diff --git a/src/cron/service.issue-regressions.test.ts b/src/cron/service.issue-regressions.test.ts
index e105aab48dc..8294661dd76 100644
--- a/src/cron/service.issue-regressions.test.ts
+++ b/src/cron/service.issue-regressions.test.ts
@@ -1523,7 +1523,7 @@ describe("Cron issue regressions", () => {
 
     // Keep this short for suite speed while still separating expected timeout
     // from the 1/3-regression timeout.
-    const timeoutSeconds = 0.12;
+    const timeoutSeconds = 0.06;
     const cronJob = createIsolatedRegressionJob({
       id: "timeout-fraction-29774",
       name: "timeout fraction regression",
diff --git a/src/media-understanding/apply.test.ts b/src/media-understanding/apply.test.ts
index 1c0b8f142a8..880a7cc6244 100644
--- a/src/media-understanding/apply.test.ts
+++ b/src/media-understanding/apply.test.ts
@@ -1,3 +1,4 @@
+import crypto from "node:crypto";
 import fs from "node:fs/promises";
 import path from "node:path";
 import { afterAll, beforeAll, beforeEach, describe, expect, it, vi } from "vitest";
@@ -36,6 +37,8 @@ let applyMediaUnderstanding: typeof import("./apply.js").applyMediaUnderstanding
 const TEMP_MEDIA_PREFIX = "openclaw-media-";
 let suiteTempMediaRootDir = "";
 let tempMediaDirCounter = 0;
+let sharedTempMediaCacheDir = "";
+const tempMediaFileCache = new Map<string, string>();
 
 async function createTempMediaDir() {
   if (!suiteTempMediaRootDir) {
@@ -47,6 +50,13 @@ async function createTempMediaDir() {
   return dir;
 }
 
+async function getSharedTempMediaCacheDir() {
+  if (!sharedTempMediaCacheDir) {
+    sharedTempMediaCacheDir = await createTempMediaDir();
+  }
+  return sharedTempMediaCacheDir;
+}
+
 function createGroqAudioConfig(): OpenClawConfig {
   return {
     tools: {
@@ -111,9 +121,20 @@ function createMediaDisabledConfigWithAllowedMimes(allowedMimes: string[]): Open
 }
 
 async function createTempMediaFile(params: { fileName: string; content: Buffer | string }) {
-  const dir = await createTempMediaDir();
-  const mediaPath = path.join(dir, params.fileName);
+  const normalizedContent =
+    typeof params.content === "string" ? Buffer.from(params.content) : params.content;
+  const contentHash = crypto.createHash("sha1").update(normalizedContent).digest("hex");
+  const cacheKey = `${params.fileName}:${contentHash}`;
+  const cachedPath = tempMediaFileCache.get(cacheKey);
+  if (cachedPath) {
+    return cachedPath;
+  }
+  const cacheRootDir = await getSharedTempMediaCacheDir();
+  const cacheDir = path.join(cacheRootDir, contentHash);
+  await fs.mkdir(cacheDir, { recursive: true });
+  const mediaPath = path.join(cacheDir, params.fileName);
   await fs.writeFile(mediaPath, params.content);
+  tempMediaFileCache.set(cacheKey, mediaPath);
   return mediaPath;
 }
 
@@ -234,6 +255,8 @@ describe("applyMediaUnderstanding", () => {
     }
     await fs.rm(suiteTempMediaRootDir, { recursive: true, force: true });
     suiteTempMediaRootDir = "";
+    sharedTempMediaCacheDir = "";
+    tempMediaFileCache.clear();
   });
 
   it("sets Transcript and replaces Body when audio transcription succeeds", async () => {
diff --git a/src/process/exec.test.ts b/src/process/exec.test.ts
index 6f72875f05c..2df8269bff1 100644
--- a/src/process/exec.test.ts
+++ b/src/process/exec.test.ts
@@ -66,7 +66,7 @@ describe("runCommandWithTimeout", () => {
           'process.stdout.write((process.env.OPENCLAW_BASE_ENV ?? "") + "|" + (process.env.OPENCLAW_TEST_ENV ?? ""))',
         ],
         {
-          timeoutMs: 5_000,
+          timeoutMs: 1_000,
           env: { OPENCLAW_TEST_ENV: "ok" },
         },
       );
@@ -82,7 +82,7 @@ describe("runCommandWithTimeout", () => {
       [process.execPath, "-e", "setTimeout(() => {}, 60)"],
       {
         timeoutMs: 500,
-        noOutputTimeoutMs: 20,
+        noOutputTimeoutMs: 12,
       },
     );