diff --git a/src/bench/bench.h b/src/bench/bench.h
index e15cb8186..5d131c2aa 100644
--- a/src/bench/bench.h
+++ b/src/bench/bench.h
@@ -111,9 +111,9 @@ public:
 class ConsolePrinter : public Printer
 {
 public:
-    void header();
-    void result(const State& state);
-    void footer();
+    void header() override;
+    void result(const State& state) override;
+    void footer() override;
 };
 
 // creates box plot with plotly.js
@@ -121,9 +121,9 @@ class PlotlyPrinter : public Printer
 {
 public:
     PlotlyPrinter(std::string plotly_url, int64_t width, int64_t height);
-    void header();
-    void result(const State& state);
-    void footer();
+    void header() override;
+    void result(const State& state) override;
+    void footer() override;
 
 private:
     std::string m_plotly_url;
diff --git a/src/test/validation_block_tests.cpp b/src/test/validation_block_tests.cpp
index f83557016..37c4f7913 100644
--- a/src/test/validation_block_tests.cpp
+++ b/src/test/validation_block_tests.cpp
@@ -25,12 +25,12 @@ struct TestSubscriber : public CValidationInterface {
 
     TestSubscriber(uint256 tip) : m_expected_tip(tip) {}
 
-    void UpdatedBlockTip(const CBlockIndex* pindexNew, const CBlockIndex* pindexFork, bool fInitialDownload)
+    void UpdatedBlockTip(const CBlockIndex* pindexNew, const CBlockIndex* pindexFork, bool fInitialDownload) override
     {
         BOOST_CHECK_EQUAL(m_expected_tip, pindexNew->GetBlockHash());
     }
 
-    void BlockConnected(const std::shared_ptr<const CBlock>& block, const CBlockIndex* pindex, const std::vector<CTransactionRef>& txnConflicted)
+    void BlockConnected(const std::shared_ptr<const CBlock>& block, const CBlockIndex* pindex, const std::vector<CTransactionRef>& txnConflicted) override
     {
         BOOST_CHECK_EQUAL(m_expected_tip, block->hashPrevBlock);
         BOOST_CHECK_EQUAL(m_expected_tip, pindex->pprev->GetBlockHash());
@@ -38,7 +38,7 @@ struct TestSubscriber : public CValidationInterface {
         m_expected_tip = block->GetHash();
     }
 
-    void BlockDisconnected(const std::shared_ptr<const CBlock>& block)
+    void BlockDisconnected(const std::shared_ptr<const CBlock>& block) override
     {
         BOOST_CHECK_EQUAL(m_expected_tip, block->GetHash());