diff --git a/test/TestHelper.cpp b/test/TestHelper.cpp
index 873ea21e2..733ccb6d0 100644
--- a/test/TestHelper.cpp
+++ b/test/TestHelper.cpp
@@ -352,6 +352,8 @@ void ImportTest::exportTest(bytes const& _output, State const& _statePost)
 			BOOST_CHECK_MESSAGE((m_TestObject["out"].get_str() == m_TestObject["expectOut"].get_str()), warning);
 		else
 			BOOST_WARN_MESSAGE((m_TestObject["out"].get_str() == m_TestObject["expectOut"].get_str()), warning);
+
+		m_TestObject.erase(m_TestObject.find("expectOut"));
 	}
 
 	// export logs
diff --git a/test/libevm/vm.cpp b/test/libevm/vm.cpp
index ec66837e1..5bbab2e1c 100644
--- a/test/libevm/vm.cpp
+++ b/test/libevm/vm.cpp
@@ -388,6 +388,19 @@ void doVMTests(json_spirit::mValue& v, bool _fillin)
 
 				o["callcreates"] = fev.exportCallCreates();
 				o["out"] = output.size() > 4096 ? "#" + toString(output.size()) : toHex(output, 2, HexPrefix::Add);
+
+				// compare expected output with post output
+				if (o.count("expectOut") > 0)
+				{
+					std::string warning = "Check State: Error! Unexpected output: " + o["out"].get_str() + " Expected: " + o["expectOut"].get_str();
+					if (Options::get().checkState)
+						BOOST_CHECK_MESSAGE((o["out"].get_str() == o["expectOut"].get_str()), warning);
+					else
+						BOOST_WARN_MESSAGE((o["out"].get_str() == o["expectOut"].get_str()), warning);
+
+					o.erase(o.find("expectOut"));
+				}
+
 				o["gas"] = toCompactHex(fev.gas, HexPrefix::Add, 1);
 				o["logs"] = exportLog(fev.sub.logs);
 			}