4 files changed, 21 insertions, 7 deletions
diff --git a/src/test/miner_tests.cpp b/src/test/miner_tests.cpp
index 73deab2805..4321d7d16e 100644
--- a/src/test/miner_tests.cpp
+++ b/src/test/miner_tests.cpp
@@ -8,15 +8,15 @@
 #include <consensus/merkle.h>
 #include <consensus/tx_verify.h>
 #include <consensus/validation.h>
-#include <validation.h>
 #include <miner.h>
 #include <policy/policy.h>
 #include <pubkey.h>
 #include <script/standard.h>
 #include <txmempool.h>
 #include <uint256.h>
-#include <util/system.h>
 #include <util/strencodings.h>
+#include <util/system.h>
+#include <validation.h>
 
 #include <test/setup_common.h>
 
@@ -82,7 +82,7 @@ struct {
     {2, 0xbbbeb305}, {2, 0xfe1c810a},
 };
 
-static CBlockIndex CreateBlockIndex(int nHeight)
+static CBlockIndex CreateBlockIndex(int nHeight) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
 {
     CBlockIndex index;
     index.nHeight = nHeight;
diff --git a/src/test/txvalidationcache_tests.cpp b/src/test/txvalidationcache_tests.cpp
index 6b0775a73a..fe30d5f3a7 100644
--- a/src/test/txvalidationcache_tests.cpp
+++ b/src/test/txvalidationcache_tests.cpp
@@ -66,18 +66,27 @@ BOOST_FIXTURE_TEST_CASE(tx_mempool_block_doublespend, TestChain100Setup)
 
     // Test 1: block with both of those transactions should be rejected.
     block = CreateAndProcessBlock(spends, scriptPubKey);
-    BOOST_CHECK(::ChainActive().Tip()->GetBlockHash() != block.GetHash());
+    {
+        LOCK(cs_main);
+        BOOST_CHECK(::ChainActive().Tip()->GetBlockHash() != block.GetHash());
+    }
 
     // Test 2: ... and should be rejected if spend1 is in the memory pool
     BOOST_CHECK(ToMemPool(spends[0]));
     block = CreateAndProcessBlock(spends, scriptPubKey);
-    BOOST_CHECK(::ChainActive().Tip()->GetBlockHash() != block.GetHash());
+    {
+        LOCK(cs_main);
+        BOOST_CHECK(::ChainActive().Tip()->GetBlockHash() != block.GetHash());
+    }
     mempool.clear();
 
     // Test 3: ... and should be rejected if spend2 is in the memory pool
     BOOST_CHECK(ToMemPool(spends[1]));
     block = CreateAndProcessBlock(spends, scriptPubKey);
-    BOOST_CHECK(::ChainActive().Tip()->GetBlockHash() != block.GetHash());
+    {
+        LOCK(cs_main);
+        BOOST_CHECK(::ChainActive().Tip()->GetBlockHash() != block.GetHash());
+    }
     mempool.clear();
 
     // Final sanity test: first spend in mempool, second in block, that's OK:
@@ -85,7 +94,10 @@ BOOST_FIXTURE_TEST_CASE(tx_mempool_block_doublespend, TestChain100Setup)
     oneSpend.push_back(spends[0]);
     BOOST_CHECK(ToMemPool(spends[1]));
     block = CreateAndProcessBlock(oneSpend, scriptPubKey);
-    BOOST_CHECK(::ChainActive().Tip()->GetBlockHash() == block.GetHash());
+    {
+        LOCK(cs_main);
+        BOOST_CHECK(::ChainActive().Tip()->GetBlockHash() == block.GetHash());
+    }
     // spends[1] should have been removed from the mempool when the
     // block with spends[0] is accepted:
     BOOST_CHECK_EQUAL(mempool.size(), 0U);
diff --git a/src/test/util.cpp b/src/test/util.cpp
index 2afa88bd2c..64ecc6623a 100644
--- a/src/test/util.cpp
+++ b/src/test/util.cpp
@@ -84,6 +84,7 @@ std::shared_ptr<CBlock> PrepareBlock(const CScript& coinbase_scriptPubKey)
             .CreateNewBlock(coinbase_scriptPubKey)
             ->block);
 
+    LOCK(cs_main);
     block->nTime = ::ChainActive().Tip()->GetMedianTimePast() + 1;
     block->hashMerkleRoot = BlockMerkleRoot(*block);
 
diff --git a/src/test/validation_block_tests.cpp b/src/test/validation_block_tests.cpp
index 7c8d4ea49d..5dee034b20 100644
--- a/src/test/validation_block_tests.cpp
+++ b/src/test/validation_block_tests.cpp
@@ -181,6 +181,7 @@ BOOST_AUTO_TEST_CASE(processnewblock_signals_ordering)
 
     UnregisterValidationInterface(&sub);
 
+    LOCK(cs_main);
     BOOST_CHECK_EQUAL(sub.m_expected_tip, ::ChainActive().Tip()->GetBlockHash());
 }