diff --git a/src/bitcoin-tx.cpp b/src/bitcoin-tx.cpp
index f095551c48e..e9dac9ffb95 100644
--- a/src/bitcoin-tx.cpp
+++ b/src/bitcoin-tx.cpp
@@ -191,7 +191,7 @@ static void MutateTxAddInput(CMutableTransaction& tx, const string& strInput)
     string strTxid = strInput.substr(0, pos);
     if ((strTxid.size() != 64) || !IsHex(strTxid))
         throw runtime_error("invalid TX input txid");
-    uint256 txid(strTxid);
+    uint256 txid(uint256S(strTxid));
 
     static const unsigned int minTxOutSz = 9;
     static const unsigned int maxVout = MAX_BLOCK_SIZE / minTxOutSz;
diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index 7e76a0bfa2d..844640061e8 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -54,19 +54,19 @@ static void convertSeed6(std::vector<CAddress> &vSeedsOut, const SeedSpec6 *data
  */
 static Checkpoints::MapCheckpoints mapCheckpoints =
         boost::assign::map_list_of
-        ( 11111, uint256("0x0000000069e244f73d78e8fd29ba2fd2ed618bd6fa2ee92559f542fdb26e7c1d"))
-        ( 33333, uint256("0x000000002dd5588a74784eaa7ab0507a18ad16a236e7b1ce69f00d7ddfb5d0a6"))
-        ( 74000, uint256("0x0000000000573993a3c9e41ce34471c079dcf5f52a0e824a81e7f953b8661a20"))
-        (105000, uint256("0x00000000000291ce28027faea320c8d2b054b2e0fe44a773f3eefb151d6bdc97"))
-        (134444, uint256("0x00000000000005b12ffd4cd315cd34ffd4a594f430ac814c91184a0d42d2b0fe"))
-        (168000, uint256("0x000000000000099e61ea72015e79632f216fe6cb33d7899acb35b75c8303b763"))
-        (193000, uint256("0x000000000000059f452a5f7340de6682a977387c17010ff6e6c3bd83ca8b1317"))
-        (210000, uint256("0x000000000000048b95347e83192f69cf0366076336c639f9b7228e9ba171342e"))
-        (216116, uint256("0x00000000000001b4f4b433e81ee46494af945cf96014816a4e2370f11b23df4e"))
-        (225430, uint256("0x00000000000001c108384350f74090433e7fcf79a606b8e797f065b130575932"))
-        (250000, uint256("0x000000000000003887df1f29024b06fc2200b55f8af8f35453d7be294df2d214"))
-        (279000, uint256("0x0000000000000001ae8c72a0b0c301f67e3afca10e819efa9041e458e9bd7e40"))
-        (295000, uint256("0x00000000000000004d9b4ef50f0f9d686fd69db2e03af35a100370c64632a983"))
+        ( 11111, uint256S("0x0000000069e244f73d78e8fd29ba2fd2ed618bd6fa2ee92559f542fdb26e7c1d"))
+        ( 33333, uint256S("0x000000002dd5588a74784eaa7ab0507a18ad16a236e7b1ce69f00d7ddfb5d0a6"))
+        ( 74000, uint256S("0x0000000000573993a3c9e41ce34471c079dcf5f52a0e824a81e7f953b8661a20"))
+        (105000, uint256S("0x00000000000291ce28027faea320c8d2b054b2e0fe44a773f3eefb151d6bdc97"))
+        (134444, uint256S("0x00000000000005b12ffd4cd315cd34ffd4a594f430ac814c91184a0d42d2b0fe"))
+        (168000, uint256S("0x000000000000099e61ea72015e79632f216fe6cb33d7899acb35b75c8303b763"))
+        (193000, uint256S("0x000000000000059f452a5f7340de6682a977387c17010ff6e6c3bd83ca8b1317"))
+        (210000, uint256S("0x000000000000048b95347e83192f69cf0366076336c639f9b7228e9ba171342e"))
+        (216116, uint256S("0x00000000000001b4f4b433e81ee46494af945cf96014816a4e2370f11b23df4e"))
+        (225430, uint256S("0x00000000000001c108384350f74090433e7fcf79a606b8e797f065b130575932"))
+        (250000, uint256S("0x000000000000003887df1f29024b06fc2200b55f8af8f35453d7be294df2d214"))
+        (279000, uint256S("0x0000000000000001ae8c72a0b0c301f67e3afca10e819efa9041e458e9bd7e40"))
+        (295000, uint256S("0x00000000000000004d9b4ef50f0f9d686fd69db2e03af35a100370c64632a983"))
         ;
 static const Checkpoints::CCheckpointData data = {
         &mapCheckpoints,
@@ -78,7 +78,7 @@ static const Checkpoints::CCheckpointData data = {
 
 static Checkpoints::MapCheckpoints mapCheckpointsTestnet =
         boost::assign::map_list_of
-        ( 546, uint256("000000002a936ca763904c3c35fce2f3556c559c0214345d31b1bcebf76acb70"))
+        ( 546, uint256S("000000002a936ca763904c3c35fce2f3556c559c0214345d31b1bcebf76acb70"))
         ;
 static const Checkpoints::CCheckpointData dataTestnet = {
         &mapCheckpointsTestnet,
@@ -89,7 +89,7 @@ static const Checkpoints::CCheckpointData dataTestnet = {
 
 static Checkpoints::MapCheckpoints mapCheckpointsRegtest =
         boost::assign::map_list_of
-        ( 0, uint256("0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206"))
+        ( 0, uint256S("0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206"))
         ;
 static const Checkpoints::CCheckpointData dataRegtest = {
         &mapCheckpointsRegtest,
@@ -149,8 +149,8 @@ public:
         genesis.nNonce   = 2083236893;
 
         hashGenesisBlock = genesis.GetHash();
-        assert(hashGenesisBlock == uint256("0x000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f"));
-        assert(genesis.hashMerkleRoot == uint256("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));
+        assert(hashGenesisBlock == uint256S("0x000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f"));
+        assert(genesis.hashMerkleRoot == uint256S("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));
 
         vSeeds.push_back(CDNSSeedData("bitcoin.sipa.be", "seed.bitcoin.sipa.be"));
         vSeeds.push_back(CDNSSeedData("bluematt.me", "dnsseed.bluematt.me"));
@@ -208,7 +208,7 @@ public:
         genesis.nTime = 1296688602;
         genesis.nNonce = 414098458;
         hashGenesisBlock = genesis.GetHash();
-        assert(hashGenesisBlock == uint256("0x000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943"));
+        assert(hashGenesisBlock == uint256S("0x000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943"));
 
         vFixedSeeds.clear();
         vSeeds.clear();
@@ -265,7 +265,7 @@ public:
         genesis.nNonce = 2;
         hashGenesisBlock = genesis.GetHash();
         nDefaultPort = 18444;
-        assert(hashGenesisBlock == uint256("0x0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206"));
+        assert(hashGenesisBlock == uint256S("0x0f9188f13cb7b2c71f2a335e3a4fc328bf5beb436012afca590b1a11466e2206"));
 
         vFixedSeeds.clear(); //! Regtest mode doesn't have any fixed seeds.
         vSeeds.clear();  //! Regtest mode doesn't have any DNS seeds.
diff --git a/src/main.cpp b/src/main.cpp
index c392138ff38..77d2dcb2048 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1738,8 +1738,8 @@ bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pin
     // two in the chain that violate it. This prevents exploiting the issue against nodes in their
     // initial block download.
     bool fEnforceBIP30 = (!pindex->phashBlock) || // Enforce on CreateNewBlock invocations which don't have a hash.
-                          !((pindex->nHeight==91842 && pindex->GetBlockHash() == uint256("0x00000000000a4d0a398161ffc163c503763b1f4360639393e0e4c8e300e0caec")) ||
-                           (pindex->nHeight==91880 && pindex->GetBlockHash() == uint256("0x00000000000743f190a18c5577a3c2d2a1f610ae9601ac046a38084ccb7cd721")));
+                          !((pindex->nHeight==91842 && pindex->GetBlockHash() == uint256S("0x00000000000a4d0a398161ffc163c503763b1f4360639393e0e4c8e300e0caec")) ||
+                           (pindex->nHeight==91880 && pindex->GetBlockHash() == uint256S("0x00000000000743f190a18c5577a3c2d2a1f610ae9601ac046a38084ccb7cd721")));
     if (fEnforceBIP30) {
         BOOST_FOREACH(const CTransaction& tx, block.vtx) {
             const CCoins* coins = view.AccessCoins(tx.GetHash());
diff --git a/src/qt/coincontroldialog.cpp b/src/qt/coincontroldialog.cpp
index 60e7d62a7a7..8422f316f98 100644
--- a/src/qt/coincontroldialog.cpp
+++ b/src/qt/coincontroldialog.cpp
@@ -213,7 +213,7 @@ void CoinControlDialog::showMenu(const QPoint &point)
         if (item->text(COLUMN_TXHASH).length() == 64) // transaction hash is 64 characters (this means its a child node, so its not a parent node in tree mode)
         {
             copyTransactionHashAction->setEnabled(true);
-            if (model->isLockedCoin(uint256(item->text(COLUMN_TXHASH).toStdString()), item->text(COLUMN_VOUT_INDEX).toUInt()))
+            if (model->isLockedCoin(uint256S(item->text(COLUMN_TXHASH).toStdString()), item->text(COLUMN_VOUT_INDEX).toUInt()))
             {
                 lockAction->setEnabled(false);
                 unlockAction->setEnabled(true);
@@ -272,7 +272,7 @@ void CoinControlDialog::lockCoin()
     if (contextMenuItem->checkState(COLUMN_CHECKBOX) == Qt::Checked)
         contextMenuItem->setCheckState(COLUMN_CHECKBOX, Qt::Unchecked);
 
-    COutPoint outpt(uint256(contextMenuItem->text(COLUMN_TXHASH).toStdString()), contextMenuItem->text(COLUMN_VOUT_INDEX).toUInt());
+    COutPoint outpt(uint256S(contextMenuItem->text(COLUMN_TXHASH).toStdString()), contextMenuItem->text(COLUMN_VOUT_INDEX).toUInt());
     model->lockCoin(outpt);
     contextMenuItem->setDisabled(true);
     contextMenuItem->setIcon(COLUMN_CHECKBOX, SingleColorIcon(":/icons/lock_closed"));
@@ -282,7 +282,7 @@ void CoinControlDialog::lockCoin()
 // context menu action: unlock coin
 void CoinControlDialog::unlockCoin()
 {
-    COutPoint outpt(uint256(contextMenuItem->text(COLUMN_TXHASH).toStdString()), contextMenuItem->text(COLUMN_VOUT_INDEX).toUInt());
+    COutPoint outpt(uint256S(contextMenuItem->text(COLUMN_TXHASH).toStdString()), contextMenuItem->text(COLUMN_VOUT_INDEX).toUInt());
     model->unlockCoin(outpt);
     contextMenuItem->setDisabled(false);
     contextMenuItem->setIcon(COLUMN_CHECKBOX, QIcon());
@@ -388,7 +388,7 @@ void CoinControlDialog::viewItemChanged(QTreeWidgetItem* item, int column)
 {
     if (column == COLUMN_CHECKBOX && item->text(COLUMN_TXHASH).length() == 64) // transaction hash is 64 characters (this means its a child node, so its not a parent node in tree mode)
     {
-        COutPoint outpt(uint256(item->text(COLUMN_TXHASH).toStdString()), item->text(COLUMN_VOUT_INDEX).toUInt());
+        COutPoint outpt(uint256S(item->text(COLUMN_TXHASH).toStdString()), item->text(COLUMN_VOUT_INDEX).toUInt());
 
         if (item->checkState(COLUMN_CHECKBOX) == Qt::Unchecked)
             coinControl->UnSelect(outpt);
diff --git a/src/rpcblockchain.cpp b/src/rpcblockchain.cpp
index 4705c07b8c0..cfc559d1986 100644
--- a/src/rpcblockchain.cpp
+++ b/src/rpcblockchain.cpp
@@ -278,7 +278,7 @@ Value getblock(const Array& params, bool fHelp)
         );
 
     std::string strHash = params[0].get_str();
-    uint256 hash(strHash);
+    uint256 hash(uint256S(strHash));
 
     bool fVerbose = true;
     if (params.size() > 1)
@@ -383,7 +383,7 @@ Value gettxout(const Array& params, bool fHelp)
     Object ret;
 
     std::string strHash = params[0].get_str();
-    uint256 hash(strHash);
+    uint256 hash(uint256S(strHash));
     int n = params[1].get_int();
     bool fMempool = true;
     if (params.size() > 2)
@@ -619,7 +619,7 @@ Value invalidateblock(const Array& params, bool fHelp)
         );
 
     std::string strHash = params[0].get_str();
-    uint256 hash(strHash);
+    uint256 hash(uint256S(strHash));
     CValidationState state;
 
     {
@@ -658,7 +658,7 @@ Value reconsiderblock(const Array& params, bool fHelp)
         );
 
     std::string strHash = params[0].get_str();
-    uint256 hash(strHash);
+    uint256 hash(uint256S(strHash));
     CValidationState state;
 
     {
diff --git a/src/rpcwallet.cpp b/src/rpcwallet.cpp
index 21f6bcae3d7..470a48e4fb4 100644
--- a/src/rpcwallet.cpp
+++ b/src/rpcwallet.cpp
@@ -1902,7 +1902,7 @@ Value lockunspent(const Array& params, bool fHelp)
         if (nOutput < 0)
             throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, vout must be positive");
 
-        COutPoint outpt(uint256(txid), nOutput);
+        COutPoint outpt(uint256S(txid), nOutput);
 
         if (fUnlock)
             pwalletMain->UnlockCoin(outpt);
diff --git a/src/script/interpreter.cpp b/src/script/interpreter.cpp
index 7f8b371d605..e979f61f6e7 100644
--- a/src/script/interpreter.cpp
+++ b/src/script/interpreter.cpp
@@ -1030,7 +1030,7 @@ public:
 
 uint256 SignatureHash(const CScript& scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType)
 {
-    static const uint256 one("0000000000000000000000000000000000000000000000000000000000000001");
+    static const uint256 one(uint256S("0000000000000000000000000000000000000000000000000000000000000001"));
     if (nIn >= txTo.vin.size()) {
         //  nIn out of range
         return one;
diff --git a/src/test/Checkpoints_tests.cpp b/src/test/Checkpoints_tests.cpp
index 4ea6a91d543..a9b6cd44a87 100644
--- a/src/test/Checkpoints_tests.cpp
+++ b/src/test/Checkpoints_tests.cpp
@@ -18,8 +18,8 @@ BOOST_AUTO_TEST_SUITE(Checkpoints_tests)
 
 BOOST_AUTO_TEST_CASE(sanity)
 {
-    uint256 p11111 = uint256("0x0000000069e244f73d78e8fd29ba2fd2ed618bd6fa2ee92559f542fdb26e7c1d");
-    uint256 p134444 = uint256("0x00000000000005b12ffd4cd315cd34ffd4a594f430ac814c91184a0d42d2b0fe");
+    uint256 p11111 = uint256S("0x0000000069e244f73d78e8fd29ba2fd2ed618bd6fa2ee92559f542fdb26e7c1d");
+    uint256 p134444 = uint256S("0x00000000000005b12ffd4cd315cd34ffd4a594f430ac814c91184a0d42d2b0fe");
     BOOST_CHECK(Checkpoints::CheckBlock(11111, p11111));
     BOOST_CHECK(Checkpoints::CheckBlock(134444, p134444));
 
diff --git a/src/test/bloom_tests.cpp b/src/test/bloom_tests.cpp
index c32098efa09..f9cbcb0d9e5 100644
--- a/src/test/bloom_tests.cpp
+++ b/src/test/bloom_tests.cpp
@@ -125,7 +125,7 @@ BOOST_AUTO_TEST_CASE(bloom_match)
     spendStream >> spendingTx;
 
     CBloomFilter filter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
-    filter.insert(uint256("0xb4749f017444b051c44dfd2720e88f314ff94f3dd6d56d40ef65854fcd7fff6b"));
+    filter.insert(uint256S("0xb4749f017444b051c44dfd2720e88f314ff94f3dd6d56d40ef65854fcd7fff6b"));
     BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(tx), "Simple Bloom filter didn't match tx hash");
 
     filter = CBloomFilter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
@@ -151,11 +151,11 @@ BOOST_AUTO_TEST_CASE(bloom_match)
     BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(tx), "Simple Bloom filter didn't match output address");
 
     filter = CBloomFilter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
-    filter.insert(COutPoint(uint256("0x90c122d70786e899529d71dbeba91ba216982fb6ba58f3bdaab65e73b7e9260b"), 0));
+    filter.insert(COutPoint(uint256S("0x90c122d70786e899529d71dbeba91ba216982fb6ba58f3bdaab65e73b7e9260b"), 0));
     BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(tx), "Simple Bloom filter didn't match COutPoint");
 
     filter = CBloomFilter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
-    COutPoint prevOutPoint(uint256("0x90c122d70786e899529d71dbeba91ba216982fb6ba58f3bdaab65e73b7e9260b"), 0);
+    COutPoint prevOutPoint(uint256S("0x90c122d70786e899529d71dbeba91ba216982fb6ba58f3bdaab65e73b7e9260b"), 0);
     {
         vector<unsigned char> data(32 + sizeof(unsigned int));
         memcpy(&data[0], prevOutPoint.hash.begin(), 32);
@@ -165,7 +165,7 @@ BOOST_AUTO_TEST_CASE(bloom_match)
     BOOST_CHECK_MESSAGE(filter.IsRelevantAndUpdate(tx), "Simple Bloom filter didn't match manually serialized COutPoint");
 
     filter = CBloomFilter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
-    filter.insert(uint256("00000009e784f32f62ef849763d4f45b98e07ba658647343b915ff832b110436"));
+    filter.insert(uint256S("00000009e784f32f62ef849763d4f45b98e07ba658647343b915ff832b110436"));
     BOOST_CHECK_MESSAGE(!filter.IsRelevantAndUpdate(tx), "Simple Bloom filter matched random tx hash");
 
     filter = CBloomFilter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
@@ -173,11 +173,11 @@ BOOST_AUTO_TEST_CASE(bloom_match)
     BOOST_CHECK_MESSAGE(!filter.IsRelevantAndUpdate(tx), "Simple Bloom filter matched random address");
 
     filter = CBloomFilter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
-    filter.insert(COutPoint(uint256("0x90c122d70786e899529d71dbeba91ba216982fb6ba58f3bdaab65e73b7e9260b"), 1));
+    filter.insert(COutPoint(uint256S("0x90c122d70786e899529d71dbeba91ba216982fb6ba58f3bdaab65e73b7e9260b"), 1));
     BOOST_CHECK_MESSAGE(!filter.IsRelevantAndUpdate(tx), "Simple Bloom filter matched COutPoint for an output we didn't care about");
 
     filter = CBloomFilter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
-    filter.insert(COutPoint(uint256("0x000000d70786e899529d71dbeba91ba216982fb6ba58f3bdaab65e73b7e9260b"), 0));
+    filter.insert(COutPoint(uint256S("0x000000d70786e899529d71dbeba91ba216982fb6ba58f3bdaab65e73b7e9260b"), 0));
     BOOST_CHECK_MESSAGE(!filter.IsRelevantAndUpdate(tx), "Simple Bloom filter matched COutPoint for an output we didn't care about");
 }
 
@@ -191,7 +191,7 @@ BOOST_AUTO_TEST_CASE(merkle_block_1)
 
     CBloomFilter filter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
     // Match the last transaction
-    filter.insert(uint256("0x74d681e0e03bafa802c8aa084379aa98d9fcd632ddc2ed9782b586ec87451f20"));
+    filter.insert(uint256S("0x74d681e0e03bafa802c8aa084379aa98d9fcd632ddc2ed9782b586ec87451f20"));
 
     CMerkleBlock merkleBlock(block, filter);
     BOOST_CHECK(merkleBlock.header.GetHash() == block.GetHash());
@@ -199,7 +199,7 @@ BOOST_AUTO_TEST_CASE(merkle_block_1)
     BOOST_CHECK(merkleBlock.vMatchedTxn.size() == 1);
     pair<unsigned int, uint256> pair = merkleBlock.vMatchedTxn[0];
 
-    BOOST_CHECK(merkleBlock.vMatchedTxn[0].second == uint256("0x74d681e0e03bafa802c8aa084379aa98d9fcd632ddc2ed9782b586ec87451f20"));
+    BOOST_CHECK(merkleBlock.vMatchedTxn[0].second == uint256S("0x74d681e0e03bafa802c8aa084379aa98d9fcd632ddc2ed9782b586ec87451f20"));
     BOOST_CHECK(merkleBlock.vMatchedTxn[0].first == 8);
 
     vector<uint256> vMatched;
@@ -209,7 +209,7 @@ BOOST_AUTO_TEST_CASE(merkle_block_1)
         BOOST_CHECK(vMatched[i] == merkleBlock.vMatchedTxn[i].second);
 
     // Also match the 8th transaction
-    filter.insert(uint256("0xdd1fd2a6fc16404faf339881a90adbde7f4f728691ac62e8f168809cdfae1053"));
+    filter.insert(uint256S("0xdd1fd2a6fc16404faf339881a90adbde7f4f728691ac62e8f168809cdfae1053"));
     merkleBlock = CMerkleBlock(block, filter);
     BOOST_CHECK(merkleBlock.header.GetHash() == block.GetHash());
 
@@ -217,7 +217,7 @@ BOOST_AUTO_TEST_CASE(merkle_block_1)
 
     BOOST_CHECK(merkleBlock.vMatchedTxn[1] == pair);
 
-    BOOST_CHECK(merkleBlock.vMatchedTxn[0].second == uint256("0xdd1fd2a6fc16404faf339881a90adbde7f4f728691ac62e8f168809cdfae1053"));
+    BOOST_CHECK(merkleBlock.vMatchedTxn[0].second == uint256S("0xdd1fd2a6fc16404faf339881a90adbde7f4f728691ac62e8f168809cdfae1053"));
     BOOST_CHECK(merkleBlock.vMatchedTxn[0].first == 7);
 
     BOOST_CHECK(merkleBlock.txn.ExtractMatches(vMatched) == block.hashMerkleRoot);
@@ -236,7 +236,7 @@ BOOST_AUTO_TEST_CASE(merkle_block_2)
 
     CBloomFilter filter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
     // Match the first transaction
-    filter.insert(uint256("0xe980fe9f792d014e73b95203dc1335c5f9ce19ac537a419e6df5b47aecb93b70"));
+    filter.insert(uint256S("0xe980fe9f792d014e73b95203dc1335c5f9ce19ac537a419e6df5b47aecb93b70"));
 
     CMerkleBlock merkleBlock(block, filter);
     BOOST_CHECK(merkleBlock.header.GetHash() == block.GetHash());
@@ -244,7 +244,7 @@ BOOST_AUTO_TEST_CASE(merkle_block_2)
     BOOST_CHECK(merkleBlock.vMatchedTxn.size() == 1);
     pair<unsigned int, uint256> pair = merkleBlock.vMatchedTxn[0];
 
-    BOOST_CHECK(merkleBlock.vMatchedTxn[0].second == uint256("0xe980fe9f792d014e73b95203dc1335c5f9ce19ac537a419e6df5b47aecb93b70"));
+    BOOST_CHECK(merkleBlock.vMatchedTxn[0].second == uint256S("0xe980fe9f792d014e73b95203dc1335c5f9ce19ac537a419e6df5b47aecb93b70"));
     BOOST_CHECK(merkleBlock.vMatchedTxn[0].first == 0);
 
     vector<uint256> vMatched;
@@ -265,13 +265,13 @@ BOOST_AUTO_TEST_CASE(merkle_block_2)
 
     BOOST_CHECK(pair == merkleBlock.vMatchedTxn[0]);
 
-    BOOST_CHECK(merkleBlock.vMatchedTxn[1].second == uint256("0x28204cad1d7fc1d199e8ef4fa22f182de6258a3eaafe1bbe56ebdcacd3069a5f"));
+    BOOST_CHECK(merkleBlock.vMatchedTxn[1].second == uint256S("0x28204cad1d7fc1d199e8ef4fa22f182de6258a3eaafe1bbe56ebdcacd3069a5f"));
     BOOST_CHECK(merkleBlock.vMatchedTxn[1].first == 1);
 
-    BOOST_CHECK(merkleBlock.vMatchedTxn[2].second == uint256("0x6b0f8a73a56c04b519f1883e8aafda643ba61a30bd1439969df21bea5f4e27e2"));
+    BOOST_CHECK(merkleBlock.vMatchedTxn[2].second == uint256S("0x6b0f8a73a56c04b519f1883e8aafda643ba61a30bd1439969df21bea5f4e27e2"));
     BOOST_CHECK(merkleBlock.vMatchedTxn[2].first == 2);
 
-    BOOST_CHECK(merkleBlock.vMatchedTxn[3].second == uint256("0x3c1d7e82342158e4109df2e0b6348b6e84e403d8b4046d7007663ace63cddb23"));
+    BOOST_CHECK(merkleBlock.vMatchedTxn[3].second == uint256S("0x3c1d7e82342158e4109df2e0b6348b6e84e403d8b4046d7007663ace63cddb23"));
     BOOST_CHECK(merkleBlock.vMatchedTxn[3].first == 3);
 
     BOOST_CHECK(merkleBlock.txn.ExtractMatches(vMatched) == block.hashMerkleRoot);
@@ -290,7 +290,7 @@ BOOST_AUTO_TEST_CASE(merkle_block_2_with_update_none)
 
     CBloomFilter filter(10, 0.000001, 0, BLOOM_UPDATE_NONE);
     // Match the first transaction
-    filter.insert(uint256("0xe980fe9f792d014e73b95203dc1335c5f9ce19ac537a419e6df5b47aecb93b70"));
+    filter.insert(uint256S("0xe980fe9f792d014e73b95203dc1335c5f9ce19ac537a419e6df5b47aecb93b70"));
 
     CMerkleBlock merkleBlock(block, filter);
     BOOST_CHECK(merkleBlock.header.GetHash() == block.GetHash());
@@ -298,7 +298,7 @@ BOOST_AUTO_TEST_CASE(merkle_block_2_with_update_none)
     BOOST_CHECK(merkleBlock.vMatchedTxn.size() == 1);
     pair<unsigned int, uint256> pair = merkleBlock.vMatchedTxn[0];
 
-    BOOST_CHECK(merkleBlock.vMatchedTxn[0].second == uint256("0xe980fe9f792d014e73b95203dc1335c5f9ce19ac537a419e6df5b47aecb93b70"));
+    BOOST_CHECK(merkleBlock.vMatchedTxn[0].second == uint256S("0xe980fe9f792d014e73b95203dc1335c5f9ce19ac537a419e6df5b47aecb93b70"));
     BOOST_CHECK(merkleBlock.vMatchedTxn[0].first == 0);
 
     vector<uint256> vMatched;
@@ -319,10 +319,10 @@ BOOST_AUTO_TEST_CASE(merkle_block_2_with_update_none)
 
     BOOST_CHECK(pair == merkleBlock.vMatchedTxn[0]);
 
-    BOOST_CHECK(merkleBlock.vMatchedTxn[1].second == uint256("0x28204cad1d7fc1d199e8ef4fa22f182de6258a3eaafe1bbe56ebdcacd3069a5f"));
+    BOOST_CHECK(merkleBlock.vMatchedTxn[1].second == uint256S("0x28204cad1d7fc1d199e8ef4fa22f182de6258a3eaafe1bbe56ebdcacd3069a5f"));
     BOOST_CHECK(merkleBlock.vMatchedTxn[1].first == 1);
 
-    BOOST_CHECK(merkleBlock.vMatchedTxn[2].second == uint256("0x3c1d7e82342158e4109df2e0b6348b6e84e403d8b4046d7007663ace63cddb23"));
+    BOOST_CHECK(merkleBlock.vMatchedTxn[2].second == uint256S("0x3c1d7e82342158e4109df2e0b6348b6e84e403d8b4046d7007663ace63cddb23"));
     BOOST_CHECK(merkleBlock.vMatchedTxn[2].first == 3);
 
     BOOST_CHECK(merkleBlock.txn.ExtractMatches(vMatched) == block.hashMerkleRoot);
@@ -341,14 +341,14 @@ BOOST_AUTO_TEST_CASE(merkle_block_3_and_serialize)
 
     CBloomFilter filter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
     // Match the only transaction
-    filter.insert(uint256("0x63194f18be0af63f2c6bc9dc0f777cbefed3d9415c4af83f3ee3a3d669c00cb5"));
+    filter.insert(uint256S("0x63194f18be0af63f2c6bc9dc0f777cbefed3d9415c4af83f3ee3a3d669c00cb5"));
 
     CMerkleBlock merkleBlock(block, filter);
     BOOST_CHECK(merkleBlock.header.GetHash() == block.GetHash());
 
     BOOST_CHECK(merkleBlock.vMatchedTxn.size() == 1);
 
-    BOOST_CHECK(merkleBlock.vMatchedTxn[0].second == uint256("0x63194f18be0af63f2c6bc9dc0f777cbefed3d9415c4af83f3ee3a3d669c00cb5"));
+    BOOST_CHECK(merkleBlock.vMatchedTxn[0].second == uint256S("0x63194f18be0af63f2c6bc9dc0f777cbefed3d9415c4af83f3ee3a3d669c00cb5"));
     BOOST_CHECK(merkleBlock.vMatchedTxn[0].first == 0);
 
     vector<uint256> vMatched;
@@ -379,7 +379,7 @@ BOOST_AUTO_TEST_CASE(merkle_block_4)
 
     CBloomFilter filter(10, 0.000001, 0, BLOOM_UPDATE_ALL);
     // Match the last transaction
-    filter.insert(uint256("0x0a2a92f0bda4727d0a13eaddf4dd9ac6b5c61a1429e6b2b818f19b15df0ac154"));
+    filter.insert(uint256S("0x0a2a92f0bda4727d0a13eaddf4dd9ac6b5c61a1429e6b2b818f19b15df0ac154"));
 
     CMerkleBlock merkleBlock(block, filter);
     BOOST_CHECK(merkleBlock.header.GetHash() == block.GetHash());
@@ -387,7 +387,7 @@ BOOST_AUTO_TEST_CASE(merkle_block_4)
     BOOST_CHECK(merkleBlock.vMatchedTxn.size() == 1);
     pair<unsigned int, uint256> pair = merkleBlock.vMatchedTxn[0];
 
-    BOOST_CHECK(merkleBlock.vMatchedTxn[0].second == uint256("0x0a2a92f0bda4727d0a13eaddf4dd9ac6b5c61a1429e6b2b818f19b15df0ac154"));
+    BOOST_CHECK(merkleBlock.vMatchedTxn[0].second == uint256S("0x0a2a92f0bda4727d0a13eaddf4dd9ac6b5c61a1429e6b2b818f19b15df0ac154"));
     BOOST_CHECK(merkleBlock.vMatchedTxn[0].first == 6);
 
     vector<uint256> vMatched;
@@ -397,13 +397,13 @@ BOOST_AUTO_TEST_CASE(merkle_block_4)
         BOOST_CHECK(vMatched[i] == merkleBlock.vMatchedTxn[i].second);
 
     // Also match the 4th transaction
-    filter.insert(uint256("0x02981fa052f0481dbc5868f4fc2166035a10f27a03cfd2de67326471df5bc041"));
+    filter.insert(uint256S("0x02981fa052f0481dbc5868f4fc2166035a10f27a03cfd2de67326471df5bc041"));
     merkleBlock = CMerkleBlock(block, filter);
     BOOST_CHECK(merkleBlock.header.GetHash() == block.GetHash());
 
     BOOST_CHECK(merkleBlock.vMatchedTxn.size() == 2);
 
-    BOOST_CHECK(merkleBlock.vMatchedTxn[0].second == uint256("0x02981fa052f0481dbc5868f4fc2166035a10f27a03cfd2de67326471df5bc041"));
+    BOOST_CHECK(merkleBlock.vMatchedTxn[0].second == uint256S("0x02981fa052f0481dbc5868f4fc2166035a10f27a03cfd2de67326471df5bc041"));
     BOOST_CHECK(merkleBlock.vMatchedTxn[0].first == 3);
 
     BOOST_CHECK(merkleBlock.vMatchedTxn[1] == pair);
@@ -432,9 +432,9 @@ BOOST_AUTO_TEST_CASE(merkle_block_4_test_p2pubkey_only)
     BOOST_CHECK(merkleBlock.header.GetHash() == block.GetHash());
 
     // We should match the generation outpoint
-    BOOST_CHECK(filter.contains(COutPoint(uint256("0x147caa76786596590baa4e98f5d9f48b86c7765e489f7a6ff3360fe5c674360b"), 0)));
+    BOOST_CHECK(filter.contains(COutPoint(uint256S("0x147caa76786596590baa4e98f5d9f48b86c7765e489f7a6ff3360fe5c674360b"), 0)));
     // ... but not the 4th transaction's output (its not pay-2-pubkey)
-    BOOST_CHECK(!filter.contains(COutPoint(uint256("0x02981fa052f0481dbc5868f4fc2166035a10f27a03cfd2de67326471df5bc041"), 0)));
+    BOOST_CHECK(!filter.contains(COutPoint(uint256S("0x02981fa052f0481dbc5868f4fc2166035a10f27a03cfd2de67326471df5bc041"), 0)));
 }
 
 BOOST_AUTO_TEST_CASE(merkle_block_4_test_update_none)
@@ -455,8 +455,8 @@ BOOST_AUTO_TEST_CASE(merkle_block_4_test_update_none)
     BOOST_CHECK(merkleBlock.header.GetHash() == block.GetHash());
 
     // We shouldn't match any outpoints (UPDATE_NONE)
-    BOOST_CHECK(!filter.contains(COutPoint(uint256("0x147caa76786596590baa4e98f5d9f48b86c7765e489f7a6ff3360fe5c674360b"), 0)));
-    BOOST_CHECK(!filter.contains(COutPoint(uint256("0x02981fa052f0481dbc5868f4fc2166035a10f27a03cfd2de67326471df5bc041"), 0)));
+    BOOST_CHECK(!filter.contains(COutPoint(uint256S("0x147caa76786596590baa4e98f5d9f48b86c7765e489f7a6ff3360fe5c674360b"), 0)));
+    BOOST_CHECK(!filter.contains(COutPoint(uint256S("0x02981fa052f0481dbc5868f4fc2166035a10f27a03cfd2de67326471df5bc041"), 0)));
 }
 
 BOOST_AUTO_TEST_SUITE_END()
diff --git a/src/test/sighash_tests.cpp b/src/test/sighash_tests.cpp
index 036f70ec0f6..662f765a0bd 100644
--- a/src/test/sighash_tests.cpp
+++ b/src/test/sighash_tests.cpp
@@ -24,7 +24,7 @@ extern Array read_json(const std::string& jsondata);
 // Old script.cpp SignatureHash function
 uint256 static SignatureHashOld(CScript scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType)
 {
-    static const uint256 one("0000000000000000000000000000000000000000000000000000000000000001");
+    static const uint256 one(uint256S("0000000000000000000000000000000000000000000000000000000000000001"));
     if (nIn >= txTo.vin.size())
     {
         printf("ERROR: SignatureHash() : nIn=%d out of range\n", nIn);
diff --git a/src/test/transaction_tests.cpp b/src/test/transaction_tests.cpp
index 2594f89ac3e..efa2af917e6 100644
--- a/src/test/transaction_tests.cpp
+++ b/src/test/transaction_tests.cpp
@@ -118,7 +118,7 @@ BOOST_AUTO_TEST_CASE(tx_valid)
                     break;
                 }
 
-                mapprevOutScriptPubKeys[COutPoint(uint256(vinput[0].get_str()), vinput[1].get_int())] = ParseScript(vinput[2].get_str());
+                mapprevOutScriptPubKeys[COutPoint(uint256S(vinput[0].get_str()), vinput[1].get_int())] = ParseScript(vinput[2].get_str());
             }
             if (!fValid)
             {
@@ -194,7 +194,7 @@ BOOST_AUTO_TEST_CASE(tx_invalid)
                     break;
                 }
 
-                mapprevOutScriptPubKeys[COutPoint(uint256(vinput[0].get_str()), vinput[1].get_int())] = ParseScript(vinput[2].get_str());
+                mapprevOutScriptPubKeys[COutPoint(uint256S(vinput[0].get_str()), vinput[1].get_int())] = ParseScript(vinput[2].get_str());
             }
             if (!fValid)
             {