diff --git a/alethzero/MainWin.h b/alethzero/MainWin.h
index 193f8e364..efff89d2b 100644
--- a/alethzero/MainWin.h
+++ b/alethzero/MainWin.h
@@ -238,7 +238,7 @@ private:
 	void installNameRegWatch();
 	void installBalancesWatch();
 
-	virtual void timerEvent(QTimerEvent*);
+	virtual void timerEvent(QTimerEvent*) override;
 
 	void refreshNetwork();
 	void refreshMining();
diff --git a/alethzero/NatspecHandler.h b/alethzero/NatspecHandler.h
index 7aeafec41..241df4e06 100644
--- a/alethzero/NatspecHandler.h
+++ b/alethzero/NatspecHandler.h
@@ -39,17 +39,17 @@ class NatspecHandler: public NatSpecFace
 	~NatspecHandler();
 
 	/// Stores locally in a levelDB a key value pair of contract code hash to natspec documentation
-	void add(dev::h256 const& _contractHash, std::string const& _doc);
+	virtual void add(dev::h256 const& _contractHash, std::string const& _doc) override;
 	/// Retrieves the natspec documentation as a string given a contract code hash
 	std::string retrieve(dev::h256 const& _contractHash) const override;
 
 	/// Given a json natspec string and the transaction data return the user notice
-	std::string getUserNotice(std::string const& json, const dev::bytes& _transactionData);
+	virtual std::string getUserNotice(std::string const& json, const dev::bytes& _transactionData) override;
 	/// Given a contract code hash and the transaction's data retrieve the natspec documention's
 	/// user notice for that transaction.
 	/// @returns The user notice or an empty string if no natspec for the contract exists
 	///          or if the existing natspec does not document the @c _methodName
-	std::string getUserNotice(dev::h256 const& _contractHash, dev::bytes const& _transactionDacta);
+	virtual std::string getUserNotice(dev::h256 const& _contractHash, dev::bytes const& _transactionDacta) override;
 	
   private:
 	ldb::ReadOptions m_readOptions;
diff --git a/json_spirit/json_spirit_writer_template.h b/json_spirit/json_spirit_writer_template.h
index dbd0f45da..5376ef476 100644
--- a/json_spirit/json_spirit_writer_template.h
+++ b/json_spirit/json_spirit_writer_template.h
@@ -25,13 +25,9 @@ namespace json_spirit
         return 'A' - 10 + ch;
     }
 
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wunused-local-typedefs")
 	template< class String_type >
     String_type non_printable_to_string( unsigned int c )
     {
-        typedef typename String_type::value_type Char_type;
-
         String_type result( 6, '\\' );
 
         result[1] = 'u';
@@ -43,7 +39,6 @@ namespace json_spirit
 
         return result;
     }
-#pragma GCC diagnostic pop
 
     template< typename Char_type, class String_type >
     bool add_esc_char( Char_type c, String_type& s )
diff --git a/libdevcrypto/Common.cpp b/libdevcrypto/Common.cpp
index e68381427..4ebd6a04b 100644
--- a/libdevcrypto/Common.cpp
+++ b/libdevcrypto/Common.cpp
@@ -54,7 +54,7 @@ Public dev::toPublic(Secret const& _secret)
 {
 	Public p;
 	s_secp256k1.toPublic(_secret, p);
-	return std::move(p);
+	return p;
 }
 
 Address dev::toAddress(Public const& _public)
@@ -230,7 +230,7 @@ h256 crypto::kdf(Secret const& _priv, h256 const& _hash)
 	
 	if (!s || !_hash || !_priv)
 		BOOST_THROW_EXCEPTION(InvalidState());
-	return std::move(s);
+	return s;
 }
 
 h256 Nonce::get(bool _commit)
diff --git a/libdevcrypto/CryptoPP.cpp b/libdevcrypto/CryptoPP.cpp
index b701fed8d..9b550a666 100644
--- a/libdevcrypto/CryptoPP.cpp
+++ b/libdevcrypto/CryptoPP.cpp
@@ -61,7 +61,7 @@ bytes Secp256k1::eciesKDF(Secret _z, bytes _s1, unsigned kdByteLen)
 	}
 	
 	k.resize(kdByteLen);
-	return move(k);
+	return k;
 }
 
 void Secp256k1::encryptECIES(Public const& _k, bytes& io_cipher)
diff --git a/libdevcrypto/CryptoPP.h b/libdevcrypto/CryptoPP.h
index ca8a2e6b5..377da8754 100644
--- a/libdevcrypto/CryptoPP.h
+++ b/libdevcrypto/CryptoPP.h
@@ -59,7 +59,7 @@ namespace crypto
 
 using namespace CryptoPP;
 
-inline ECP::Point publicToPoint(Public const& _p) { Integer x(_p.data(), 32); Integer y(_p.data() + 32, 32); return std::move(ECP::Point(x,y)); }
+inline ECP::Point publicToPoint(Public const& _p) { Integer x(_p.data(), 32); Integer y(_p.data() + 32, 32); return ECP::Point(x,y); }
 
 inline Integer secretToExponent(Secret const& _s) { return std::move(Integer(_s.data(), Secret::size)); }
 
diff --git a/libdevcrypto/OverlayDB.cpp b/libdevcrypto/OverlayDB.cpp
index 80c901635..05b9877ad 100644
--- a/libdevcrypto/OverlayDB.cpp
+++ b/libdevcrypto/OverlayDB.cpp
@@ -95,7 +95,7 @@ bytes OverlayDB::lookupAux(h256 const& _h) const
 {
 	bytes ret = MemoryDB::lookupAux(_h);
 	if (!ret.empty() || !m_db)
-		return move(ret);
+		return ret;
 	std::string v;
 	bytes b = _h.asBytes();
 	b.push_back(255);	// for aux
@@ -116,7 +116,7 @@ std::string OverlayDB::lookup(h256 const& _h) const
 	std::string ret = MemoryDB::lookup(_h);
 	if (ret.empty() && m_db)
 		m_db->Get(m_readOptions, ldb::Slice((char const*)_h.data(), 32), &ret);
-	return move(ret);
+	return ret;
 }
 
 bool OverlayDB::exists(h256 const& _h) const
diff --git a/libethereum/Client.h b/libethereum/Client.h
index 5132b5a30..87209a667 100644
--- a/libethereum/Client.h
+++ b/libethereum/Client.h
@@ -143,7 +143,7 @@ public:
 	ExecutionResult call(Address _dest, bytes const& _data = bytes(), u256 _gas = 125000, u256 _value = 0, u256 _gasPrice = 1 * ether, Address const& _from = Address());
 
 	/// Get the remaining gas limit in this block.
-	virtual u256 gasLimitRemaining() const { return m_postMine.gasLimitRemaining(); }
+	virtual u256 gasLimitRemaining() const override { return m_postMine.gasLimitRemaining(); }
 
 	// [PRIVATE API - only relevant for base clients, not available in general]
 	dev::eth::State state(unsigned _txi, h256 _block) const;
@@ -159,7 +159,7 @@ public:
 
 	// Mining stuff:
 
-	void setAddress(Address _us) { WriteGuard l(x_preMine); m_preMine.setAddress(_us); }
+	virtual void setAddress(Address _us) override { WriteGuard l(x_preMine); m_preMine.setAddress(_us); }
 
 	/// Check block validity prior to mining.
 	bool miningParanoia() const { return m_paranoia; }
diff --git a/libethereum/ClientBase.h b/libethereum/ClientBase.h
index 2b271b1df..c55dae96d 100644
--- a/libethereum/ClientBase.h
+++ b/libethereum/ClientBase.h
@@ -132,8 +132,8 @@ public:
 	virtual Transactions pending() const override;
 	virtual h256s pendingHashes() const override;
 
-	ImportResult injectTransaction(bytes const& _rlp) override { prepareForTransaction(); return m_tq.import(_rlp); }
-	ImportResult injectBlock(bytes const& _block);
+	virtual ImportResult injectTransaction(bytes const& _rlp) override { prepareForTransaction(); return m_tq.import(_rlp); }
+	virtual ImportResult injectBlock(bytes const& _block) override;
 
 	using Interface::diff;
 	virtual StateDiff diff(unsigned _txi, h256 _block) const override;
@@ -143,9 +143,6 @@ public:
 	virtual Addresses addresses(BlockNumber _block) const override;
 	virtual u256 gasLimitRemaining() const override;
 
-	/// Set the coinbase address
-	virtual void setAddress(Address _us) = 0;
-
 	/// Get the coinbase address
 	virtual Address address() const override;
 
diff --git a/libevmasm/Assembly.cpp b/libevmasm/Assembly.cpp
index 8642824f6..3557fc0ee 100644
--- a/libevmasm/Assembly.cpp
+++ b/libevmasm/Assembly.cpp
@@ -109,7 +109,7 @@ string Assembly::getLocationFromSources(StringMap const& _sourceCodes, SourceLoc
 	if (newLinePos != string::npos)
 		cut = cut.substr(0, newLinePos) + "...";
 
-	return move(cut);
+	return cut;
 }
 
 ostream& Assembly::streamAsm(ostream& _out, string const& _prefix, StringMap const& _sourceCodes) const
diff --git a/libp2p/Common.h b/libp2p/Common.h
index 8fd330580..4a1b64b70 100644
--- a/libp2p/Common.h
+++ b/libp2p/Common.h
@@ -183,8 +183,8 @@ struct NodeIPEndpoint
 	uint16_t udpPort = 0;
 	uint16_t tcpPort = 0;
 	
-	operator bi::udp::endpoint() const { return std::move(bi::udp::endpoint(address, udpPort)); }
-	operator bi::tcp::endpoint() const { return std::move(bi::tcp::endpoint(address, tcpPort)); }
+	operator bi::udp::endpoint() const { return bi::udp::endpoint(address, udpPort); }
+	operator bi::tcp::endpoint() const { return bi::tcp::endpoint(address, tcpPort); }
 	
 	operator bool() const { return !address.is_unspecified() && udpPort > 0 && tcpPort > 0; }
 	
diff --git a/libp2p/Host.cpp b/libp2p/Host.cpp
index b6c9efec9..f47db3c2b 100644
--- a/libp2p/Host.cpp
+++ b/libp2p/Host.cpp
@@ -834,7 +834,7 @@ KeyPair Host::networkAlias(bytesConstRef _b)
 {
 	RLP r(_b);
 	if (r.itemCount() == 3 && r[0].isInt() && r[0].toInt<unsigned>() >= 3)
-		return move(KeyPair(move(Secret(r[1].toBytes()))));
+		return KeyPair(Secret(r[1].toBytes()));
 	else
-		return move(KeyPair::create());
+		return KeyPair::create();
 }
diff --git a/libp2p/Network.cpp b/libp2p/Network.cpp
index d8ab90a20..2f2f247b6 100644
--- a/libp2p/Network.cpp
+++ b/libp2p/Network.cpp
@@ -111,7 +111,7 @@ std::set<bi::address> Network::getInterfaceAddresses()
 
 #endif
 
-	return std::move(addresses);
+	return addresses;
 }
 
 int Network::tcp4Listen(bi::tcp::acceptor& _acceptor, NetworkPreferences const& _netPrefs)
diff --git a/libp2p/NodeTable.cpp b/libp2p/NodeTable.cpp
index bf056c52f..078b4409b 100644
--- a/libp2p/NodeTable.cpp
+++ b/libp2p/NodeTable.cpp
@@ -88,7 +88,7 @@ shared_ptr<NodeEntry> NodeTable::addNode(Node const& _node, NodeRelation _relati
 	}
 	
 	if (!_node.endpoint)
-		return move(shared_ptr<NodeEntry>());
+		return shared_ptr<NodeEntry>();
 	
 	// ping address to recover nodeid if nodeid is empty
 	if (!_node.id)
@@ -98,7 +98,7 @@ shared_ptr<NodeEntry> NodeTable::addNode(Node const& _node, NodeRelation _relati
 		DEV_GUARDED(x_pubkDiscoverPings)
 			m_pubkDiscoverPings[_node.endpoint.address] = std::chrono::steady_clock::now();
 		ping(_node.endpoint);
-		return move(shared_ptr<NodeEntry>());
+		return shared_ptr<NodeEntry>();
 	}
 	
 	DEV_GUARDED(x_nodes)
@@ -129,7 +129,7 @@ list<NodeId> NodeTable::nodes() const
 	DEV_GUARDED(x_nodes)
 		for (auto& i: m_nodes)
 			nodes.push_back(i.second->id);
-	return move(nodes);
+	return nodes;
 }
 
 list<NodeEntry> NodeTable::snapshot() const
@@ -140,7 +140,7 @@ list<NodeEntry> NodeTable::snapshot() const
 			for (auto const& np: s.nodes)
 				if (auto n = np.lock())
 					ret.push_back(*n);
-	return move(ret);
+	return ret;
 }
 
 Node NodeTable::node(NodeId const& _id)
@@ -282,7 +282,7 @@ vector<shared_ptr<NodeEntry>> NodeTable::nearestNodeEntries(NodeId _target)
 		for (auto const& n: nodes.second)
 			if (ret.size() < s_bucketSize && !!n->endpoint && n->endpoint.isAllowed())
 				ret.push_back(n);
-	return move(ret);
+	return ret;
 }
 
 void NodeTable::ping(NodeIPEndpoint _to) const
diff --git a/libp2p/RLPxFrameIO.cpp b/libp2p/RLPxFrameIO.cpp
index ac1a27bed..4fa8557ba 100644
--- a/libp2p/RLPxFrameIO.cpp
+++ b/libp2p/RLPxFrameIO.cpp
@@ -154,7 +154,7 @@ h128 RLPXFrameIO::egressDigest()
 	SHA3_256 h(m_egressMac);
 	h128 digest;
 	h.TruncatedFinal(digest.data(), h128::size);
-	return move(digest);
+	return digest;
 }
 
 h128 RLPXFrameIO::ingressDigest()
@@ -162,7 +162,7 @@ h128 RLPXFrameIO::ingressDigest()
 	SHA3_256 h(m_ingressMac);
 	h128 digest;
 	h.TruncatedFinal(digest.data(), h128::size);
-	return move(digest);
+	return digest;
 }
 
 void RLPXFrameIO::updateEgressMACWithHeader(bytesConstRef _headerCipher)
diff --git a/libp2p/UDP.cpp b/libp2p/UDP.cpp
index 9f89d9ad0..0b85bae4b 100644
--- a/libp2p/UDP.cpp
+++ b/libp2p/UDP.cpp
@@ -52,12 +52,12 @@ h256 RLPXDatagramFace::sign(Secret const& _k)
 	bytesConstRef signedRLPx(&data[h256::size], data.size() - h256::size);
 	dev::sha3(signedRLPx).ref().copyTo(rlpxHash);
 
-	return std::move(sighash);
+	return sighash;
 }
 
 Public RLPXDatagramFace::authenticate(bytesConstRef _sig, bytesConstRef _rlp)
 {
 	Signature const& sig = *(Signature const*)_sig.data();
-	return std::move(dev::recover(sig, sha3(_rlp)));
+	return dev::recover(sig, sha3(_rlp));
 }
 
diff --git a/libp2p/UDP.h b/libp2p/UDP.h
index 474cb5442..e345ce07f 100644
--- a/libp2p/UDP.h
+++ b/libp2p/UDP.h
@@ -81,7 +81,7 @@ template <class T>
 struct RLPXDatagram: public RLPXDatagramFace
 {
 	RLPXDatagram(bi::udp::endpoint const& _ep): RLPXDatagramFace(_ep) {}
-	static T fromBytesConstRef(bi::udp::endpoint const& _ep, bytesConstRef _bytes) { try { T t(_ep); t.interpretRLP(_bytes); return std::move(t); } catch(...) { T t(_ep); return std::move(t); } }
+	static T fromBytesConstRef(bi::udp::endpoint const& _ep, bytesConstRef _bytes) { try { T t(_ep); t.interpretRLP(_bytes); return t; } catch(...) { return T{_ep}; } }
 	uint8_t packetType() { return T::type; }
 };
 
diff --git a/libsolidity/AST.h b/libsolidity/AST.h
index 578709c1e..b3984840f 100644
--- a/libsolidity/AST.h
+++ b/libsolidity/AST.h
@@ -503,7 +503,7 @@ public:
 
 	/// Returns the declared or inferred type. Can be an empty pointer if no type was explicitly
 	/// declared and there is no assignment to the variable that fixes the type.
-	TypePointer getType(ContractDefinition const* = nullptr) const { return m_type; }
+	TypePointer getType(ContractDefinition const* = nullptr) const override { return m_type; }
 	void setType(std::shared_ptr<Type const> const& _type) { m_type = _type; }
 
 	virtual bool isLValue() const override;
diff --git a/libsolidity/CompilerContext.cpp b/libsolidity/CompilerContext.cpp
index 2edff82e1..fde6adacc 100644
--- a/libsolidity/CompilerContext.cpp
+++ b/libsolidity/CompilerContext.cpp
@@ -133,7 +133,7 @@ set<Declaration const*> CompilerContext::getFunctionsWithoutCode()
 	for (auto const& it: m_functionEntryLabels)
 		if (m_functionsWithCode.count(it.first) == 0)
 			functions.insert(it.first);
-	return move(functions);
+	return functions;
 }
 
 ModifierDefinition const& CompilerContext::getFunctionModifier(string const& _name) const
diff --git a/libsolidity/LValue.h b/libsolidity/LValue.h
index 1617e8167..726d63328 100644
--- a/libsolidity/LValue.h
+++ b/libsolidity/LValue.h
@@ -109,7 +109,7 @@ public:
 	StorageItem(CompilerContext& _compilerContext, Declaration const& _declaration);
 	/// Constructs the LValue and assumes that the storage reference is already on the stack.
 	StorageItem(CompilerContext& _compilerContext, Type const& _type);
-	virtual unsigned sizeOnStack() const { return 2; }
+	virtual unsigned sizeOnStack() const override { return 2; }
 	virtual void retrieveValue(SourceLocation const& _location, bool _remove = false) const override;
 	virtual void storeValue(
 		Type const& _sourceType,
diff --git a/libsolidity/Types.cpp b/libsolidity/Types.cpp
index 1316bbc37..e1161c3fb 100644
--- a/libsolidity/Types.cpp
+++ b/libsolidity/Types.cpp
@@ -1459,29 +1459,29 @@ MagicType::MagicType(MagicType::Kind _kind):
 	switch (m_kind)
 	{
 	case Kind::Block:
-		m_members = move(MemberList({
+		m_members = MemberList({
 			{"coinbase", make_shared<IntegerType>(0, IntegerType::Modifier::Address)},
 			{"timestamp", make_shared<IntegerType>(256)},
 			{"blockhash", make_shared<FunctionType>(strings{"uint"}, strings{"bytes32"}, FunctionType::Location::BlockHash)},
 			{"difficulty", make_shared<IntegerType>(256)},
 			{"number", make_shared<IntegerType>(256)},
 			{"gaslimit", make_shared<IntegerType>(256)}
-		}));
+		});
 		break;
 	case Kind::Message:
-		m_members = move(MemberList({
+		m_members = MemberList({
 			{"sender", make_shared<IntegerType>(0, IntegerType::Modifier::Address)},
 			{"gas", make_shared<IntegerType>(256)},
 			{"value", make_shared<IntegerType>(256)},
 			{"data", make_shared<ArrayType>(ReferenceType::Location::CallData)},
 			{"sig", make_shared<FixedBytesType>(4)}
-		}));
+		});
 		break;
 	case Kind::Transaction:
-		m_members = move(MemberList({
+		m_members = MemberList({
 			{"origin", make_shared<IntegerType>(0, IntegerType::Modifier::Address)},
 			{"gasprice", make_shared<IntegerType>(256)}
-		}));
+		});
 		break;
 	default:
 		BOOST_THROW_EXCEPTION(InternalCompilerError() << errinfo_comment("Unknown kind of magic."));
diff --git a/libsolidity/Types.h b/libsolidity/Types.h
index 3ec925395..17d30ea6c 100644
--- a/libsolidity/Types.h
+++ b/libsolidity/Types.h
@@ -407,7 +407,7 @@ public:
 	virtual TypePointer unaryOperatorResult(Token::Value _operator) const override;
 	virtual bool operator==(const Type& _other) const override;
 	virtual unsigned getCalldataEncodedSize(bool _padded) const override;
-	virtual bool isDynamicallySized() const { return m_hasDynamicLength; }
+	virtual bool isDynamicallySized() const override { return m_hasDynamicLength; }
 	virtual u256 getStorageSize() const override;
 	virtual unsigned getSizeOnStack() const override;
 	virtual std::string toString() const override;
@@ -820,7 +820,7 @@ public:
 		return TypePointer();
 	}
 
-	virtual bool operator==(Type const& _other) const;
+	virtual bool operator==(Type const& _other) const override;
 	virtual bool canBeStored() const override { return false; }
 	virtual bool canLiveOutsideStorage() const override { return true; }
 	virtual unsigned getSizeOnStack() const override { return 0; }
diff --git a/libtestutils/FixedClient.h b/libtestutils/FixedClient.h
index 59da9075f..bdec08849 100644
--- a/libtestutils/FixedClient.h
+++ b/libtestutils/FixedClient.h
@@ -48,7 +48,7 @@ public:
 	virtual eth::State asOf(h256 const& _h) const override;
 	virtual eth::State preMine() const override { ReadGuard l(x_stateDB); return m_state; }
 	virtual eth::State postMine() const override { ReadGuard l(x_stateDB); return m_state; }
-	virtual void setAddress(Address _us) { WriteGuard l(x_stateDB); m_state.setAddress(_us); }
+	virtual void setAddress(Address _us) override { WriteGuard l(x_stateDB); m_state.setAddress(_us); }
 	virtual void prepareForTransaction() override {}
 
 private:
diff --git a/libweb3jsonrpc/WebThreeStubServer.h b/libweb3jsonrpc/WebThreeStubServer.h
index 35c35c3f0..1eddc22d4 100644
--- a/libweb3jsonrpc/WebThreeStubServer.h
+++ b/libweb3jsonrpc/WebThreeStubServer.h
@@ -43,7 +43,7 @@ class WebThreeStubServer: public dev::WebThreeStubServerBase, public dev::WebThr
 public:
 	WebThreeStubServer(jsonrpc::AbstractServerConnector& _conn, dev::WebThreeDirect& _web3, std::shared_ptr<dev::eth::AccountHolder> const& _ethAccounts, std::vector<dev::KeyPair> const& _shhAccounts);
 
-	virtual std::string web3_clientVersion();
+	virtual std::string web3_clientVersion() override;
 
 private:
 	virtual dev::eth::Interface* client() override;
diff --git a/libwhisper/WhisperHost.h b/libwhisper/WhisperHost.h
index c5ec5867b..87563d9e8 100644
--- a/libwhisper/WhisperHost.h
+++ b/libwhisper/WhisperHost.h
@@ -54,7 +54,7 @@ public:
 
 	virtual void inject(Envelope const& _e, WhisperPeer* _from = nullptr) override;
 
-	virtual Topics const& fullTopics(unsigned _id) const { try { return m_filters.at(m_watches.at(_id).id).full; } catch (...) { return EmptyTopics; } }
+	virtual Topics const& fullTopics(unsigned _id) const override { try { return m_filters.at(m_watches.at(_id).id).full; } catch (...) { return EmptyTopics; } }
 	virtual unsigned installWatch(Topics const& _filter) override;
 	virtual unsigned installWatchOnId(h256 _filterId) override;
 	virtual void uninstallWatch(unsigned _watchId) override;
@@ -69,11 +69,11 @@ public:
 	void cleanup();
 
 protected:
-	void doWork();
+	virtual void doWork() override;
 
 private:
-	virtual void onStarting() { startWorking(); }
-	virtual void onStopping() { stopWorking(); }
+	virtual void onStarting() override { startWorking(); }
+	virtual void onStopping() override { stopWorking(); }
 
 	void streamMessage(h256 _m, RLPStream& _s) const;
 
diff --git a/mix/CodeModel.cpp b/mix/CodeModel.cpp
index 434cf1e7d..1ca5d9160 100644
--- a/mix/CodeModel.cpp
+++ b/mix/CodeModel.cpp
@@ -67,7 +67,7 @@ private:
 		return LocationPair(_node.getLocation().start, _node.getLocation().end);
 	}
 
-	virtual bool visit(FunctionDefinition const&)
+	virtual bool visit(FunctionDefinition const&) override
 	{
 		m_functionScope = true;
 		return true;
diff --git a/mix/MixClient.h b/mix/MixClient.h
index 4c5b51a09..ea6416ac4 100644
--- a/mix/MixClient.h
+++ b/mix/MixClient.h
@@ -80,7 +80,7 @@ protected:
 	/// ClientBase methods
 	using ClientBase::asOf;
 	virtual dev::eth::State asOf(h256 const& _block) const override;
-	virtual dev::eth::BlockChain& bc() { return *m_bc; }
+	virtual dev::eth::BlockChain& bc() override { return *m_bc; }
 	virtual dev::eth::BlockChain const& bc() const override { return *m_bc; }
 	virtual dev::eth::State preMine() const override { ReadGuard l(x_state);  return m_startState; }
 	virtual dev::eth::State postMine() const override { ReadGuard l(x_state); return m_state; }
diff --git a/test/libp2p/net.cpp b/test/libp2p/net.cpp
index 1cd43b13f..a31537b98 100644
--- a/test/libp2p/net.cpp
+++ b/test/libp2p/net.cpp
@@ -74,7 +74,7 @@ struct TestNodeTable: public NodeTable
 			ret.push_back(make_pair(k,s_basePort+i));
 		}
 
-		return std::move(ret);
+		return ret;
 	}
 
 	void pingTestNodes(std::vector<std::pair<KeyPair,unsigned>> const& _testNodes)
diff --git a/test/libwhisper/whisperMessage.cpp b/test/libwhisper/whisperMessage.cpp
index 56a763622..343573713 100644
--- a/test/libwhisper/whisperMessage.cpp
+++ b/test/libwhisper/whisperMessage.cpp
@@ -37,7 +37,7 @@ Topics createRandomTopics(unsigned int i)
 		ret.push_back(t);
 	}
 
-	return move(ret);
+	return ret;
 }
 
 bytes createRandomPayload(unsigned int i)
@@ -48,7 +48,7 @@ bytes createRandomPayload(unsigned int i)
 	for (int j = 0; j < sz; ++j)
 		ret.push_back(rand() % 256);
 
-	return move(ret);
+	return ret;
 }
 
 void comparePayloads(Message const& m1, Message const& m2)