diff --git a/.github/workflows/rust.yml b/.github/workflows/rust.yml
index 40a02f9b1..b93096c74 100644
--- a/.github/workflows/rust.yml
+++ b/.github/workflows/rust.yml
@@ -36,4 +36,5 @@ jobs:
     - name: Run tests
       run: |
         cargo run --release --verbose -p jsontests -- \
-        jsontests/res/ethtests/GeneralStateTests/stExample/add11.json
+        jsontests/res/ethtests/GeneralStateTests/stExample/add11.json \
+        jsontests/res/ethtests/GeneralStateTests/stSLoadTest/
diff --git a/jsontests/src/error.rs b/jsontests/src/error.rs
index 80b93aac0..32d6346bc 100644
--- a/jsontests/src/error.rs
+++ b/jsontests/src/error.rs
@@ -16,6 +16,8 @@ pub enum Error {
 	EVM(#[from] evm::ExitError),
 	#[error("unsupported fork")]
 	UnsupportedFork,
+	#[error("non-utf8 filename")]
+	NonUtf8Filename,
 	#[error("test error")]
 	Test(#[from] TestError),
 }
diff --git a/jsontests/src/main.rs b/jsontests/src/main.rs
index 2b0c573bf..38d2fe8e0 100644
--- a/jsontests/src/main.rs
+++ b/jsontests/src/main.rs
@@ -7,32 +7,61 @@ use crate::error::Error;
 use crate::types::*;
 use clap::Parser;
 use std::collections::BTreeMap;
-use std::fs::File;
+use std::fs::{self, File};
 use std::io::BufReader;
 
 #[derive(Parser)]
 #[command(author, version, about, long_about = None)]
 struct Cli {
-	filename: String,
+	filenames: Vec<String>,
 }
 
-fn main() -> Result<(), Error> {
-	let cli = Cli::parse();
-
+fn run_file(filename: &str) -> Result<(), Error> {
 	let test_multi: BTreeMap<String, TestMulti> =
-		serde_json::from_reader(BufReader::new(File::open(cli.filename)?))?;
+		serde_json::from_reader(BufReader::new(File::open(filename)?))?;
 
 	for (test_name, test_multi) in test_multi {
 		let tests = test_multi.tests();
 
 		for test in tests {
-			match crate::run::run_test(&test_name, test) {
-				Ok(()) => println!("succeed"),
+			print!(
+				"{}/{}/{:?}/{}: ",
+				filename, test_name, test.fork, test.index
+			);
+			match crate::run::run_test(filename, &test_name, test) {
+				Ok(()) => println!("okay"),
 				Err(Error::UnsupportedFork) => println!("skipped"),
-				Err(err) => Err(err)?,
+				Err(err) => {
+					println!("err {:?}", err);
+					return Err(err);
+				}
 			}
 		}
 	}
 
 	Ok(())
 }
+
+fn run_single(filename: &str) -> Result<(), Error> {
+	if fs::metadata(&filename)?.is_dir() {
+		for filename in fs::read_dir(&filename)? {
+			let filepath = filename?.path();
+			let filename = filepath.to_str().ok_or(Error::NonUtf8Filename)?;
+			run_file(filename)?;
+		}
+	} else {
+		run_file(&filename)?;
+	}
+
+	Ok(())
+}
+
+fn main() -> Result<(), Error> {
+	let cli = Cli::parse();
+
+	for filename in cli.filenames {
+		run_single(&filename)?;
+	}
+
+	Ok(())
+}
diff --git a/jsontests/src/run.rs b/jsontests/src/run.rs
index 4b2c4304b..7d4044b72 100644
--- a/jsontests/src/run.rs
+++ b/jsontests/src/run.rs
@@ -8,12 +8,7 @@ use evm::utils::u256_to_h256;
 use primitive_types::U256;
 use std::collections::{BTreeMap, BTreeSet};
 
-pub fn run_test(test_name: &str, test: Test) -> Result<(), Error> {
-	println!(
-		"test name: {}, fork: {:?}, index: {}",
-		test_name, test.fork, test.index
-	);
-
+pub fn run_test(_filename: &str, _test_name: &str, test: Test) -> Result<(), Error> {
 	let config = match test.fork {
 		Fork::Berlin => Config::berlin(),
 		_ => return Err(Error::UnsupportedFork),
@@ -67,7 +62,7 @@ pub fn run_test(test_name: &str, test: Test) -> Result<(), Error> {
 
 	let etable = Etable::runtime();
 	let invoker = Invoker::new(&config);
-	let result = invoker.transact_call(
+	let _result = invoker.transact_call(
 		test.transaction.sender,
 		test.transaction.to,
 		test.transaction.value,
@@ -81,9 +76,6 @@ pub fn run_test(test_name: &str, test: Test) -> Result<(), Error> {
 
 	let state_root = crate::hash::state_root(&backend);
 
-	println!("result: {:?}", result);
-	println!("state root: {:?}", state_root);
-
 	if state_root != test.post.hash {
 		return Err(TestError::StateMismatch.into());
 	}
diff --git a/jsontests/src/types.rs b/jsontests/src/types.rs
index ad70c79e4..d8863f05b 100644
--- a/jsontests/src/types.rs
+++ b/jsontests/src/types.rs
@@ -33,7 +33,7 @@ impl TestMulti {
 					transaction: TestTransaction {
 						data: self.transaction.data[post_state.indexes.data].0.clone(),
 						gas_limit: self.transaction.gas_limit[post_state.indexes.gas],
-						gas_price: self.transaction.gas_price,
+						gas_price: self.transaction.gas_price.unwrap_or(U256::zero()),
 						nonce: self.transaction.nonce,
 						secret_key: self.transaction.secret_key,
 						sender: self.transaction.sender,
@@ -96,6 +96,14 @@ pub enum Fork {
 	London,
 	Merge,
 	Shanghai,
+	Byzantium,
+	Constantinople,
+	ConstantinopleFix,
+	EIP150,
+	EIP158,
+	Frontier,
+	Homestead,
+	Istanbul,
 }
 
 #[derive(Clone, Debug, Eq, PartialEq, Deserialize)]
@@ -126,7 +134,9 @@ pub struct TestPreState {
 pub struct TestMultiTransaction {
 	pub data: Vec<HexBytes>,
 	pub gas_limit: Vec<U256>,
-	pub gas_price: U256,
+	pub gas_price: Option<U256>,
+	pub max_fee_per_gas: Option<U256>,
+	pub max_priority_fee_per_gas: Option<U256>,
 	pub nonce: U256,
 	pub secret_key: H256,
 	pub sender: H160,