diff --git a/src/line/probe.ts b/src/line/probe.ts
index d5f7755cd2b..0da983de465 100644
--- a/src/line/probe.ts
+++ b/src/line/probe.ts
@@ -1,5 +1,6 @@
 import { messagingApi } from "@line/bot-sdk";
 import type { LineProbeResult } from "./types.js";
+import { withTimeout } from "../utils/with-timeout.js";
 
 export async function probeLineBot(
   channelAccessToken: string,
@@ -30,18 +31,3 @@ export async function probeLineBot(
     return { ok: false, error: message };
   }
 }
-
-function withTimeout<T>(promise: Promise<T>, timeoutMs: number): Promise<T> {
-  if (!timeoutMs || timeoutMs <= 0) {
-    return promise;
-  }
-  let timer: NodeJS.Timeout | null = null;
-  const timeout = new Promise<T>((_, reject) => {
-    timer = setTimeout(() => reject(new Error("timeout")), timeoutMs);
-  });
-  return Promise.race([promise, timeout]).finally(() => {
-    if (timer) {
-      clearTimeout(timer);
-    }
-  });
-}
diff --git a/src/slack/probe.ts b/src/slack/probe.ts
index fa67b1f191e..22857ca2bc6 100644
--- a/src/slack/probe.ts
+++ b/src/slack/probe.ts
@@ -1,4 +1,5 @@
 import type { BaseProbeResult } from "../channels/plugins/types.js";
+import { withTimeout } from "../utils/with-timeout.js";
 import { createSlackWebClient } from "./client.js";
 
 export type SlackProbe = BaseProbeResult & {
@@ -8,21 +9,6 @@ export type SlackProbe = BaseProbeResult & {
   team?: { id?: string; name?: string };
 };
 
-function withTimeout<T>(promise: Promise<T>, timeoutMs: number): Promise<T> {
-  if (!timeoutMs || timeoutMs <= 0) {
-    return promise;
-  }
-  let timer: NodeJS.Timeout | null = null;
-  const timeout = new Promise<T>((_, reject) => {
-    timer = setTimeout(() => reject(new Error("timeout")), timeoutMs);
-  });
-  return Promise.race([promise, timeout]).finally(() => {
-    if (timer) {
-      clearTimeout(timer);
-    }
-  });
-}
-
 export async function probeSlack(token: string, timeoutMs = 2500): Promise<SlackProbe> {
   const client = createSlackWebClient(token);
   const start = Date.now();
diff --git a/src/utils/with-timeout.ts b/src/utils/with-timeout.ts
new file mode 100644
index 00000000000..7a2d8361df1
--- /dev/null
+++ b/src/utils/with-timeout.ts
@@ -0,0 +1,14 @@
+export function withTimeout<T>(promise: Promise<T>, timeoutMs: number): Promise<T> {
+  if (!timeoutMs || timeoutMs <= 0) {
+    return promise;
+  }
+  let timer: NodeJS.Timeout | null = null;
+  const timeout = new Promise<T>((_, reject) => {
+    timer = setTimeout(() => reject(new Error("timeout")), timeoutMs);
+  });
+  return Promise.race([promise, timeout]).finally(() => {
+    if (timer) {
+      clearTimeout(timer);
+    }
+  });
+}