diff --git a/src/evm/jit.rs b/src/evm/jit.rs
index 3fb3bb40c..fb71f3363 100644
--- a/src/evm/jit.rs
+++ b/src/evm/jit.rs
@@ -356,3 +356,36 @@ impl evm::Evm for JitEvm {
 	}
 }
 
+#[test]
+fn test_to_and_from_u256() {
+	let u = U256::from_str("d4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3").unwrap();
+	let j = u.into_jit();
+	let u2 = U256::from_jit(&j);
+	assert_eq!(u, u2);
+}
+
+#[test]
+fn test_to_and_from_h256() {
+	let h = H256::from_str("d4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3").unwrap();
+	let j: ::evmjit::I256 = h.clone().into_jit();
+	let h2 = H256::from_jit(&j);
+	
+	assert_eq!(h, h2);
+
+	let j: ::evmjit::H256 = h.clone().into_jit();
+	let h2 = H256::from_jit(&j);
+	assert_eq!(h, h2);
+}
+
+#[test]
+fn test_to_and_from_address() {
+	let a = Address::from_str("2adc25665018aa1fe0e6bc666dac8fc2697ff9ba").unwrap();
+	let j: ::evmjit::I256 = a.clone().into_jit();
+	let a2 = Address::from_jit(&j);
+
+	assert_eq!(a, a2);
+
+	let j: ::evmjit::H256 = a.clone().into_jit();
+	let a2 = Address::from_jit(&j);
+	assert_eq!(a, a2);
+}
diff --git a/src/evm/tests.rs b/src/evm/tests.rs
index 7ee64e4cc..e3f81dd93 100644
--- a/src/evm/tests.rs
+++ b/src/evm/tests.rs
@@ -13,11 +13,11 @@ struct FakeLogEntry {
 #[derive(Default)]
 struct FakeExt {
 	store: HashMap<H256, H256>,
-	balances: HashMap<Address, U256>,
+	_balances: HashMap<Address, U256>,
 	blockhashes: HashMap<U256, H256>,
 	codes: HashMap<Address, Bytes>,
 	logs: Vec<FakeLogEntry>,
-	suicide: HashSet<Address>,
+	_suicides: HashSet<Address>,
 	info: EnvInfo
 }
 
diff --git a/src/executive.rs b/src/executive.rs
index 81788c78d..da0948d9e 100644
--- a/src/executive.rs
+++ b/src/executive.rs
@@ -45,7 +45,7 @@ pub struct Executed {
 	pub refunded: U256,
 	/// Cumulative gas used in current block so far.
 	/// 
-	/// cumulative_gas_used = gas_used(t0) + gas_used(t1) + ... gas_used(tn)
+	/// `cumulative_gas_used = gas_used(t0) + gas_used(t1) + ... gas_used(tn)`
 	///
 	/// where `tn` is current transaction.
 	pub cumulative_gas_used: U256,