diff --git a/src/state.rs b/src/state.rs
index 3a4ad1833..648caa20a 100644
--- a/src/state.rs
+++ b/src/state.rs
@@ -140,9 +140,9 @@ impl State {
 	/// This will change the state accordingly.
 	pub fn apply(&mut self, env_info: &EnvInfo, engine: &Engine, t: &Transaction) -> ApplyResult {
 		let e = try!(Executive::new(self, env_info, engine).transact(t));
-		println!("Executed: {:?}", e);
+		//println!("Executed: {:?}", e);
 		self.commit();
-		Ok(Receipt::new(self.root().clone(), e.gas_used, e.logs))
+		Ok(Receipt::new(self.root().clone(), e.cumulative_gas_used, e.logs))
 	}
 
 	pub fn revert(&mut self, backup: State) {
@@ -156,7 +156,7 @@ impl State {
 
 	/// Commit accounts to SecTrieDBMut. This is similar to cpp-ethereum's dev::eth::commit.
 	/// `accounts` is mutable because we may need to commit the code or storage and record that.
-	pub fn commit_into(db: &mut HashDB, mut root: H256, accounts: &mut HashMap<Address, Option<Account>>) -> H256 {
+	pub fn commit_into(db: &mut HashDB, root: &mut H256, accounts: &mut HashMap<Address, Option<Account>>) {
 		// first, commit the sub trees.
 		// TODO: is this necessary or can we dispense with the `ref mut a` for just `a`?
 		for (_, ref mut a) in accounts.iter_mut() {
@@ -170,7 +170,7 @@ impl State {
 		}
 
 		{
-			let mut trie = SecTrieDBMut::from_existing(db, &mut root);
+			let mut trie = SecTrieDBMut::from_existing(db, root);
 			for (address, ref a) in accounts.iter() {
 				match a {
 					&&Some(ref account) => trie.insert(address, &account.rlp()),
@@ -178,13 +178,11 @@ impl State {
 				}
 			}
 		}
-		root
 	}
 
 	/// Commits our cached account changes into the trie.
 	pub fn commit(&mut self) {
-		let r = self.root.clone();	// would prefer not to do this, really. 
-		self.root = Self::commit_into(&mut self.db, r, self.cache.borrow_mut().deref_mut());
+		Self::commit_into(&mut self.db, &mut self.root, self.cache.borrow_mut().deref_mut());
 	}
 
 	/// Populate the state from `accounts`.
diff --git a/src/tests/state.rs b/src/tests/state.rs
index 8aeb20560..fdedd7a83 100644
--- a/src/tests/state.rs
+++ b/src/tests/state.rs
@@ -4,54 +4,72 @@ use pod_state::*;
 use state_diff::*;
 use ethereum;
 
+fn flush(s: String) {
+	::std::io::stdout().write(s.as_bytes()).unwrap();
+	::std::io::stdout().flush().unwrap();
+}
+
 fn do_json_test(json_data: &[u8]) -> Vec<String> {
 	let json = Json::from_str(::std::str::from_utf8(json_data).unwrap()).expect("Json is invalid");
 	let mut failed = Vec::new();
 
 	let engine = ethereum::new_frontier_test().to_engine().unwrap();
 
+	flush(format!("\n"));
+
 	for (name, test) in json.as_object().unwrap() {
-		println!("name: {:?}", name);
 		let mut fail = false;
-		let mut fail_unless = |cond: bool| if !cond && !fail { failed.push(name.to_string()); fail = true; true } else {false};
-
-		let t = Transaction::from_json(&test["transaction"]);
-		let env = EnvInfo::from_json(&test["env"]);
-		let _out = Bytes::from_json(&test["out"]);
-		let post_state_root = xjson!(&test["postStateRoot"]);
-		let pre = PodState::from_json(&test["pre"]);
-		let post = PodState::from_json(&test["post"]);
-		let logs: Vec<_> = test["logs"].as_array().unwrap().iter().map(&LogEntry::from_json).collect();
-
-		//println!("Transaction: {:?}", t);
-		//println!("Env: {:?}", env);
-
 		{
-			let mut s = State::new_temp();
-			s.populate_from(post.clone());
-			s.commit();
-			assert_eq!(&post_state_root, s.root());
-		}
+			let mut fail_unless = |cond: bool| if !cond && !fail {
+				failed.push(name.to_string());
+				flush(format!("FAIL\n"));
+				fail = true;
+				true
+			} else {false};
 
-		let mut s = State::new_temp();
-		s.populate_from(pre);
-		s.commit();
-		let res = s.apply(&env, engine.deref(), &t);
+			flush(format!("   - {}...", name));
 
-		if fail_unless(s.root() == &post_state_root) {
-			println!("!!! {}: State mismatch (got: {}, expect: {}):", name, s.root(), post_state_root);
-			let our_post = s.to_pod();
-			println!("Got:\n{}", our_post);
-			println!("Expect:\n{}", post);
-			println!("Diff ---expect -> +++got:\n{}", StateDiff::diff_pod(&post, &our_post));
-		}
+			let t = Transaction::from_json(&test["transaction"]);
+			let env = EnvInfo::from_json(&test["env"]);
+			let _out = Bytes::from_json(&test["out"]);
+			let post_state_root = xjson!(&test["postStateRoot"]);
+			let pre = PodState::from_json(&test["pre"]);
+			let post = PodState::from_json(&test["post"]);
+			let logs: Vec<_> = test["logs"].as_array().unwrap().iter().map(&LogEntry::from_json).collect();
 
-		if let Ok(r) = res {
-			if fail_unless(logs == r.logs) {
-				println!("!!! {}: Logs mismatch:", name);
-				println!("Got:\n{:?}", r.logs);
-				println!("Expect:\n{:?}", logs);
+			//println!("Transaction: {:?}", t);
+			//println!("Env: {:?}", env);
+
+			{
+				let mut s = State::new_temp();
+				s.populate_from(post.clone());
+				s.commit();
+				assert_eq!(&post_state_root, s.root());
 			}
+
+			let mut s = State::new_temp();
+			s.populate_from(pre);
+			s.commit();
+			let res = s.apply(&env, engine.deref(), &t);
+
+			if fail_unless(s.root() == &post_state_root) {
+				println!("!!! {}: State mismatch (got: {}, expect: {}):", name, s.root(), post_state_root);
+				let our_post = s.to_pod();
+				println!("Got:\n{}", our_post);
+				println!("Expect:\n{}", post);
+				println!("Diff ---expect -> +++got:\n{}", StateDiff::diff_pod(&post, &our_post));
+			}
+
+			if let Ok(r) = res {
+				if fail_unless(logs == r.logs) {
+					println!("!!! {}: Logs mismatch:", name);
+					println!("Got:\n{:?}", r.logs);
+					println!("Expect:\n{:?}", logs);
+				}
+			}
+		}
+		if !fail {
+			flush(format!("ok\n"));
 		}
 		// TODO: Add extra APIs for output
 		//if fail_unless(out == r.)