diff --git a/polkadot/executor/src/lib.rs b/polkadot/executor/src/lib.rs
index a7cef0c3cb..f7ded05025 100644
--- a/polkadot/executor/src/lib.rs
+++ b/polkadot/executor/src/lib.rs
@@ -73,9 +73,9 @@ mod tests {
 	#[test]
 	fn panic_execution_with_foreign_code_gives_error() {
 		let one = Keyring::One.to_raw_public();
-		let mut t = TestExternalities { storage: map![
+		let mut t: TestExternalities = map![
 			twox_128(&one.to_keyed_vec(b"sta:bal:")).to_vec() => vec![68u8, 0, 0, 0, 0, 0, 0, 0]
-		], };
+		];
 
 		let r = Executor::new().call(&mut t, BLOATY_CODE, "execute_transaction", &vec![].and(&Header::from_block_number(1u64)).and(&tx()));
 		assert!(r.is_err());
@@ -84,9 +84,9 @@ mod tests {
 	#[test]
 	fn panic_execution_with_native_equivalent_code_gives_error() {
 		let one = Keyring::One.to_raw_public();
-		let mut t = TestExternalities { storage: map![
+		let mut t: TestExternalities = map![
 			twox_128(&one.to_keyed_vec(b"sta:bal:")).to_vec() => vec![68u8, 0, 0, 0, 0, 0, 0, 0]
-		], };
+		];
 
 		let r = Executor::new().call(&mut t, COMPACT_CODE, "execute_transaction", &vec![].and(&Header::from_block_number(1u64)).and(&tx()));
 		assert!(r.is_err());
@@ -97,9 +97,9 @@ mod tests {
 		let one = Keyring::One.to_raw_public();
 		let two = Keyring::Two.to_raw_public();
 
-		let mut t = TestExternalities { storage: map![
+		let mut t: TestExternalities = map![
 			twox_128(&one.to_keyed_vec(b"sta:bal:")).to_vec() => vec![111u8, 0, 0, 0, 0, 0, 0, 0]
-		], };
+		];
 
 		let r = Executor::new().call(&mut t, COMPACT_CODE, "execute_transaction", &vec![].and(&Header::from_block_number(1u64)).and(&tx()));
 		assert!(r.is_ok());
@@ -115,9 +115,9 @@ mod tests {
 		let one = Keyring::One.to_raw_public();
 		let two = Keyring::Two.to_raw_public();
 
-		let mut t = TestExternalities { storage: map![
+		let mut t: TestExternalities = map![
 			twox_128(&one.to_keyed_vec(b"sta:bal:")).to_vec() => vec![111u8, 0, 0, 0, 0, 0, 0, 0]
-		], };
+		];
 
 		let r = Executor::new().call(&mut t, BLOATY_CODE, "execute_transaction", &vec![].and(&Header::from_block_number(1u64)).and(&tx()));
 		assert!(r.is_ok());
@@ -133,7 +133,7 @@ mod tests {
 		let two = Keyring::Two.to_raw_public();
 		let three = [3u8; 32];
 
-		TestExternalities { storage: map![
+		map![
 			twox_128(&0u64.to_keyed_vec(b"sys:old:")).to_vec() => [69u8; 32].encode(),
 			twox_128(b"gov:apr").to_vec() => vec![].and(&667u32),
 			twox_128(b"ses:len").to_vec() => vec![].and(&2u64),
@@ -149,7 +149,7 @@ mod tests {
 			twox_128(b"sta:vac").to_vec() => vec![].and(&3u64),
 			twox_128(b"sta:era").to_vec() => vec![].and(&0u64),
 			twox_128(&one.to_keyed_vec(b"sta:bal:")).to_vec() => vec![111u8, 0, 0, 0, 0, 0, 0, 0]
-		], }
+		]
 	}
 
 	fn construct_block(number: BlockNumber, parent_hash: Hash, state_root: Hash, txs: Vec<Transaction>) -> (Vec<u8>, Hash) {
@@ -250,9 +250,9 @@ mod tests {
 	#[test]
 	fn panic_execution_gives_error() {
 		let one = Keyring::One.to_raw_public();
-		let mut t = TestExternalities { storage: map![
+		let mut t: TestExternalities = map![
 			twox_128(&one.to_keyed_vec(b"sta:bal:")).to_vec() => vec![68u8, 0, 0, 0, 0, 0, 0, 0]
-		], };
+		];
 
 		let foreign_code = include_bytes!("../../runtime/wasm/target/wasm32-unknown-unknown/release/polkadot_runtime.wasm");
 		let r = WasmExecutor.call(&mut t, &foreign_code[..], "execute_transaction", &vec![].and(&Header::from_block_number(1u64)).and(&tx()));
@@ -264,9 +264,9 @@ mod tests {
 		let one = Keyring::One.to_raw_public();
 		let two = Keyring::Two.to_raw_public();
 
-		let mut t = TestExternalities { storage: map![
+		let mut t: TestExternalities = map![
 			twox_128(&one.to_keyed_vec(b"sta:bal:")).to_vec() => vec![111u8, 0, 0, 0, 0, 0, 0, 0]
-		], };
+		];
 
 		let foreign_code = include_bytes!("../../runtime/wasm/target/wasm32-unknown-unknown/release/polkadot_runtime.compact.wasm");
 		let r = WasmExecutor.call(&mut t, &foreign_code[..], "execute_transaction", &vec![].and(&Header::from_block_number(1u64)).and(&tx()));
diff --git a/polkadot/runtime/src/runtime/governance.rs b/polkadot/runtime/src/runtime/governance.rs
index b8733b9776..9138a3eddf 100644
--- a/polkadot/runtime/src/runtime/governance.rs
+++ b/polkadot/runtime/src/runtime/governance.rs
@@ -157,7 +157,7 @@ mod tests {
 		let two = Keyring::Two.to_raw_public();
 		let three = [3u8; 32];
 
-		TestExternalities { storage: map![
+		map![
 			twox_128(APPROVALS_REQUIRED).to_vec() => vec![].and(&667u32),
 			twox_128(b"ses:len").to_vec() => vec![].and(&1u64),
 			twox_128(b"ses:val:len").to_vec() => vec![].and(&3u32),
@@ -171,7 +171,7 @@ mod tests {
 			twox_128(b"sta:spe").to_vec() => vec![].and(&1u64),
 			twox_128(b"sta:vac").to_vec() => vec![].and(&3u64),
 			twox_128(b"sta:era").to_vec() => vec![].and(&1u64)
-		], }
+		]
 	}
 
 	#[test]
diff --git a/polkadot/runtime/src/runtime/parachains.rs b/polkadot/runtime/src/runtime/parachains.rs
index dd7485ddc8..1cd4151cf9 100644
--- a/polkadot/runtime/src/runtime/parachains.rs
+++ b/polkadot/runtime/src/runtime/parachains.rs
@@ -83,10 +83,10 @@ mod tests {
 	use runtime::{consensus, session};
 
 	fn simple_setup() -> TestExternalities {
-		TestExternalities { storage: map![
+		map![
 			twox_128(b"ses:val:len").to_vec() => vec![].and(&8u32),
 			twox_128(b"par:cou").to_vec() => vec![].and(&2u32)
-		], }
+		]
 	}
 
 	#[test]
diff --git a/polkadot/runtime/src/runtime/session.rs b/polkadot/runtime/src/runtime/session.rs
index a3a43d88cc..e9bf5f3765 100644
--- a/polkadot/runtime/src/runtime/session.rs
+++ b/polkadot/runtime/src/runtime/session.rs
@@ -145,7 +145,7 @@ mod tests {
 	use runtime::{consensus, session};
 
 	fn simple_setup() -> TestExternalities {
-		TestExternalities { storage: map![
+		map![
 			twox_128(SESSION_LENGTH).to_vec() => vec![].and(&2u64),
 			// the validators (10, 20, ...)
 			twox_128(b"ses:val:len").to_vec() => vec![].and(&2u32),
@@ -155,7 +155,7 @@ mod tests {
 			b":auth:len".to_vec() => vec![].and(&2u32),
 			0u32.to_keyed_vec(b":auth:") => vec![11; 32],
 			1u32.to_keyed_vec(b":auth:") => vec![21; 32]
-		], }
+		]
 	}
 
 	#[test]
diff --git a/polkadot/runtime/src/runtime/staking.rs b/polkadot/runtime/src/runtime/staking.rs
index a66d43eeb9..0bb4372c6d 100644
--- a/polkadot/runtime/src/runtime/staking.rs
+++ b/polkadot/runtime/src/runtime/staking.rs
@@ -227,7 +227,7 @@ mod tests {
 		let three = [3u8; 32];
 		let four = [4u8; 32];
 
-		let mut t = TestExternalities { storage: map![
+		let mut t: TestExternalities = map![
 			twox_128(b"ses:len").to_vec() => vec![].and(&1u64),
 			twox_128(b"ses:val:len").to_vec() => vec![].and(&2u32),
 			twox_128(&0u32.to_keyed_vec(b"ses:val:")).to_vec() => vec![10; 32],
@@ -239,7 +239,7 @@ mod tests {
 			twox_128(&two.to_keyed_vec(BALANCE_OF)).to_vec() => vec![].and(&20u64),
 			twox_128(&three.to_keyed_vec(BALANCE_OF)).to_vec() => vec![].and(&30u64),
 			twox_128(&four.to_keyed_vec(BALANCE_OF)).to_vec() => vec![].and(&40u64)
-		], };
+		];
 
 		with_externalities(&mut t, || {
 			assert_eq!(era_length(), 2u64);
@@ -296,10 +296,10 @@ mod tests {
 
 	#[test]
 	fn staking_eras_work() {
-		let mut t = TestExternalities { storage: map![
+		let mut t: TestExternalities = map![
 			twox_128(b"ses:len").to_vec() => vec![].and(&1u64),
 			twox_128(SESSIONS_PER_ERA).to_vec() => vec![].and(&2u64)
-		], };
+		];
 		with_externalities(&mut t, || {
 			assert_eq!(era_length(), 2u64);
 			assert_eq!(sessions_per_era(), 2u64);
@@ -363,9 +363,9 @@ mod tests {
 		let one = Keyring::One.to_raw_public();
 		let two = Keyring::Two.to_raw_public();
 
-		let mut t = TestExternalities { storage: map![
+		let mut t: TestExternalities = map![
 			twox_128(&one.to_keyed_vec(BALANCE_OF)).to_vec() => vec![].and(&42u64)
-		], };
+		];
 
 		with_externalities(&mut t, || {
 			assert_eq!(balance(&one), 42);
@@ -378,9 +378,9 @@ mod tests {
 		let one = Keyring::One.to_raw_public();
 		let two = Keyring::Two.to_raw_public();
 
-		let mut t = TestExternalities { storage: map![
+		let mut t: TestExternalities = map![
 			twox_128(&one.to_keyed_vec(BALANCE_OF)).to_vec() => vec![].and(&111u64)
-		], };
+		];
 
 		with_externalities(&mut t, || {
 			transfer(&one, &two, 69);
@@ -395,9 +395,9 @@ mod tests {
 		let one = Keyring::One.to_raw_public();
 		let two = Keyring::Two.to_raw_public();
 
-		let mut t = TestExternalities { storage: map![
+		let mut t: TestExternalities = map![
 			twox_128(&one.to_keyed_vec(BALANCE_OF)).to_vec() => vec![].and(&111u64)
-		], };
+		];
 
 		with_externalities(&mut t, || {
 			stake(&one);
diff --git a/polkadot/runtime/src/runtime/system.rs b/polkadot/runtime/src/runtime/system.rs
index 2f8f5c25c7..7d5e8835ed 100644
--- a/polkadot/runtime/src/runtime/system.rs
+++ b/polkadot/runtime/src/runtime/system.rs
@@ -247,9 +247,9 @@ mod tests {
 		let one = Keyring::One.to_raw_public();
 		let two = Keyring::Two.to_raw_public();
 
-		let mut t = TestExternalities { storage: map![
+		let mut t: TestExternalities = map![
 			twox_128(&one.to_keyed_vec(b"sta:bal:")).to_vec() => vec![111u8, 0, 0, 0, 0, 0, 0, 0]
-		], };
+		];
 
 		let tx = UncheckedTransaction {
 			transaction: Transaction {
@@ -272,7 +272,7 @@ mod tests {
 		let two = Keyring::Two.to_raw_public();
 		let three = [3u8; 32];
 
-		TestExternalities { storage: map![
+		map![
 			twox_128(&0u64.to_keyed_vec(b"sys:old:")).to_vec() => [69u8; 32].encode(),
 			twox_128(b"gov:apr").to_vec() => vec![].and(&667u32),
 			twox_128(b"ses:len").to_vec() => vec![].and(&2u64),
@@ -288,7 +288,7 @@ mod tests {
 			twox_128(b"sta:vac").to_vec() => vec![].and(&3u64),
 			twox_128(b"sta:era").to_vec() => vec![].and(&0u64),
 			twox_128(&one.to_keyed_vec(b"sta:bal:")).to_vec() => vec![111u8, 0, 0, 0, 0, 0, 0, 0]
-		], }
+		]
 	}
 
 	#[test]
diff --git a/polkadot/runtime/src/runtime/timestamp.rs b/polkadot/runtime/src/runtime/timestamp.rs
index c64a511ad0..0b96f39bd4 100644
--- a/polkadot/runtime/src/runtime/timestamp.rs
+++ b/polkadot/runtime/src/runtime/timestamp.rs
@@ -47,9 +47,9 @@ mod tests {
 
 	#[test]
 	fn timestamp_works() {
-		let mut t = TestExternalities { storage: map![
+		let mut t: TestExternalities = map![
 			twox_128(CURRENT_TIMESTAMP).to_vec() => vec![].and(&42u64)
-		], };
+		];
 
 		with_externalities(&mut t, || {
 			assert_eq!(get(), 42);
diff --git a/polkadot/runtime/wasm/genesis.wasm b/polkadot/runtime/wasm/genesis.wasm
index 91c7b47574..bc0cb89235 100644
Binary files a/polkadot/runtime/wasm/genesis.wasm and b/polkadot/runtime/wasm/genesis.wasm differ
diff --git a/polkadot/runtime/wasm/target/wasm32-unknown-unknown/release/polkadot_runtime.compact.wasm b/polkadot/runtime/wasm/target/wasm32-unknown-unknown/release/polkadot_runtime.compact.wasm
index 84e52dbc50..a1f28badf2 100644
Binary files a/polkadot/runtime/wasm/target/wasm32-unknown-unknown/release/polkadot_runtime.compact.wasm and b/polkadot/runtime/wasm/target/wasm32-unknown-unknown/release/polkadot_runtime.compact.wasm differ
diff --git a/polkadot/runtime/wasm/target/wasm32-unknown-unknown/release/polkadot_runtime.wasm b/polkadot/runtime/wasm/target/wasm32-unknown-unknown/release/polkadot_runtime.wasm
index a92614dcc2..160550b5c7 100644
Binary files a/polkadot/runtime/wasm/target/wasm32-unknown-unknown/release/polkadot_runtime.wasm and b/polkadot/runtime/wasm/target/wasm32-unknown-unknown/release/polkadot_runtime.wasm differ