diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/plugin/jvm/AbstractJvmPlugin.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/plugin/jvm/AbstractJvmPlugin.kt
index ad910d908..ae6fc008a 100644
--- a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/plugin/jvm/AbstractJvmPlugin.kt
+++ b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/plugin/jvm/AbstractJvmPlugin.kt
@@ -13,8 +13,6 @@ package net.mamoe.mirai.console.plugin.jvm
 
 import net.mamoe.mirai.console.plugin.internal.JvmPluginInternal
 import net.mamoe.mirai.console.setting.Setting
-import net.mamoe.mirai.console.setting.getValue
-import net.mamoe.mirai.console.setting.value
 import kotlin.coroutines.CoroutineContext
 import kotlin.coroutines.EmptyCoroutineContext
 
@@ -30,12 +28,4 @@ abstract class AbstractJvmPlugin @JvmOverloads constructor(
     final override val name: String get() = this.description.name
 
     override fun <T : Setting> getSetting(clazz: Class<T>): T = loader.settingStorage.load(this, clazz)
-}
-
-
-object MyPlugin : KotlinPlugin()
-
-object TestSetting : Setting by MyPlugin.getSetting() {
-    val account by value("123456")
-    val password by value("123")
 }
\ No newline at end of file
diff --git a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/Setting.kt b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/Setting.kt
index 01f8ecb86..6557b1d72 100644
--- a/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/Setting.kt
+++ b/backend/mirai-console/src/main/kotlin/net/mamoe/mirai/console/setting/Setting.kt
@@ -55,6 +55,8 @@ interface Setting {
 
     // TODO: 2020/6/26 document
     val updaterSerializer: KSerializer<Unit>
+
+    fun onValueChanged(value: Value<*>)
 }
 
 //// region Setting_value_primitives CODEGEN ////
diff --git a/backend/mirai-console/src/test/kotlin/net/mamoe/mirai/console/command/TestComposite.kt b/backend/mirai-console/src/test/kotlin/net/mamoe/mirai/console/command/TestComposite.kt
index 133eb62db..2494c0de7 100644
--- a/backend/mirai-console/src/test/kotlin/net/mamoe/mirai/console/command/TestComposite.kt
+++ b/backend/mirai-console/src/test/kotlin/net/mamoe/mirai/console/command/TestComposite.kt
@@ -7,6 +7,8 @@
  * https://github.com/mamoe/mirai/blob/master/LICENSE
  */
 
+@file:Suppress("unused")
+
 package net.mamoe.mirai.console.command
 
 import net.mamoe.mirai.contact.Member