diff --git a/mirai-core-api/src/commonMain/kotlin/message/data/At.kt b/mirai-core-api/src/commonMain/kotlin/message/data/At.kt
index 8f5c9d439..3bdc7bd93 100644
--- a/mirai-core-api/src/commonMain/kotlin/message/data/At.kt
+++ b/mirai-core-api/src/commonMain/kotlin/message/data/At.kt
@@ -41,7 +41,7 @@ public data class At(
         /**
          * 构造一个 [At], 仅供内部使用, 否则可能造成消息无法发出的问题.
          */
-        @Suppress("FunctionName", "UnusedParameter")
+        @Suppress("FunctionName", "UNUSED_PARAMETER")
         @JvmStatic
         @LowLevelApi
         @Deprecated("Use constructor instead", ReplaceWith("At(target)", "net.mamoe.mirai.message.data.At"))
diff --git a/mirai-core-api/src/commonMain/kotlin/utils/FileCacheStrategy.kt b/mirai-core-api/src/commonMain/kotlin/utils/FileCacheStrategy.kt
index bffe3b98f..23e71fc3e 100644
--- a/mirai-core-api/src/commonMain/kotlin/utils/FileCacheStrategy.kt
+++ b/mirai-core-api/src/commonMain/kotlin/utils/FileCacheStrategy.kt
@@ -127,7 +127,7 @@ public interface FileCacheStrategy {
         @MiraiExperimentalApi
         @Throws(java.io.IOException::class)
         override fun newImageCache(input: Input): ExternalImage {
-            return ExternalImage(createTempFile(directory = directory).apply {
+            return ExternalImage(File.createTempFile("tmp", null, directory).apply {
                 deleteOnExit()
                 input.withOut(this.outputStream()) { copyTo(it) }
             }.asReusableInput(true))
@@ -136,7 +136,7 @@ public interface FileCacheStrategy {
         @MiraiExperimentalApi
         @Throws(java.io.IOException::class)
         override fun newImageCache(input: InputStream): ExternalImage {
-            return ExternalImage(createTempFile(directory = directory).apply {
+            return ExternalImage(File.createTempFile("tmp", null, directory).apply {
                 deleteOnExit()
                 input.withOut(this.outputStream()) { copyTo(it) }
             }.asReusableInput(true))
@@ -150,7 +150,7 @@ public interface FileCacheStrategy {
 
         @MiraiExperimentalApi
         override fun newImageCache(input: BufferedImage, format: String): ExternalImage {
-            val file = createTempFile(directory = directory).apply { deleteOnExit() }
+            val file = File.createTempFile("tmp", null, directory).apply { deleteOnExit() }
 
             val digest = MessageDigest.getInstance("md5")
             digest.reset()
@@ -180,7 +180,7 @@ public interface FileCacheStrategy {
 
         @MiraiExperimentalApi
         override fun newImageCache(input: URL): ExternalImage {
-            return ExternalImage(createTempFile(directory = directory).apply {
+            return ExternalImage(File.createTempFile("tmp", null, directory).apply {
                 deleteOnExit()
                 input.openConnection().getInputStream().withOut(this.outputStream()) { copyTo(it) }
             }.asReusableInput(true))
diff --git a/mirai-core-api/src/commonMain/kotlin/utils/LoginSolver.kt b/mirai-core-api/src/commonMain/kotlin/utils/LoginSolver.kt
index 449873cef..61ff25e7a 100644
--- a/mirai-core-api/src/commonMain/kotlin/utils/LoginSolver.kt
+++ b/mirai-core-api/src/commonMain/kotlin/utils/LoginSolver.kt
@@ -112,8 +112,9 @@ public class StandardCharImageLoginSolver(
 
     override suspend fun onSolvePicCaptcha(bot: Bot, data: ByteArray): String? = loginSolverLock.withLock {
         val logger = overrideLogger ?: bot.logger
-        val tempFile: File = createTempFile(suffix = ".png").apply { deleteOnExit() }
+        @Suppress("BlockingMethodInNonBlockingContext")
         withContext(Dispatchers.IO) {
+            val tempFile: File = File.createTempFile("tmp", ".png").apply { deleteOnExit() }
             tempFile.createNewFile()
             logger.info("需要图片验证码登录, 验证码为 4 字母")
             try {
@@ -153,7 +154,7 @@ public class StandardCharImageLoginSolver(
         }
     }
 
-    override suspend fun onSolveUnsafeDeviceLoginVerify(bot: Bot, url: String): String? = loginSolverLock.withLock {
+    override suspend fun onSolveUnsafeDeviceLoginVerify(bot: Bot, url: String): String = loginSolverLock.withLock {
         val logger = overrideLogger ?: bot.logger
         logger.info("需要进行账户安全认证")
         logger.info("该账户有[设备锁]/[不常用登录地点]/[不常用设备登录]的问题")