diff --git a/src/client.rs b/src/client.rs
index 91ccf4b95..59568584b 100644
--- a/src/client.rs
+++ b/src/client.rs
@@ -145,7 +145,6 @@ impl Client {
 	/// Create a new client with given spec and DB path.
 	pub fn new(spec: Spec, path: &Path, message_channel: IoChannel<NetSyncMessage> ) -> Result<Arc<Client>, Error> {
 		let gb = spec.genesis_block();
-		flushln!("Spec says genesis block is {}", gb.pretty());
 		let chain = Arc::new(RwLock::new(BlockChain::new(&gb, path)));
 		let mut opts = Options::new();
 		opts.set_max_open_files(256);
@@ -177,7 +176,7 @@ impl Client {
 		if engine.spec().ensure_db_good(&mut state_db) {
 			state_db.commit(0, &engine.spec().genesis_header().hash(), None).expect("Error commiting genesis state to state DB");
 		}
-		flushln!("Client::new: commiting. Best root now: {}. contains: {}", chain.read().unwrap().genesis_header().state_root, state_db.contains(&chain.read().unwrap().genesis_header().state_root));
+		trace!("Client::new: commiting. Best root now: {}. contains: {}", chain.read().unwrap().genesis_header().state_root, state_db.contains(&chain.read().unwrap().genesis_header().state_root));
 		Ok(Arc::new(Client {
 			chain: chain,
 			engine: engine.clone(),
diff --git a/src/evm/interpreter.rs b/src/evm/interpreter.rs
index 2f43b5199..7657b1bbe 100644
--- a/src/evm/interpreter.rs
+++ b/src/evm/interpreter.rs
@@ -275,8 +275,6 @@ impl evm::Evm for Interpreter {
 			code: &code
 		};
 
-		flushln!("Executing: {:?}", params);
-
 		while reader.position < code.len() {
 			let instruction = code[reader.position];
 			reader.position += 1;
@@ -642,7 +640,6 @@ impl Interpreter {
 				return Ok(InstructionResult::StopExecution);
 			},
 			instructions::SUICIDE => {
-				flushln!("SUICIDE!");
 				let address = stack.pop_back();
 				ext.suicide(&u256_to_address(&address));
 				return Ok(InstructionResult::StopExecution);
diff --git a/src/executive.rs b/src/executive.rs
index 9c3a669cf..07ab4c4c5 100644
--- a/src/executive.rs
+++ b/src/executive.rs
@@ -173,7 +173,7 @@ impl<'a> Executive<'a> {
 		if let ActionValue::Transfer(val) = params.value {
 			self.state.transfer_balance(&params.sender, &params.address, &val);
 		}
-		flushln!("Executive::call(params={:?}) self.env_info={:?}", params, self.info);
+		trace!("Executive::call(params={:?}) self.env_info={:?}", params, self.info);
 
 		if self.engine.is_builtin(&params.code_address) {
 			// if destination is builtin, try to execute it
@@ -260,17 +260,16 @@ impl<'a> Executive<'a> {
 		let refund_value = gas_left * t.gas_price;
 		let fees_value = gas_used * t.gas_price;
 
-		flushln!("exec::finalize: t.gas={}, sstore_refunds={}, suicide_refunds={}, refunds_bound={}, gas_left_prerefund={}, refunded={}, gas_left={}, gas_used={}, refund_value={}, fees_value={}\n",
+		trace!("exec::finalize: t.gas={}, sstore_refunds={}, suicide_refunds={}, refunds_bound={}, gas_left_prerefund={}, refunded={}, gas_left={}, gas_used={}, refund_value={}, fees_value={}\n",
 			t.gas, sstore_refunds, suicide_refunds, refunds_bound, gas_left_prerefund, refunded, gas_left, gas_used, refund_value, fees_value);
 
-		flushln!("exec::finalize: Refunding refund_value={}, sender={}\n", refund_value, t.sender().unwrap());
+		trace!("exec::finalize: Refunding refund_value={}, sender={}\n", refund_value, t.sender().unwrap());
 		self.state.add_balance(&t.sender().unwrap(), &refund_value);
-		flushln!("exec::finalize: Compensating author: fees_value={}, author={}\n", fees_value, &self.info.author);
+		trace!("exec::finalize: Compensating author: fees_value={}, author={}\n", fees_value, &self.info.author);
 		self.state.add_balance(&self.info.author, &fees_value);
 
 		// perform suicides
 		for address in &substate.suicides {
-			flushln!("Killing {}", address);
 			self.state.kill_account(address);
 		}
 
diff --git a/src/externalities.rs b/src/externalities.rs
index e7a73d553..f1b8c1958 100644
--- a/src/externalities.rs
+++ b/src/externalities.rs
@@ -215,7 +215,7 @@ impl<'a> Ext for Externalities<'a> {
 	fn suicide(&mut self, refund_address: &Address) {
 		let address = self.origin_info.address.clone();
 		let balance = self.balance(&address);
-		flushln!("Suiciding {} -> {} (xfer: {})", address, refund_address, balance);
+		trace!("Suiciding {} -> {} (xfer: {})", address, refund_address, balance);
 		self.state.transfer_balance(&address, refund_address, &balance);
 		self.substate.suicides.insert(address);
 	}
diff --git a/src/state.rs b/src/state.rs
index 238638617..7310f63a7 100644
--- a/src/state.rs
+++ b/src/state.rs
@@ -103,7 +103,6 @@ impl State {
 
 	/// Mutate storage of account `a` so that it is `value` for `key`.
 	pub fn code(&self, a: &Address) -> Option<Bytes> {
-		flushln!("Getting code at {}", a);
 		self.get(a, true).as_ref().map_or(None, |a|a.code().map(|x|x.to_vec()))
 	}