diff --git a/ethcore/src/evm/ext.rs b/ethcore/src/evm/ext.rs
index f4172f10a..4986b12c8 100644
--- a/ethcore/src/evm/ext.rs
+++ b/ethcore/src/evm/ext.rs
@@ -67,6 +67,7 @@ pub trait Ext {
 	/// Returns Err, if we run out of gas.
 	/// Otherwise returns call_result which contains gas left
 	/// and true if subcall was successfull.
+	#[cfg_attr(feature="dev", allow(too_many_arguments))]
 	fn call(&mut self,
 			gas: &U256,
 			sender_address: &Address,
diff --git a/ethcore/src/evm/interpreter.rs b/ethcore/src/evm/interpreter.rs
index 7491321cb..b29fc0d41 100644
--- a/ethcore/src/evm/interpreter.rs
+++ b/ethcore/src/evm/interpreter.rs
@@ -521,6 +521,7 @@ impl Interpreter {
 		Ok(overflowing!(offset.overflowing_add(size.clone())))
 	}
 
+	#[cfg_attr(feature="dev", allow(too_many_arguments))]
 	fn exec_instruction(&self,
 						gas: Gas,
 						params: &ActionParams,
diff --git a/parity/main.rs b/parity/main.rs
index b8cc2a0f0..c7e534993 100644
--- a/parity/main.rs
+++ b/parity/main.rs
@@ -370,7 +370,7 @@ impl Configuration {
 
 	fn init_nodes(&self, spec: &Spec) -> Vec<String> {
 		match self.args.flag_bootnodes {
-			Some(ref x) if x.len() > 0 => x.split(',').map(|s| {
+			Some(ref x) if !x.is_empty() => x.split(',').map(|s| {
 				Self::normalize_enode(s).unwrap_or_else(|| {
 					die!("{}: Invalid node address format given for a boot node.", s)
 				})
@@ -409,6 +409,7 @@ impl Configuration {
 		ret
 	}
 
+	#[cfg_attr(feature="dev", allow(useless_format))]
 	fn client_config(&self) -> ClientConfig {
 		let mut client_config = ClientConfig::default();
 		match self.args.flag_cache {
diff --git a/util/src/journaldb/archivedb.rs b/util/src/journaldb/archivedb.rs
index 83a80b7c2..76f0ecc50 100644
--- a/util/src/journaldb/archivedb.rs
+++ b/util/src/journaldb/archivedb.rs
@@ -175,6 +175,8 @@ impl JournalDB for ArchiveDB {
 
 #[cfg(test)]
 mod tests {
+	#![cfg_attr(feature="dev", allow(blacklisted_name))]
+
 	use common::*;
 	use super::*;
 	use hashdb::*;
@@ -371,7 +373,7 @@ mod tests {
 			jdb.commit(5, &b"5".sha3(), Some((4, b"4".sha3()))).unwrap();
 		}
 	}
-	
+
 	#[test]
 	fn reopen_fork() {
 		let mut dir = ::std::env::temp_dir();
diff --git a/util/src/journaldb/earlymergedb.rs b/util/src/journaldb/earlymergedb.rs
index 7cb00b993..15dcacd6a 100644
--- a/util/src/journaldb/earlymergedb.rs
+++ b/util/src/journaldb/earlymergedb.rs
@@ -527,6 +527,8 @@ impl JournalDB for EarlyMergeDB {
 
 #[cfg(test)]
 mod tests {
+	#![cfg_attr(feature="dev", allow(blacklisted_name))]
+
 	use common::*;
 	use super::*;
 	use super::super::traits::JournalDB;
diff --git a/util/src/journaldb/overlayrecentdb.rs b/util/src/journaldb/overlayrecentdb.rs
index efbd26c3b..102e23407 100644
--- a/util/src/journaldb/overlayrecentdb.rs
+++ b/util/src/journaldb/overlayrecentdb.rs
@@ -358,6 +358,8 @@ impl HashDB for OverlayRecentDB {
 
 #[cfg(test)]
 mod tests {
+	#![cfg_attr(feature="dev", allow(blacklisted_name))]
+
 	use common::*;
 	use super::*;
 	use hashdb::*;
diff --git a/util/src/journaldb/refcounteddb.rs b/util/src/journaldb/refcounteddb.rs
index 590964247..a8c3ff12b 100644
--- a/util/src/journaldb/refcounteddb.rs
+++ b/util/src/journaldb/refcounteddb.rs
@@ -28,7 +28,7 @@ use std::env;
 /// Implementation of the HashDB trait for a disk-backed database with a memory overlay
 /// and latent-removal semantics.
 ///
-/// Like OverlayDB, there is a memory overlay; `commit()` must be called in order to 
+/// Like OverlayDB, there is a memory overlay; `commit()` must be called in order to
 /// write operations out to disk. Unlike OverlayDB, `remove()` operations do not take effect
 /// immediately. Rather some age (based on a linear but arbitrary metric) must pass before
 /// the removals actually take effect.
@@ -113,7 +113,7 @@ impl JournalDB for RefCountedDB {
 	}
 
 	fn commit(&mut self, now: u64, id: &H256, end: Option<(u64, H256)>) -> Result<u32, UtilError> {
-		// journal format: 
+		// journal format:
 		// [era, 0] => [ id, [insert_0, ...], [remove_0, ...] ]
 		// [era, 1] => [ id, [insert_0, ...], [remove_0, ...] ]
 		// [era, n] => [ ... ]
@@ -121,7 +121,7 @@ impl JournalDB for RefCountedDB {
 		// TODO: store last_era, reclaim_period.
 
 		// when we make a new commit, we journal the inserts and removes.
-		// for each end_era that we journaled that we are no passing by, 
+		// for each end_era that we journaled that we are no passing by,
 		// we remove all of its removes assuming it is canonical and all
 		// of its inserts otherwise.
 
@@ -147,7 +147,7 @@ impl JournalDB for RefCountedDB {
 			r.append(&self.inserts);
 			r.append(&self.removes);
 			try!(batch.put(&last, r.as_raw()));
-			
+
 			trace!(target: "rcdb", "new journal for time #{}.{} => {}: inserts={:?}, removes={:?}", now, index, id, self.inserts, self.removes);
 
 			self.inserts.clear();
@@ -194,6 +194,8 @@ impl JournalDB for RefCountedDB {
 
 #[cfg(test)]
 mod tests {
+	#![cfg_attr(feature="dev", allow(blacklisted_name))]
+
 	use common::*;
 	use super::*;
 	use super::super::traits::JournalDB;
diff --git a/util/src/misc.rs b/util/src/misc.rs
index 76accf93b..159381603 100644
--- a/util/src/misc.rs
+++ b/util/src/misc.rs
@@ -88,7 +88,7 @@ pub fn version_data() -> Bytes {
 		u32::from_str(env!("CARGO_PKG_VERSION_PATCH")).unwrap();
 	s.append(&v);
 	s.append(&"Parity");
-	s.append(&format!("{}", rustc_version()));
+	s.append(&rustc_version());
 	s.append(&&Target::os()[0..2]);
 	s.out()
 }
diff --git a/util/src/network/ip_utils.rs b/util/src/network/ip_utils.rs
index 9696c601d..b37a47064 100644
--- a/util/src/network/ip_utils.rs
+++ b/util/src/network/ip_utils.rs
@@ -42,7 +42,7 @@ impl SocketAddrExt for Ipv4Addr {
 
 	fn is_global_s(&self) -> bool {
 		!self.is_private() && !self.is_loopback() && !self.is_link_local() &&
-			!self.is_broadcast() && !self.is_documentation() 
+			!self.is_broadcast() && !self.is_documentation()
 	}
 }
 
@@ -216,6 +216,8 @@ fn can_map_external_address_or_fail() {
 
 #[test]
 fn ipv4_properties() {
+
+	#![cfg_attr(feature="dev", allow(too_many_arguments))]
 	fn check(octets: &[u8; 4], unspec: bool, loopback: bool,
 			 private: bool, link_local: bool, global: bool,
 			 multicast: bool, broadcast: bool, documentation: bool) {
@@ -262,7 +264,7 @@ fn ipv6_properties() {
 		assert_eq!(ip.is_global_s(), global);
 	}
 
-	//    unspec loopbk global 
+	//    unspec loopbk global
 	check("::", true,  false, true);
 	check("::1", false, true, false);
 }