diff --git a/libtestutils/BlockChainLoader.cpp b/libtestutils/BlockChainLoader.cpp
index 224e40ec5..eafab190e 100644
--- a/libtestutils/BlockChainLoader.cpp
+++ b/libtestutils/BlockChainLoader.cpp
@@ -34,7 +34,6 @@ namespace test
 {
 dev::eth::BlockInfo toBlockInfo(Json::Value const& _json);
 bytes toGenesisBlock(Json::Value const& _json);
-
 }
 }
 
diff --git a/libtestutils/BlockChainLoader.h b/libtestutils/BlockChainLoader.h
index ed110ff6f..728860727 100644
--- a/libtestutils/BlockChainLoader.h
+++ b/libtestutils/BlockChainLoader.h
@@ -39,9 +39,9 @@ class BlockChainLoader
 {
 public:
 	BlockChainLoader(Json::Value const& _json);
-	eth::BlockChain& bc() { return *m_bc; }
-	eth::State state() { return m_state; }
-	
+	eth::BlockChain const& bc() const { return *m_bc; }
+	eth::State const& state() const { return m_state; }
+
 private:
 	ShortLivingDirectory m_dir;
 	std::auto_ptr<eth::BlockChain> m_bc;
diff --git a/libtestutils/ShortLivingDirectory.h b/libtestutils/ShortLivingDirectory.h
index bab6a1c20..10b542f06 100644
--- a/libtestutils/ShortLivingDirectory.h
+++ b/libtestutils/ShortLivingDirectory.h
@@ -40,7 +40,7 @@ public:
 	ShortLivingDirectory(std::string const& _path = getRandomPath());
 	~ShortLivingDirectory();
 
-	std::string const& path() { return m_path; }
+	std::string const& path() const { return m_path; }
 
 private:
 	std::string m_path;
diff --git a/libtestutils/StateLoader.h b/libtestutils/StateLoader.h
index e8f955440..e5843d0b4 100644
--- a/libtestutils/StateLoader.h
+++ b/libtestutils/StateLoader.h
@@ -36,7 +36,7 @@ class StateLoader
 {
 public:
 	StateLoader(Json::Value const& _json);
-	eth::State const& state() { return m_state; }
+	eth::State const& state() const { return m_state; }
 
 private:
 	eth::State m_state;