diff --git a/blockchain.cpp b/blockchain.cpp
index 92912938e..73d4eb255 100644
--- a/blockchain.cpp
+++ b/blockchain.cpp
@@ -52,8 +52,10 @@ void doBlockchainTests(json_spirit::mValue& _v, bool _fillin)
 
 		BOOST_REQUIRE(o.count("pre"));
 		ImportTest importer(o["pre"].get_obj());
-		State state(OverlayDB(), BaseState::Empty, biGenesisBlock.coinbaseAddress);
-		State stateTemp(OverlayDB(), BaseState::Empty, biGenesisBlock.coinbaseAddress);
+		TransientDirectory td_stateDB;
+		TransientDirectory td_stateDB_tmp;
+		State state(OverlayDB(State::openDB(td_stateDB.path())), BaseState::Empty, biGenesisBlock.coinbaseAddress);
+		State stateTemp(OverlayDB(State::openDB(td_stateDB_tmp.path())), BaseState::Empty, biGenesisBlock.coinbaseAddress);
 		importer.importState(o["pre"].get_obj(), state);
 		o["pre"] = fillJsonWithState(state);
 		state.commit();
@@ -626,11 +628,11 @@ void writeBlockHeaderToJson(mObject& _o, BlockInfo const& _bi)
 	_o["transactionsTrie"] = toString(_bi.transactionsRoot);
 	_o["receiptTrie"] = toString(_bi.receiptsRoot);
 	_o["bloom"] = toString(_bi.logBloom);
-	_o["difficulty"] = "0x" + toHex(toCompactBigEndian(_bi.difficulty), 1);
-	_o["number"] = "0x" + toHex(toCompactBigEndian(_bi.number), 1);
-	_o["gasLimit"] = "0x" + toHex(toCompactBigEndian(_bi.gasLimit), 1);
-	_o["gasUsed"] = "0x" + toHex(toCompactBigEndian(_bi.gasUsed), 1);
-	_o["timestamp"] = "0x" + toHex(toCompactBigEndian(_bi.timestamp), 1);
+	_o["difficulty"] = "0x" + toHex(toCompactBigEndian(_bi.difficulty, 1));
+	_o["number"] = "0x" + toHex(toCompactBigEndian(_bi.number, 1));
+	_o["gasLimit"] = "0x" + toHex(toCompactBigEndian(_bi.gasLimit, 1));
+	_o["gasUsed"] = "0x" + toHex(toCompactBigEndian(_bi.gasUsed, 1));
+	_o["timestamp"] = "0x" + toHex(toCompactBigEndian(_bi.timestamp, 1));
 	_o["extraData"] ="0x" + toHex(_bi.extraData);
 	_o["mixHash"] = toString(_bi.mixHash);
 	_o["nonce"] = toString(_bi.nonce);