diff --git a/dbms/programs/client/TestHint.h b/dbms/programs/client/TestHint.h
index b260bead0ba..81937435b2e 100644
--- a/dbms/programs/client/TestHint.h
+++ b/dbms/programs/client/TestHint.h
@@ -13,7 +13,7 @@ namespace DB
 
 namespace ErrorCodes
 {
-    extern const int LOGICAL_ERROR;
+    extern const int UNEXPECTED_ERROR_CODE;
 }
 
 
@@ -74,7 +74,7 @@ public:
             std::cerr << "Success when error expected. It expects server error "
                 << server_error << ", client error " << client_error << "." << std::endl;
             got_exception = true;
-            last_exception = std::make_unique<Exception>("Success when error expected", ErrorCodes::LOGICAL_ERROR); /// return error to OS
+            last_exception = std::make_unique<Exception>("Success when error expected", ErrorCodes::UNEXPECTED_ERROR_CODE); /// return error to OS
             return false;
         }
 
diff --git a/dbms/src/Common/ErrorCodes.cpp b/dbms/src/Common/ErrorCodes.cpp
index f20c7920a12..c84d5c6c74a 100644
--- a/dbms/src/Common/ErrorCodes.cpp
+++ b/dbms/src/Common/ErrorCodes.cpp
@@ -476,6 +476,7 @@ namespace ErrorCodes
     extern const int CANNOT_CREATE_DATABASE = 501;
     extern const int CANNOT_SIGQUEUE = 502;
     extern const int AGGREGATE_FUNCTION_THROW = 503;
+    extern const int UNEXPECTED_ERROR_CODE = 504;
 
     extern const int KEEPER_EXCEPTION = 999;
     extern const int POCO_EXCEPTION = 1000;