diff --git a/backend/mirai-console/src/test/kotlin/net/mamoe/mirai/console/command/TestCommands.kt b/backend/mirai-console/src/test/kotlin/net/mamoe/mirai/console/command/TestCommands.kt
index bfcc0bd25..797047519 100644
--- a/backend/mirai-console/src/test/kotlin/net/mamoe/mirai/console/command/TestCommands.kt
+++ b/backend/mirai-console/src/test/kotlin/net/mamoe/mirai/console/command/TestCommands.kt
@@ -100,9 +100,6 @@ internal inline fun withSender(block: CommandSender.() -> Unit): MessageChain {
             result.add(message)
         }
 
-        override fun appendMessage(message: String) {
-            result.add(message)
-        }
     }
     sender.let(block)
     return result.asMessageChain()