diff --git a/test/TestHelper.cpp b/test/TestHelper.cpp
index ea0bf341c..b0935d0b6 100644
--- a/test/TestHelper.cpp
+++ b/test/TestHelper.cpp
@@ -329,6 +329,12 @@ void checkStorage(map<u256, u256> _expectedStore, map<u256, u256> _resultStore,
 			BOOST_CHECK_MESSAGE(expectedStoreValue == resultStoreValue, _expectedAddr << ": store[" << expectedStoreKey << "] = " << resultStoreValue << ", expected " << expectedStoreValue);
 		}
 	}
+
+    for (auto&& resultStorePair : _resultStore)
+    {
+        if (!_expectedStore.count(resultStorePair.first))
+            BOOST_ERROR("unexpected result store key " << resultStorePair.first);
+    }
 }
 
 void checkLog(LogEntries _resultLogs, LogEntries _expectedLogs)