diff --git a/ethcore/src/executive.rs b/ethcore/src/executive.rs
index 057c1e67a..d961b80c3 100644
--- a/ethcore/src/executive.rs
+++ b/ethcore/src/executive.rs
@@ -496,6 +496,7 @@ mod tests {
 	use tests::helpers::*;
 	use trace::trace;
 	use trace::{Trace, Tracer, NoopTracer, ExecutiveTracer};
+	use trace::{VMTrace, VMTracer, NoopVMTracer, ExecutiveVMTracer};
 
 	#[test]
 	fn test_contract_address() {
@@ -524,7 +525,7 @@ mod tests {
 
 		let gas_left = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			ex.create(params, &mut substate, &mut NoopTracer).unwrap()
+			ex.create(params, &mut substate, &mut NoopTracer, &mut NoopVMTracer).unwrap()
 		};
 
 		assert_eq!(gas_left, U256::from(79_975));
@@ -583,7 +584,7 @@ mod tests {
 
 		let gas_left = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			ex.create(params, &mut substate, &mut NoopTracer).unwrap()
+			ex.create(params, &mut substate, &mut NoopTracer, &mut NoopVMTracer).unwrap()
 		};
 
 		assert_eq!(gas_left, U256::from(62_976));
@@ -640,7 +641,7 @@ mod tests {
 		let gas_left = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
 			let output = BytesRef::Fixed(&mut[0u8;0]);
-			ex.call(params, &mut substate, output, &mut tracer).unwrap()
+			ex.call(params, &mut substate, output, &mut tracer, &mut NoopVMTracer).unwrap()
 		};
 
 		let expected_trace = vec![ Trace {
@@ -711,7 +712,7 @@ mod tests {
 
 		let gas_left = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			ex.create(params.clone(), &mut substate, &mut tracer).unwrap()
+			ex.create(params.clone(), &mut substate, &mut tracer, &mut NoopVMTracer).unwrap()
 		};
 
 		let expected_trace = vec![Trace {
@@ -780,7 +781,7 @@ mod tests {
 
 		let gas_left = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			ex.create(params, &mut substate, &mut NoopTracer).unwrap()
+			ex.create(params, &mut substate, &mut NoopTracer, &mut NoopVMTracer).unwrap()
 		};
 
 		assert_eq!(gas_left, U256::from(62_976));
@@ -832,7 +833,7 @@ mod tests {
 
 		{
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			ex.create(params, &mut substate, &mut NoopTracer).unwrap();
+			ex.create(params, &mut substate, &mut NoopTracer, &mut NoopVMTracer).unwrap();
 		}
 
 		assert_eq!(substate.contracts_created.len(), 1);
@@ -893,7 +894,7 @@ mod tests {
 
 		let gas_left = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			ex.call(params, &mut substate, BytesRef::Fixed(&mut []), &mut NoopTracer).unwrap()
+			ex.call(params, &mut substate, BytesRef::Fixed(&mut []), &mut NoopTracer, &mut NoopVMTracer).unwrap()
 		};
 
 		assert_eq!(gas_left, U256::from(73_237));
@@ -938,7 +939,7 @@ mod tests {
 
 		let gas_left = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			ex.call(params, &mut substate, BytesRef::Fixed(&mut []), &mut NoopTracer).unwrap()
+			ex.call(params, &mut substate, BytesRef::Fixed(&mut []), &mut NoopTracer, &mut NoopVMTracer).unwrap()
 		};
 
 		assert_eq!(gas_left, U256::from(59_870));
@@ -1140,7 +1141,7 @@ mod tests {
 
 		let result = {
 			let mut ex = Executive::new(&mut state, &info, &engine, &factory);
-			ex.create(params, &mut substate, &mut NoopTracer)
+			ex.create(params, &mut substate, &mut NoopTracer, &mut NoopVMTracer)
 		};
 
 		match result {
diff --git a/ethcore/src/externalities.rs b/ethcore/src/externalities.rs
index e7a5adb89..cd7564f70 100644
--- a/ethcore/src/externalities.rs
+++ b/ethcore/src/externalities.rs
@@ -303,7 +303,7 @@ mod tests {
 	use substate::*;
 	use tests::helpers::*;
 	use super::*;
-	use trace::{NoopTracer};
+	use trace::{NoopTracer, NoopVMTracer};
 
 	fn get_test_origin() -> OriginInfo {
 		OriginInfo {
@@ -355,9 +355,10 @@ mod tests {
 		let mut setup = TestSetup::new();
 		let state = setup.state.reference_mut();
 		let mut tracer = NoopTracer;
+		let mut vm_tracer = NoopVMTracer;
 
 		let vm_factory = Default::default();
-		let ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer);
+		let ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer, &mut vm_tracer);
 
 		assert_eq!(ext.env_info().number, 100);
 	}
@@ -367,9 +368,10 @@ mod tests {
 		let mut setup = TestSetup::new();
 		let state = setup.state.reference_mut();
 		let mut tracer = NoopTracer;
+		let mut vm_tracer = NoopVMTracer;
 
 		let vm_factory = Default::default();
-		let ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer);
+		let ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer, &mut vm_tracer);
 
 		let hash = ext.blockhash(&U256::from_str("0000000000000000000000000000000000000000000000000000000000120000").unwrap());
 
@@ -389,9 +391,10 @@ mod tests {
 		}
 		let state = setup.state.reference_mut();
 		let mut tracer = NoopTracer;
+		let mut vm_tracer = NoopVMTracer;
 
 		let vm_factory = Default::default();
-		let ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer);
+		let ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer, &mut vm_tracer);
 
 		let hash = ext.blockhash(&U256::from_str("0000000000000000000000000000000000000000000000000000000000120000").unwrap());
 
@@ -404,9 +407,10 @@ mod tests {
 		let mut setup = TestSetup::new();
 		let state = setup.state.reference_mut();
 		let mut tracer = NoopTracer;
+		let mut vm_tracer = NoopVMTracer;
 
 		let vm_factory = Default::default();
-		let mut ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer);
+		let mut ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer, &mut vm_tracer);
 
 		let mut output = vec![];
 
@@ -429,10 +433,11 @@ mod tests {
 		let mut setup = TestSetup::new();
 		let state = setup.state.reference_mut();
 		let mut tracer = NoopTracer;
+		let mut vm_tracer = NoopVMTracer;
 
 		{
 			let vm_factory = Default::default();
-			let mut ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer);
+			let mut ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer, &mut vm_tracer);
 			ext.log(log_topics, &log_data);
 		}
 
@@ -446,10 +451,11 @@ mod tests {
 		let mut setup = TestSetup::new();
 		let state = setup.state.reference_mut();
 		let mut tracer = NoopTracer;
+		let mut vm_tracer = NoopVMTracer;
 
 		{
 			let vm_factory = Default::default();
-			let mut ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer);
+			let mut ext = Externalities::new(state, &setup.env_info, &*setup.engine, &vm_factory, 0, get_test_origin(), &mut setup.sub_state, OutputPolicy::InitContract(None), &mut tracer, &mut vm_tracer);
 			ext.suicide(&refund_account);
 		}