diff --git a/src/bench/block_assemble.cpp b/src/bench/block_assemble.cpp
index 8133fd9d65..cd4543c012 100644
--- a/src/bench/block_assemble.cpp
+++ b/src/bench/block_assemble.cpp
@@ -73,10 +73,12 @@ static void AssembleBlock(benchmark::State& state)
     boost::thread_group thread_group;
     CScheduler scheduler;
     {
+        LOCK(cs_main);
         ::pblocktree.reset(new CBlockTreeDB(1 << 20, true));
         ::pcoinsdbview.reset(new CCoinsViewDB(1 << 23, true));
         ::pcoinsTip.reset(new CCoinsViewCache(pcoinsdbview.get()));
-
+    }
+    {
         const CChainParams& chainparams = Params();
         thread_group.create_thread(std::bind(&CScheduler::serviceQueue, &scheduler));
         GetMainSignals().RegisterBackgroundSignalScheduler(scheduler);
diff --git a/src/bench/duplicate_inputs.cpp b/src/bench/duplicate_inputs.cpp
index e0854e2c62..1f6840d813 100644
--- a/src/bench/duplicate_inputs.cpp
+++ b/src/bench/duplicate_inputs.cpp
@@ -37,10 +37,12 @@ static void DuplicateInputs(benchmark::State& state)
     CScheduler scheduler;
     const CChainParams& chainparams = Params();
     {
+        LOCK(cs_main);
         ::pblocktree.reset(new CBlockTreeDB(1 << 20, true));
         ::pcoinsdbview.reset(new CCoinsViewDB(1 << 23, true));
         ::pcoinsTip.reset(new CCoinsViewCache(pcoinsdbview.get()));
-
+    }
+    {
         thread_group.create_thread(std::bind(&CScheduler::serviceQueue, &scheduler));
         GetMainSignals().RegisterBackgroundSignalScheduler(scheduler);
         LoadGenesisBlock(chainparams);
diff --git a/src/test/txvalidationcache_tests.cpp b/src/test/txvalidationcache_tests.cpp
index c467f27836..4d04aae7e9 100644
--- a/src/test/txvalidationcache_tests.cpp
+++ b/src/test/txvalidationcache_tests.cpp
@@ -102,7 +102,7 @@ BOOST_FIXTURE_TEST_CASE(tx_mempool_block_doublespend, TestChain100Setup)
 // should fail.
 // Capture this interaction with the upgraded_nop argument: set it when evaluating
 // any script flag that is implemented as an upgraded NOP code.
-static void ValidateCheckInputsForAllFlags(const CTransaction &tx, uint32_t failing_flags, bool add_to_cache)
+static void ValidateCheckInputsForAllFlags(const CTransaction &tx, uint32_t failing_flags, bool add_to_cache) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
 {
     PrecomputedTransactionData txdata(tx);
     // If we add many more flags, this loop can get too expensive, but we can
@@ -219,11 +219,10 @@ BOOST_FIXTURE_TEST_CASE(checkinputs_test, TestChain100Setup)
     CBlock block;
 
     block = CreateAndProcessBlock({spend_tx}, p2pk_scriptPubKey);
+    LOCK(cs_main);
     BOOST_CHECK(chainActive.Tip()->GetBlockHash() == block.GetHash());
     BOOST_CHECK(pcoinsTip->GetBestBlock() == block.GetHash());
 
-    LOCK(cs_main);
-
     // Test P2SH: construct a transaction that is valid without P2SH, and
     // then test validity with P2SH.
     {