diff --git a/test/e2e/qa-lab/runtime/qa-otel-smoke-runtime.ts b/test/e2e/qa-lab/runtime/qa-otel-smoke-runtime.ts
index e7212556259..68631c08e12 100644
--- a/test/e2e/qa-lab/runtime/qa-otel-smoke-runtime.ts
+++ b/test/e2e/qa-lab/runtime/qa-otel-smoke-runtime.ts
@@ -10,6 +10,7 @@ import { tmpdir } from "node:os";
 import path from "node:path";
 import { pathToFileURL } from "node:url";
 import { gunzipSync } from "node:zlib";
+import { resolveTimerTimeoutMs } from "@openclaw/normalization-core/number-coercion";
 import { stripLeadingPackageManagerSeparator } from "../../../../scripts/lib/arg-utils.mjs";
 import { resolveWindowsTaskkillPath } from "../../../../scripts/lib/windows-taskkill.mjs";
 
@@ -1275,12 +1276,13 @@ async function waitForChild(
   timeoutMs = QA_SUITE_TIMEOUT_MS,
   killGraceMs = QA_SUITE_KILL_GRACE_MS,
 ): Promise<number> {
+  const resolvedTimeoutMs = resolveTimerTimeoutMs(timeoutMs, QA_SUITE_TIMEOUT_MS);
   const childExit = new Promise<number>((resolve) => {
     child.once("close", (code) => resolve(code ?? 1));
   });
   let timeoutHandle: NodeJS.Timeout | undefined;
   const timeout = new Promise<"timeout">((resolve) => {
-    timeoutHandle = setTimeout(() => resolve("timeout"), timeoutMs);
+    timeoutHandle = setTimeout(() => resolve("timeout"), resolvedTimeoutMs);
     timeoutHandle.unref();
   });
   const result = await Promise.race([childExit, timeout]).finally(() => {
@@ -1298,7 +1300,7 @@ async function waitForChild(
     terminateChildTree(child, "SIGKILL", cleanupPids);
     await waitForProcessTreeExit(child, 1000, cleanupPids);
   }
-  throw new Error(`openclaw qa suite timed out after ${timeoutMs}ms`);
+  throw new Error(`openclaw qa suite timed out after ${resolvedTimeoutMs}ms`);
 }
 
 function collectChildProcessTreePids(child: ChildProcess): number[] {
diff --git a/test/e2e/qa-lab/runtime/qa-otel-smoke.e2e.test.ts b/test/e2e/qa-lab/runtime/qa-otel-smoke.e2e.test.ts
index 981db576227..dd01257c182 100644
--- a/test/e2e/qa-lab/runtime/qa-otel-smoke.e2e.test.ts
+++ b/test/e2e/qa-lab/runtime/qa-otel-smoke.e2e.test.ts
@@ -7,6 +7,7 @@ import os from "node:os";
 import path from "node:path";
 import { setTimeout as delay } from "node:timers/promises";
 import { gzipSync } from "node:zlib";
+import { MAX_TIMER_TIMEOUT_MS } from "@openclaw/normalization-core/number-coercion";
 import { afterEach, beforeAll, describe, expect, it, vi } from "vitest";
 import { resolveWindowsTaskkillPath } from "../../../../scripts/lib/windows-taskkill.mjs";
 import { testing } from "./qa-otel-smoke-runtime.js";
@@ -662,6 +663,16 @@ describe("qa-otel-smoke receiver bounds", () => {
     }
   });
 
+  it("clamps oversized QA suite child timers before scheduling", async () => {
+    const child = spawn(
+      process.execPath,
+      ["--input-type=module", "--eval", "setTimeout(() => process.exit(0), 25);"],
+      { stdio: "ignore" },
+    );
+
+    await expect(testing.waitForChild(child, MAX_TIMER_TIMEOUT_MS + 1, 100)).resolves.toBe(0);
+  });
+
   it("uses taskkill for Windows QA suite timeout cleanup", () => {
     const kill = vi.fn();
     const runTaskkill = vi.fn(() => ({ status: 0 }));