};
+    GUIUtil::FontFamily prevFontFamily{GUIUtil::getFontFamily()};
+    QFont::Weight prevWeightNormal{GUIUtil::getFontWeightNormal()};
+    QFont::Weight prevWeightBold{GUIUtil::getFontWeightBold()};
 
     void updateWeightSlider(bool fForce = false);
 };
diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
index e898faedcc..14c7c86c9c 100644
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -81,8 +81,8 @@ const std::string BitcoinGUI::DEFAULT_UIPLATFORM =
 BitcoinGUI::BitcoinGUI(interfaces::Node& node, const NetworkStyle* networkStyle, QWidget* parent) :
     QMainWindow(parent),
     m_node(node),
-    m_network_style(networkStyle),
-    trayIconMenu{new QMenu()}
+    trayIconMenu{new QMenu()},
+    m_network_style(networkStyle)
 {
     GUIUtil::loadTheme(true);
 
diff --git a/src/qt/masternodelist.cpp b/src/qt/masternodelist.cpp
index b0cb336127..824f328fac 100644
--- a/src/qt/masternodelist.cpp
+++ b/src/qt/masternodelist.cpp
@@ -44,13 +44,7 @@ public:
 
 MasternodeList::MasternodeList(QWidget* parent) :
     QWidget(parent),
-    ui(new Ui::MasternodeList),
-    clientModel(0),
-    walletModel(0),
-    fFilterUpdatedDIP3(true),
-    nTimeFilterUpdatedDIP3(0),
-    nTimeUpdatedDIP3(0),
-    mnListChanged(true)
+    ui(new Ui::MasternodeList)
 {
     ui->setupUi(this);
 
diff --git a/src/qt/masternodelist.h b/src/qt/masternodelist.h
index 40203d2de4..acfd100742 100644
--- a/src/qt/masternodelist.h
+++ b/src/qt/masternodelist.h
@@ -56,21 +56,21 @@ public:
 
 private:
     QMenu* contextMenuDIP3;
-    int64_t nTimeFilterUpdatedDIP3;
-    int64_t nTimeUpdatedDIP3;
-    bool fFilterUpdatedDIP3;
+    int64_t nTimeFilterUpdatedDIP3{0};
+    int64_t nTimeUpdatedDIP3{0};
+    bool fFilterUpdatedDIP3{true};
 
     QTimer* timer;
     Ui::MasternodeList* ui;
-    ClientModel* clientModel;
-    WalletModel* walletModel;
+    ClientModel* clientModel{nullptr};
+    WalletModel* walletModel{nullptr};
 
     // Protects tableWidgetMasternodesDIP3
     CCriticalSection cs_dip3list;
 
     QString strCurrentFilterDIP3;
 
-    bool mnListChanged;
+    bool mnListChanged{true};
 
     CDeterministicMNCPtr GetSelectedDIP3MN();
 
diff --git a/src/qt/paymentserver.cpp b/src/qt/paymentserver.cpp
index dc9031bbbb..ac1b298a65 100644
--- a/src/qt/paymentserver.cpp
+++ b/src/qt/paymentserver.cpp
@@ -196,11 +196,11 @@ bool PaymentServer::ipcSendCommandLine()
 
 PaymentServer::PaymentServer(QObject* parent, bool startLocalServer) :
     QObject(parent),
-    saveURIs(true),
-    uriServer(nullptr),
 #ifdef ENABLE_BIP70
     netManager(nullptr),
 #endif
+    saveURIs(true),
+    uriServer(nullptr),
     optionsModel(nullptr)
 {
 #ifdef ENABLE_BIP70
diff --git a/src/qt/paymentserver.h b/src/qt/paymentserver.h
index cb66d15229..862d132a3d 100644
--- a/src/qt/paymentserver.h
+++ b/src/qt/paymentserver.h
@@ -142,10 +142,6 @@ protected:
     bool eventFilter(QObject *object, QEvent *event) override;
 
 private:
-    bool saveURIs;                      // true during startup
-    QLocalServer* uriServer;
-    OptionsModel *optionsModel;
-
 #ifdef ENABLE_BIP70
     static bool readPaymentRequestFromFile(const QString& filename, PaymentRequestPlus& request);
     bool processPaymentRequest(const PaymentRequestPlus& request, SendCoinsRecipient& recipient);
@@ -155,6 +151,10 @@ private:
     void initNetManager();
     QNetworkAccessManager* netManager;  // Used to fetch payment requests
 #endif
+
+    bool saveURIs;                      // true during startup
+    QLocalServer* uriServer;
+    OptionsModel *optionsModel;
 };
 
 #endif // BITCOIN_QT_PAYMENTSERVER_H
diff --git a/src/rpc/masternode.cpp b/src/rpc/masternode.cpp
index 9d7f9f765c..602f0b754a 100644
--- a/src/rpc/masternode.cpp
+++ b/src/rpc/masternode.cpp
@@ -439,7 +439,7 @@ static UniValue masternode_payments(const JSONRPCRequest& request)
     // A temporary vector which is used to sort results properly (there is no "reverse" in/for UniValue)
     std::vector<UniValue> vecPayments;
 
-    while (vecPayments.size() < std::abs(nCount) != 0 && pindex != nullptr) {
+    while (vecPayments.size() < std::abs(nCount) && pindex != nullptr) {
 
         CBlock block;
         if (!ReadBlockFromDisk(block, pindex, Params().GetConsensus())) {
diff --git a/src/test/cachemultimap_tests.cpp b/src/test/cachemultimap_tests.cpp
index 0deffa04ab..1fa2cd0e13 100644
--- a/src/test/cachemultimap_tests.cpp
+++ b/src/test/cachemultimap_tests.cpp
@@ -11,15 +11,6 @@
 
 BOOST_FIXTURE_TEST_SUITE(cachemultimap_tests, BasicTestingSetup)
 
-static void DumpMap(const CacheMultiMap<int,int>& cmmap)
-{
-    const CacheMultiMap<int,int>::list_t& listItems = cmmap.GetItemList();
-    for(CacheMultiMap<int,int>::list_cit it = listItems.begin(); it != listItems.end(); ++it) {
-        const CacheItem<int,int>& item = *it;
-        std::cout << item.key << " : " << item.value << std::endl;
-    }
-}
-
 static bool Compare(const CacheMultiMap<int,int>& cmmap1, const CacheMultiMap<int,int>& cmmap2)
 {
     if(cmmap1.GetMaxSize() != cmmap2.GetMaxSize()) {
diff --git a/src/validation.cpp b/src/validation.cpp
index 31c06e0359..021323b17d 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -162,8 +162,6 @@ CBlockPolicyEstimator feeEstimator;
 CTxMemPool mempool(&feeEstimator);
 std::atomic_bool g_is_mempool_loaded{false};
 
-static void CheckBlockIndex(const Consensus::Params& consensusParams);
-
 // Internal stuff
 namespace {
     CBlockIndex* pindexBestInvalid = nullptr;
diff --git a/src/validation.h b/src/validation.h
index 025e54f66c..949b07c953 100644
--- a/src/validation.h
+++ b/src/validation.h
@@ -263,9 +263,6 @@ void PruneBlockFilesManual(int nManualPruneHeight);
 bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransactionRef &tx,
                         bool* pfMissingInputs, bool bypass_limits,
                         const CAmount nAbsurdFee, bool test_accept=false) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
-static bool AcceptToMemoryPoolWithTime(const CChainParams& chainparams, CTxMemPool& pool, CValidationState &state, const CTransactionRef &tx,
-                                       bool* pfMissingInputs, int64_t nAcceptTime, bool bypass_limits,
-                                       const CAmount nAbsurdFee, bool test_accept = false);
 
 bool GetUTXOCoin(const COutPoint& outpoint, Coin& coin);
 int GetUTXOHeight(const COutPoint& outpoint);