diff --git a/src/agents/model-scan.ts b/src/agents/model-scan.ts
index 996a367278..5554692e4a 100644
--- a/src/agents/model-scan.ts
+++ b/src/agents/model-scan.ts
@@ -185,7 +185,7 @@ async function withTimeout<T>(
   fn: (signal: AbortSignal) => Promise<T>,
 ): Promise<T> {
   const controller = new AbortController();
-  const timer = setTimeout(() => controller.abort(), timeoutMs);
+  const timer = setTimeout(controller.abort.bind(controller), timeoutMs);
   try {
     return await fn(controller.signal);
   } finally {
diff --git a/src/agents/pi-tools.abort.ts b/src/agents/pi-tools.abort.ts
index c7e50cab05..04152a3588 100644
--- a/src/agents/pi-tools.abort.ts
+++ b/src/agents/pi-tools.abort.ts
@@ -36,7 +36,7 @@ function combineAbortSignals(a?: AbortSignal, b?: AbortSignal): AbortSignal | un
   }
 
   const controller = new AbortController();
-  const onAbort = () => controller.abort();
+  const onAbort = controller.abort.bind(controller);
   a?.addEventListener("abort", onAbort, { once: true });
   b?.addEventListener("abort", onAbort, { once: true });
   return controller.signal;
diff --git a/src/agents/sandbox/browser.ts b/src/agents/sandbox/browser.ts
index dec93370aa..f4b268fb15 100644
--- a/src/agents/sandbox/browser.ts
+++ b/src/agents/sandbox/browser.ts
@@ -24,7 +24,7 @@ async function waitForSandboxCdp(params: { cdpPort: number; timeoutMs: number })
   while (Date.now() < deadline) {
     try {
       const ctrl = new AbortController();
-      const t = setTimeout(() => ctrl.abort(), 1000);
+      const t = setTimeout(ctrl.abort.bind(ctrl), 1000);
       try {
         const res = await fetch(url, { signal: ctrl.signal });
         if (res.ok) {
diff --git a/src/agents/tools/web-shared.ts b/src/agents/tools/web-shared.ts
index d172a06341..2a7353796e 100644
--- a/src/agents/tools/web-shared.ts
+++ b/src/agents/tools/web-shared.ts
@@ -65,7 +65,7 @@ export function withTimeout(signal: AbortSignal | undefined, timeoutMs: number):
     return signal ?? new AbortController().signal;
   }
   const controller = new AbortController();
-  const timer = setTimeout(() => controller.abort(), timeoutMs);
+  const timer = setTimeout(controller.abort.bind(controller), timeoutMs);
   if (signal) {
     signal.addEventListener(
       "abort",
diff --git a/src/browser/cdp.helpers.ts b/src/browser/cdp.helpers.ts
index 2c3f4c0af0..dc7e681483 100644
--- a/src/browser/cdp.helpers.ts
+++ b/src/browser/cdp.helpers.ts
@@ -114,7 +114,7 @@ function createCdpSender(ws: WebSocket) {
 
 export async function fetchJson<T>(url: string, timeoutMs = 1500, init?: RequestInit): Promise<T> {
   const ctrl = new AbortController();
-  const t = setTimeout(() => ctrl.abort(), timeoutMs);
+  const t = setTimeout(ctrl.abort.bind(ctrl), timeoutMs);
   try {
     const headers = getHeadersWithAuth(url, (init?.headers as Record<string, string>) || {});
     const res = await fetch(url, { ...init, headers, signal: ctrl.signal });
@@ -129,7 +129,7 @@ export async function fetchJson<T>(url: string, timeoutMs = 1500, init?: Request
 
 export async function fetchOk(url: string, timeoutMs = 1500, init?: RequestInit): Promise<void> {
   const ctrl = new AbortController();
-  const t = setTimeout(() => ctrl.abort(), timeoutMs);
+  const t = setTimeout(ctrl.abort.bind(ctrl), timeoutMs);
   try {
     const headers = getHeadersWithAuth(url, (init?.headers as Record<string, string>) || {});
     const res = await fetch(url, { ...init, headers, signal: ctrl.signal });
diff --git a/src/browser/chrome.ts b/src/browser/chrome.ts
index 8c854caece..3d944aa35d 100644
--- a/src/browser/chrome.ts
+++ b/src/browser/chrome.ts
@@ -80,7 +80,7 @@ type ChromeVersion = {
 
 async function fetchChromeVersion(cdpUrl: string, timeoutMs = 500): Promise<ChromeVersion | null> {
   const ctrl = new AbortController();
-  const t = setTimeout(() => ctrl.abort(), timeoutMs);
+  const t = setTimeout(ctrl.abort.bind(ctrl), timeoutMs);
   try {
     const versionUrl = appendCdpPath(cdpUrl, "/json/version");
     const res = await fetch(versionUrl, {
diff --git a/src/browser/server-context.ts b/src/browser/server-context.ts
index 7957b3bfaa..d6e0e8f047 100644
--- a/src/browser/server-context.ts
+++ b/src/browser/server-context.ts
@@ -51,7 +51,7 @@ function normalizeWsUrl(raw: string | undefined, cdpBaseUrl: string): string | u
 
 async function fetchJson<T>(url: string, timeoutMs = 1500, init?: RequestInit): Promise<T> {
   const ctrl = new AbortController();
-  const t = setTimeout(() => ctrl.abort(), timeoutMs);
+  const t = setTimeout(ctrl.abort.bind(ctrl), timeoutMs);
   try {
     const headers = getHeadersWithAuth(url, (init?.headers as Record<string, string>) || {});
     const res = await fetch(url, { ...init, headers, signal: ctrl.signal });
@@ -66,7 +66,7 @@ async function fetchJson<T>(url: string, timeoutMs = 1500, init?: RequestInit):
 
 async function fetchOk(url: string, timeoutMs = 1500, init?: RequestInit): Promise<void> {
   const ctrl = new AbortController();
-  const t = setTimeout(() => ctrl.abort(), timeoutMs);
+  const t = setTimeout(ctrl.abort.bind(ctrl), timeoutMs);
   try {
     const headers = getHeadersWithAuth(url, (init?.headers as Record<string, string>) || {});
     const res = await fetch(url, { ...init, headers, signal: ctrl.signal });
diff --git a/src/infra/fetch.ts b/src/infra/fetch.ts
index 86fd789dd9..23791227d8 100644
--- a/src/infra/fetch.ts
+++ b/src/infra/fetch.ts
@@ -42,7 +42,7 @@ export function wrapFetchWithAbortSignal(fetchImpl: typeof fetch): typeof fetch
       return fetchImpl(input, patchedInit);
     }
     const controller = new AbortController();
-    const onAbort = () => controller.abort();
+    const onAbort = controller.abort.bind(controller);
     if (signal.aborted) {
       controller.abort();
     } else {
diff --git a/src/infra/net/fetch-guard.ts b/src/infra/net/fetch-guard.ts
index 21f6655cec..ac51bc2faf 100644
--- a/src/infra/net/fetch-guard.ts
+++ b/src/infra/net/fetch-guard.ts
@@ -50,8 +50,8 @@ function buildAbortSignal(params: { timeoutMs?: number; signal?: AbortSignal }):
   }
 
   const controller = new AbortController();
-  const timeoutId = setTimeout(() => controller.abort(), timeoutMs);
-  const onAbort = () => controller.abort();
+  const timeoutId = setTimeout(controller.abort.bind(controller), timeoutMs);
+  const onAbort = controller.abort.bind(controller);
   if (signal) {
     if (signal.aborted) {
       controller.abort();
diff --git a/src/infra/provider-usage.fetch.shared.ts b/src/infra/provider-usage.fetch.shared.ts
index 3e80622779..a4eb1ee630 100644
--- a/src/infra/provider-usage.fetch.shared.ts
+++ b/src/infra/provider-usage.fetch.shared.ts
@@ -5,7 +5,7 @@ export async function fetchJson(
   fetchFn: typeof fetch,
 ): Promise<Response> {
   const controller = new AbortController();
-  const timer = setTimeout(() => controller.abort(), timeoutMs);
+  const timer = setTimeout(controller.abort.bind(controller), timeoutMs);
   try {
     return await fetchFn(url, { ...init, signal: controller.signal });
   } finally {
diff --git a/src/tts/tts.ts b/src/tts/tts.ts
index 39405d2c3b..4b4b3197c9 100644
--- a/src/tts/tts.ts
+++ b/src/tts/tts.ts
@@ -937,7 +937,7 @@ async function summarizeText(params: {
 
   try {
     const controller = new AbortController();
-    const timeout = setTimeout(() => controller.abort(), timeoutMs);
+    const timeout = setTimeout(controller.abort.bind(controller), timeoutMs);
 
     try {
       const res = await completeSimple(
@@ -1038,7 +1038,7 @@ async function elevenLabsTTS(params: {
   const normalizedSeed = normalizeSeed(seed);
 
   const controller = new AbortController();
-  const timeout = setTimeout(() => controller.abort(), timeoutMs);
+  const timeout = setTimeout(controller.abort.bind(controller), timeoutMs);
 
   try {
     const url = new URL(`${normalizeElevenLabsBaseUrl(baseUrl)}/v1/text-to-speech/${voiceId}`);
@@ -1098,7 +1098,7 @@ async function openaiTTS(params: {
   }
 
   const controller = new AbortController();
-  const timeout = setTimeout(() => controller.abort(), timeoutMs);
+  const timeout = setTimeout(controller.abort.bind(controller), timeoutMs);
 
   try {
     const response = await fetch(`${getOpenAITtsBaseUrl()}/audio/speech`, {
diff --git a/src/utils/fetch-timeout.ts b/src/utils/fetch-timeout.ts
index 13f3e0669a..f9567fbcdb 100644
--- a/src/utils/fetch-timeout.ts
+++ b/src/utils/fetch-timeout.ts
@@ -15,7 +15,7 @@ export async function fetchWithTimeout(
   fetchFn: typeof fetch = fetch,
 ): Promise<Response> {
   const controller = new AbortController();
-  const timer = setTimeout(() => controller.abort(), Math.max(1, timeoutMs));
+  const timer = setTimeout(controller.abort.bind(controller), Math.max(1, timeoutMs));
   try {
     return await fetchFn(url, { ...init, signal: controller.signal });
   } finally {