diff --git a/tests/transaction_test_util.go b/tests/transaction_test_util.go
index ec214bb1d5..116707d8ac 100644
--- a/tests/transaction_test_util.go
+++ b/tests/transaction_test_util.go
@@ -153,3 +153,35 @@ func (tt *TransactionTest) Run() error {
 	}
 	return nil
 }
+
+func getRules(config *params.ChainConfig, fork string) (params.Rules, error) {
+	switch fork {
+	case "Frontier":
+		return config.Rules(new(big.Int), false, 0), nil
+	case "Homestead":
+		return config.Rules(config.HomesteadBlock, false, 0), nil
+	case "EIP150":
+		return config.Rules(config.EIP150Block, false, 0), nil
+	case "EIP158":
+		return config.Rules(config.EIP158Block, false, 0), nil
+	case "Byzantium":
+		return config.Rules(config.ByzantiumBlock, false, 0), nil
+	case "Constantinople":
+		return config.Rules(config.ConstantinopleBlock, false, 0), nil
+	case "Istanbul":
+		return config.Rules(config.IstanbulBlock, false, 0), nil
+	case "Berlin":
+		return config.Rules(config.BerlinBlock, false, 0), nil
+	case "London":
+		return config.Rules(config.LondonBlock, false, 0), nil
+	case "Paris":
+		return config.Rules(config.LondonBlock, true, 0), nil
+	case "Shanghai":
+		return config.Rules(config.LondonBlock, true, *config.ShanghaiTime), nil
+	case "Cancun":
+		return config.Rules(config.LondonBlock, true, *config.CancunTime), nil
+	case "Prague":
+		return config.Rules(config.LondonBlock, true, *config.PragueTime), nil
+	}
+	return params.Rules{}, UnsupportedForkError{Name: fork}
+}