diff --git a/.Lib9c.Tests/Action/Scenario/ArenaScenarioTest.cs b/.Lib9c.Tests/Action/Scenario/ArenaScenarioTest.cs
index 64ec2fc034..6c2b81092c 100644
--- a/.Lib9c.Tests/Action/Scenario/ArenaScenarioTest.cs
+++ b/.Lib9c.Tests/Action/Scenario/ArenaScenarioTest.cs
@@ -130,7 +130,7 @@ public IAccount BattleArena(
             int ticket,
             long blockIndex)
         {
-            var action = new BattleArena6()
+            var action = new BattleArena()
             {
                 myAvatarAddress = myAvatarAddress,
                 enemyAvatarAddress = enemyAvatarAddress,
diff --git a/.Lib9c.Tests/Action/Scenario/AuraScenarioTest.cs b/.Lib9c.Tests/Action/Scenario/AuraScenarioTest.cs
index 4085442cef..30fd2f40c3 100644
--- a/.Lib9c.Tests/Action/Scenario/AuraScenarioTest.cs
+++ b/.Lib9c.Tests/Action/Scenario/AuraScenarioTest.cs
@@ -228,7 +228,7 @@ public void Arena()
                 var enemyAvatarAddress = avatarAddress.Equals(_avatarAddress)
                     ? _enemyAvatarAddress
                     : _avatarAddress;
-                var battle = new BattleArena13
+                var battle = new BattleArena
                 {
                     myAvatarAddress = avatarAddress,
                     enemyAvatarAddress = enemyAvatarAddress,