diff --git a/TestHelper.h b/TestHelper.h
index c97d4c017..42f85a82c 100644
--- a/TestHelper.h
+++ b/TestHelper.h
@@ -188,6 +188,7 @@ json_spirit::mObject fillJsonWithTransaction(eth::Transaction _txn);
 void doTransactionTests(json_spirit::mValue& _v, bool _fillin);
 void doStateTests(json_spirit::mValue& v, bool _fillin);
 void doVMTests(json_spirit::mValue& v, bool _fillin);
+void doBlockchainTests(json_spirit::mValue& _v, bool _fillin);
 
 template<typename mapType>
 void checkAddresses(mapType& _expectedAddrs, mapType& _resultAddrs)