diff --git a/ethcore/src/tests/helpers.rs b/ethcore/src/tests/helpers.rs
index 56ea6b1d3..dc3068560 100644
--- a/ethcore/src/tests/helpers.rs
+++ b/ethcore/src/tests/helpers.rs
@@ -252,7 +252,7 @@ pub fn generate_dummy_empty_blockchain() -> GuardedTempResult<BlockChain> {
 
 pub fn get_temp_journal_db() -> GuardedTempResult<Box<JournalDB>> {
 	let temp = RandomTempPath::new();
-	let journal_db: Box<JournalDB> = Box::new(OptionOneDB::new(temp.as_str()));
+	let journal_db = journaldb::new(temp.as_str(), journaldb::Algorithm::EarlyMerge);
 	GuardedTempResult {
 		_temp: temp,
 		result: Some(journal_db)
@@ -269,7 +269,7 @@ pub fn get_temp_state() -> GuardedTempResult<State> {
 }
 
 pub fn get_temp_journal_db_in(path: &Path) -> Box<JournalDB> {
-	Box::new(OptionOneDB::new(path.to_str().unwrap()))
+	journaldb::new(path.to_str().unwrap(), journaldb::Algorithm::EarlyMerge)
 }
 
 pub fn get_temp_state_in(path: &Path) -> State {