diff --git a/src/telegram/bot-handlers.ts b/src/telegram/bot-handlers.ts
index ed61863467..910956635d 100644
--- a/src/telegram/bot-handlers.ts
+++ b/src/telegram/bot-handlers.ts
@@ -57,11 +57,21 @@ export const registerTelegramHandlers = ({
   processMessage,
   logger,
 }: RegisterTelegramHandlerParams) => {
+  const DEFAULT_TEXT_FRAGMENT_MAX_GAP_MS = 1500;
   const TELEGRAM_TEXT_FRAGMENT_START_THRESHOLD_CHARS = 4000;
-  const TELEGRAM_TEXT_FRAGMENT_MAX_GAP_MS = 1500;
+  const TELEGRAM_TEXT_FRAGMENT_MAX_GAP_MS =
+    typeof opts.testTimings?.textFragmentGapMs === "number" &&
+    Number.isFinite(opts.testTimings.textFragmentGapMs)
+      ? Math.max(10, Math.floor(opts.testTimings.textFragmentGapMs))
+      : DEFAULT_TEXT_FRAGMENT_MAX_GAP_MS;
   const TELEGRAM_TEXT_FRAGMENT_MAX_ID_GAP = 1;
   const TELEGRAM_TEXT_FRAGMENT_MAX_PARTS = 12;
   const TELEGRAM_TEXT_FRAGMENT_MAX_TOTAL_CHARS = 50_000;
+  const mediaGroupTimeoutMs =
+    typeof opts.testTimings?.mediaGroupFlushMs === "number" &&
+    Number.isFinite(opts.testTimings.mediaGroupFlushMs)
+      ? Math.max(10, Math.floor(opts.testTimings.mediaGroupFlushMs))
+      : MEDIA_GROUP_TIMEOUT_MS;
 
   const mediaGroupBuffer = new Map<string, MediaGroupEntry>();
   let mediaGroupProcessing: Promise<void> = Promise.resolve();
@@ -859,7 +869,7 @@ export const registerTelegramHandlers = ({
               })
               .catch(() => undefined);
             await mediaGroupProcessing;
-          }, MEDIA_GROUP_TIMEOUT_MS);
+          }, mediaGroupTimeoutMs);
         } else {
           const entry: MediaGroupEntry = {
             messages: [{ msg, ctx }],
@@ -871,7 +881,7 @@ export const registerTelegramHandlers = ({
                 })
                 .catch(() => undefined);
               await mediaGroupProcessing;
-            }, MEDIA_GROUP_TIMEOUT_MS),
+            }, mediaGroupTimeoutMs),
           };
           mediaGroupBuffer.set(mediaGroupId, entry);
         }
diff --git a/src/telegram/bot.media.downloads-media-file-path-no-file-download.e2e.test.ts b/src/telegram/bot.media.downloads-media-file-path-no-file-download.e2e.test.ts
index 6e2416c4f4..e0440b3a31 100644
--- a/src/telegram/bot.media.downloads-media-file-path-no-file-download.e2e.test.ts
+++ b/src/telegram/bot.media.downloads-media-file-path-no-file-download.e2e.test.ts
@@ -1,7 +1,6 @@
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import { resetInboundDedupe } from "../auto-reply/reply/inbound-dedupe.js";
 import * as ssrf from "../infra/net/ssrf.js";
-import { MEDIA_GROUP_TIMEOUT_MS } from "./bot-updates.js";
 
 const useSpy = vi.fn();
 const middlewareUseSpy = vi.fn();
@@ -14,6 +13,10 @@ const describeStickerImageSpy = vi.fn();
 const resolvePinnedHostname = ssrf.resolvePinnedHostname;
 const lookupMock = vi.fn();
 let resolvePinnedHostnameSpy: ReturnType<typeof vi.spyOn> = null;
+const TELEGRAM_TEST_TIMINGS = {
+  mediaGroupFlushMs: 75,
+  textFragmentGapMs: 120,
+} as const;
 
 const sleep = async (ms: number) => {
   await new Promise<void>((resolve) => setTimeout(resolve, ms));
@@ -141,6 +144,7 @@ describe("telegram inbound media", () => {
       const runtimeError = vi.fn();
       createTelegramBot({
         token: "tok",
+        testTimings: TELEGRAM_TEST_TIMINGS,
         runtime: {
           log: runtimeLog,
           error: runtimeError,
@@ -207,6 +211,7 @@ describe("telegram inbound media", () => {
 
     createTelegramBot({
       token: "tok",
+      testTimings: TELEGRAM_TEST_TIMINGS,
       proxyFetch: proxyFetch as unknown as typeof fetch,
       runtime: {
         log: runtimeLog,
@@ -254,6 +259,7 @@ describe("telegram inbound media", () => {
 
     createTelegramBot({
       token: "tok",
+      testTimings: TELEGRAM_TEST_TIMINGS,
       runtime: {
         log: runtimeLog,
         error: runtimeError,
@@ -294,7 +300,7 @@ describe("telegram media groups", () => {
   });
 
   const MEDIA_GROUP_TEST_TIMEOUT_MS = process.platform === "win32" ? 45_000 : 20_000;
-  const MEDIA_GROUP_FLUSH_MS = MEDIA_GROUP_TIMEOUT_MS + 25;
+  const MEDIA_GROUP_FLUSH_MS = TELEGRAM_TEST_TIMINGS.mediaGroupFlushMs + 120;
 
   it(
     "buffers messages with same media_group_id and processes them together",
@@ -317,6 +323,7 @@ describe("telegram media groups", () => {
 
       createTelegramBot({
         token: "tok",
+        testTimings: TELEGRAM_TEST_TIMINGS,
         runtime: {
           log: vi.fn(),
           error: runtimeError,
@@ -390,7 +397,7 @@ describe("telegram media groups", () => {
         arrayBuffer: async () => new Uint8Array([0x89, 0x50, 0x4e, 0x47]).buffer,
       } as Response);
 
-      createTelegramBot({ token: "tok" });
+      createTelegramBot({ token: "tok", testTimings: TELEGRAM_TEST_TIMINGS });
       const handler = onSpy.mock.calls.find((call) => call[0] === "message")?.[1] as (
         ctx: Record<string, unknown>,
       ) => Promise<void>;
@@ -459,6 +466,7 @@ describe("telegram stickers", () => {
       const runtimeError = vi.fn();
       createTelegramBot({
         token: "tok",
+        testTimings: TELEGRAM_TEST_TIMINGS,
         runtime: {
           log: runtimeLog,
           error: runtimeError,
@@ -541,6 +549,7 @@ describe("telegram stickers", () => {
       const runtimeError = vi.fn();
       createTelegramBot({
         token: "tok",
+        testTimings: TELEGRAM_TEST_TIMINGS,
         runtime: {
           log: vi.fn(),
           error: runtimeError,
@@ -615,6 +624,7 @@ describe("telegram stickers", () => {
 
       createTelegramBot({
         token: "tok",
+        testTimings: TELEGRAM_TEST_TIMINGS,
         runtime: {
           log: vi.fn(),
           error: runtimeError,
@@ -675,6 +685,7 @@ describe("telegram stickers", () => {
 
       createTelegramBot({
         token: "tok",
+        testTimings: TELEGRAM_TEST_TIMINGS,
         runtime: {
           log: vi.fn(),
           error: runtimeError,
@@ -726,7 +737,7 @@ describe("telegram text fragments", () => {
   });
 
   const TEXT_FRAGMENT_TEST_TIMEOUT_MS = process.platform === "win32" ? 45_000 : 20_000;
-  const TEXT_FRAGMENT_FLUSH_MS = 1600;
+  const TEXT_FRAGMENT_FLUSH_MS = TELEGRAM_TEST_TIMINGS.textFragmentGapMs + 160;
 
   it(
     "buffers near-limit text and processes sequential parts as one message",
@@ -738,7 +749,7 @@ describe("telegram text fragments", () => {
       onSpy.mockReset();
       replySpy.mockReset();
 
-      createTelegramBot({ token: "tok" });
+      createTelegramBot({ token: "tok", testTimings: TELEGRAM_TEST_TIMINGS });
       const handler = onSpy.mock.calls.find((call) => call[0] === "message")?.[1] as (
         ctx: Record<string, unknown>,
       ) => Promise<void>;
diff --git a/src/telegram/bot.ts b/src/telegram/bot.ts
index 61e2038b6c..4101ce66fb 100644
--- a/src/telegram/bot.ts
+++ b/src/telegram/bot.ts
@@ -62,6 +62,10 @@ export type TelegramBotOptions = {
     lastUpdateId?: number | null;
     onUpdateId?: (updateId: number) => void | Promise<void>;
   };
+  testTimings?: {
+    mediaGroupFlushMs?: number;
+    textFragmentGapMs?: number;
+  };
 };
 
 export function getTelegramSequentialKey(ctx: {