diff --git a/test/state/state.cpp b/test/state/state.cpp
index 8697636eda..08e5ec2ded 100644
--- a/test/state/state.cpp
+++ b/test/state/state.cpp
@@ -610,4 +610,56 @@ std::variant<TransactionReceipt, std::error_code> transition(State& state, const
         withdrawal.amount_in_gwei);
 }
 
+[[nodiscard]] std::string get_tests_invalid_tx_message(ErrorCode errc) noexcept
+{
+    switch (errc)
+    {
+    case SUCCESS:
+        return "";
+    case INTRINSIC_GAS_TOO_LOW:
+        return "TR_IntrinsicGas";
+    case TX_TYPE_NOT_SUPPORTED:
+        return "TR_TypeNotSupported";
+    case INSUFFICIENT_FUNDS:
+        return "TR_NoFunds";
+    case NONCE_HAS_MAX_VALUE:
+        return "TR_NonceHasMaxValue:";
+    case NONCE_TOO_HIGH:
+        return "TR_NonceTooHigh";
+    case NONCE_TOO_LOW:
+        return "TR_NonceTooLow";
+    case TIP_GT_FEE_CAP:
+        return "TR_TipGtFeeCap";
+    case FEE_CAP_LESS_THEN_BLOCKS:
+        return "TR_FeeCapLessThanBlocks";
+    case GAS_LIMIT_REACHED:
+        return "TR_GasLimitReached";
+    case SENDER_NOT_EOA:
+        return "SenderNotEOA";
+    case INIT_CODE_SIZE_LIMIT_EXCEEDED:
+        return "TR_InitCodeLimitExceeded";
+    case INIT_CODE_EMPTY:
+        return "TR_InitCodeEmpty";
+    case INIT_CODE_COUNT_LIMIT_EXCEEDED:
+        return "TR_InitCodeCountLimitExceeded";
+    case INIT_CODE_COUNT_ZERO:
+        return "TR_InitCodeCountZero";
+    case CREATE_BLOB_TX:
+        return "TR_BLOBCREATE";
+    case EMPTY_BLOB_HASHES_LIST:
+        return "TR_EMPTYBLOB";
+    case INVALID_BLOB_HASH_VERSION:
+        return "TR_BLOBVERSION_INVALID";
+    case BLOB_GAS_LIMIT_EXCEEDED:
+        return "TR_BLOBLIST_OVERSIZE";
+    case EOF_CREATION_TRANSACTION:
+        return "TR_EOFCreationTransaction";
+    case UNKNOWN_ERROR:
+        return "Unknown error";
+    default:
+        assert(false);
+        return "Wrong error code";
+    }
+}
+
 }  // namespace evmone::state
diff --git a/test/state/state.hpp b/test/state/state.hpp
index 61de8c43a3..e5b66a254a 100644
--- a/test/state/state.hpp
+++ b/test/state/state.hpp
@@ -6,6 +6,7 @@
 
 #include "account.hpp"
 #include "bloom_filter.hpp"
+#include "errors.hpp"
 #include "hash_utils.hpp"
 #include <cassert>
 #include <optional>
@@ -293,4 +294,6 @@ void system_call(State& state, const BlockInfo& block, evmc_revision rev, evmc::
 /// Defines how to RLP-encode a Withdrawal.
 [[nodiscard]] bytes rlp_encode(const Withdrawal& withdrawal);
 
+[[nodiscard]] std::string get_tests_invalid_tx_message(ErrorCode errc) noexcept;
+
 }  // namespace evmone::state
diff --git a/test/unittests/state_transition.cpp b/test/unittests/state_transition.cpp
index 4cf4eb2068..7f6fdd8732 100644
--- a/test/unittests/state_transition.cpp
+++ b/test/unittests/state_transition.cpp
@@ -230,7 +230,8 @@ void state_transition::export_state_test(
 
     if (holds_alternative<std::error_code>(res))
     {
-        jpost["expectException"] = std::get<std::error_code>(res).message();
+        jpost["expectException"] = get_tests_invalid_tx_message(
+            static_cast<ErrorCode>(std::get<std::error_code>(res).value()));
         jpost["logs"] = hex0x(logs_hash(std::vector<Log>()));
     }
     else