diff --git a/src/agents/chutes-oauth.test.ts b/src/agents/chutes-oauth.test.ts
index 5ac270699c9..70721bff752 100644
--- a/src/agents/chutes-oauth.test.ts
+++ b/src/agents/chutes-oauth.test.ts
@@ -6,10 +6,17 @@ import {
   refreshChutesTokens,
 } from "./chutes-oauth.js";
 
+const urlToString = (url: Request | URL | string): string => {
+  if (typeof url === "string") {
+    return url;
+  }
+  return "url" in url ? url.url : String(url);
+};
+
 describe("chutes-oauth", () => {
   it("exchanges code for tokens and stores username as email", async () => {
     const fetchFn: typeof fetch = async (input, init) => {
-      const url = String(input);
+      const url = urlToString(input);
       if (url === CHUTES_TOKEN_ENDPOINT) {
         expect(init?.method).toBe("POST");
         expect(
@@ -59,7 +66,7 @@ describe("chutes-oauth", () => {
 
   it("refreshes tokens using stored client id and falls back to old refresh token", async () => {
     const fetchFn: typeof fetch = async (input, init) => {
-      const url = String(input);
+      const url = urlToString(input);
       if (url !== CHUTES_TOKEN_ENDPOINT) {
         return new Response("not found", { status: 404 });
       }
diff --git a/src/agents/openai-responses.reasoning-replay.test.ts b/src/agents/openai-responses.reasoning-replay.test.ts
index d5e1e2cf585..de4b10cd62d 100644
--- a/src/agents/openai-responses.reasoning-replay.test.ts
+++ b/src/agents/openai-responses.reasoning-replay.test.ts
@@ -37,7 +37,7 @@ function installFailingFetchCapture() {
       if (rawBody instanceof ArrayBuffer) {
         return Buffer.from(new Uint8Array(rawBody)).toString("utf8");
       }
-      return String(rawBody);
+      return null;
     })();
     lastBody = bodyText ? (JSON.parse(bodyText) as unknown) : undefined;
     throw new Error("intentional fetch abort (test)");
diff --git a/src/agents/session-write-lock.test.ts b/src/agents/session-write-lock.test.ts
index 16c28ae7aa8..bbe26cb7096 100644
--- a/src/agents/session-write-lock.test.ts
+++ b/src/agents/session-write-lock.test.ts
@@ -103,7 +103,7 @@ describe("acquireSessionWriteLock", () => {
   });
   it("cleans up locks on SIGINT without removing other handlers", async () => {
     const root = await fs.mkdtemp(path.join(os.tmpdir(), "openclaw-lock-"));
-    const originalKill = process.kill.bind(process) as typeof process.kill;
+    const originalKill = process.kill.bind(process);
     const killCalls: Array<NodeJS.Signals | undefined> = [];
     let otherHandlerCalled = false;
 
diff --git a/src/commands/chutes-oauth.test.ts b/src/commands/chutes-oauth.test.ts
index 9a0e49d0f6c..f958d1acc67 100644
--- a/src/commands/chutes-oauth.test.ts
+++ b/src/commands/chutes-oauth.test.ts
@@ -19,13 +19,20 @@ async function getFreePort(): Promise<number> {
   });
 }
 
+const urlToString = (url: Request | URL | string): string => {
+  if (typeof url === "string") {
+    return url;
+  }
+  return "url" in url ? url.url : String(url);
+};
+
 describe("loginChutes", () => {
   it("captures local redirect and exchanges code for tokens", async () => {
     const port = await getFreePort();
     const redirectUri = `http://127.0.0.1:${port}/oauth-callback`;
 
     const fetchFn: typeof fetch = async (input, init) => {
-      const url = String(input);
+      const url = urlToString(input);
       if (url === CHUTES_TOKEN_ENDPOINT) {
         return new Response(
           JSON.stringify({
@@ -68,7 +75,7 @@ describe("loginChutes", () => {
 
   it("supports manual flow with pasted code", async () => {
     const fetchFn: typeof fetch = async (input) => {
-      const url = String(input);
+      const url = urlToString(input);
       if (url === CHUTES_TOKEN_ENDPOINT) {
         return new Response(
           JSON.stringify({
@@ -107,7 +114,7 @@ describe("loginChutes", () => {
 
   it("does not reuse code_verifier as state", async () => {
     const fetchFn: typeof fetch = async (input) => {
-      const url = String(input);
+      const url = urlToString(input);
       if (url === CHUTES_TOKEN_ENDPOINT) {
         return new Response(
           JSON.stringify({
diff --git a/src/infra/warning-filter.test.ts b/src/infra/warning-filter.test.ts
index bd3ff1247c2..f16c17ba1d2 100644
--- a/src/infra/warning-filter.test.ts
+++ b/src/infra/warning-filter.test.ts
@@ -2,7 +2,7 @@ import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import { installProcessWarningFilter, shouldIgnoreWarning } from "./warning-filter.js";
 
 const warningFilterKey = Symbol.for("openclaw.warning-filter");
-const baseEmitWarning = process.emitWarning.bind(process) as typeof process.emitWarning;
+const baseEmitWarning = process.emitWarning.bind(process);
 
 function resetWarningFilterInstallState(): void {
   const globalState = globalThis as typeof globalThis & {