diff --git a/ethcore/src/json_tests/executive.rs b/ethcore/src/json_tests/executive.rs
index 63638dfb3..dbb9bb6ab 100644
--- a/ethcore/src/json_tests/executive.rs
+++ b/ethcore/src/json_tests/executive.rs
@@ -239,7 +239,7 @@ fn do_json_test_for(vm: &VMType, json_data: &[u8]) -> Vec<String> {
 				0,
 				OriginInfo::from(&params),
 				&mut substate,
-				OutputPolicy::Return(&mut BytesRef::Flexible(&mut output), None),
+				OutputPolicy::Return(BytesRef::Flexible(&mut output), None),
 				params.address.clone()
 			);
 			let evm = engine.vm_factory().create();