diff --git a/ethcore/src/state_db.rs b/ethcore/src/state_db.rs
index a5823f50b..de5a3f75b 100644
--- a/ethcore/src/state_db.rs
+++ b/ethcore/src/state_db.rs
@@ -477,7 +477,7 @@ mod tests {
 		let mut batch = DBTransaction::new();
 
 		// blocks  [ 3a(c) 2a(c) 2b 1b 1a(c) 0 ]
-	    // balance [ 5     5     4  3  2     2 ]
+		// balance [ 5     5     4  3  2     2 ]
 		let mut s = state_db.boxed_clone_canon(&root_parent);
 		s.add_to_account_cache(address, Some(Account::new_basic(2.into(), 0.into())), false);
 		s.journal_under(&mut batch, 0, &h0).unwrap();
diff --git a/ethstore/src/dir/vault.rs b/ethstore/src/dir/vault.rs
index 31c99fcc4..a7b351643 100755
--- a/ethstore/src/dir/vault.rs
+++ b/ethstore/src/dir/vault.rs
@@ -296,6 +296,7 @@ mod test {
 		assert!(check_vault_name("vault_with_underscores"));
 		assert!(check_vault_name("vault-with-dashes"));
 		assert!(check_vault_name("vault-with-digits-123"));
+		assert!(check_vault_name("vault中文名字"));
 	}
 
 	#[test]
diff --git a/util/src/journaldb/archivedb.rs b/util/src/journaldb/archivedb.rs
index 1f9381c99..9099ff03b 100644
--- a/util/src/journaldb/archivedb.rs
+++ b/util/src/journaldb/archivedb.rs
@@ -239,6 +239,21 @@ mod tests {
 		jdb.commit_batch(3, &b"3".sha3(), Some((0, b"0".sha3()))).unwrap();
 		assert!(jdb.contains(&h));
 		jdb.commit_batch(4, &b"4".sha3(), Some((1, b"1".sha3()))).unwrap();
+		assert!(jdb.contains(&h));
+	}
+
+	#[test]
+	#[should_panic]
+	fn multiple_owed_removal_not_allowed() {
+		let mut jdb = ArchiveDB::new_temp();
+		let h = jdb.insert(b"foo");
+		jdb.commit_batch(0, &b"0".sha3(), None).unwrap();
+		assert!(jdb.contains(&h));
+		jdb.remove(&h);
+		jdb.remove(&h);
+		// commit_batch would call journal_under(),
+		// and we don't allow multiple owned removals.
+		jdb.commit_batch(1, &b"1".sha3(), None).unwrap();
 	}
 
 	#[test]