diff --git a/src/auto-reply/reply.block-streaming.test.ts b/src/auto-reply/reply.block-streaming.test.ts
index 0a5cb7423..cbd41c5e0 100644
--- a/src/auto-reply/reply.block-streaming.test.ts
+++ b/src/auto-reply/reply.block-streaming.test.ts
@@ -83,15 +83,23 @@ describe("block streaming", () => {
   });
 
   afterAll(async () => {
-    await fs.rm(fixtureRoot, {
-      recursive: true,
-      force: true,
-      maxRetries: 10,
-      retryDelay: 50,
-    });
+    if (process.platform === "win32") {
+      await fs.rm(fixtureRoot, {
+        recursive: true,
+        force: true,
+        maxRetries: 10,
+        retryDelay: 50,
+      });
+    } else {
+      await fs.rm(fixtureRoot, {
+        recursive: true,
+        force: true,
+      });
+    }
   });
 
   beforeEach(() => {
+    vi.stubEnv("OPENCLAW_TEST_FAST", "1");
     piEmbeddedMock.abortEmbeddedPiRun.mockReset().mockReturnValue(false);
     piEmbeddedMock.queueEmbeddedPiMessage.mockReset().mockReturnValue(false);
     piEmbeddedMock.isEmbeddedPiRunActive.mockReset().mockReturnValue(false);
diff --git a/src/auto-reply/reply.heartbeat-typing.test.ts b/src/auto-reply/reply.heartbeat-typing.test.ts
index 3b374ec48..52214e4d3 100644
--- a/src/auto-reply/reply.heartbeat-typing.test.ts
+++ b/src/auto-reply/reply.heartbeat-typing.test.ts
@@ -1,5 +1,5 @@
 import { join } from "node:path";
-import { afterEach, describe, expect, it, vi } from "vitest";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import { withTempHome as withTempHomeBase } from "../../test/helpers/temp-home.js";
 
 const runEmbeddedPiAgentMock = vi.fn();
@@ -71,6 +71,10 @@ afterEach(() => {
 });
 
 describe("getReplyFromConfig typing (heartbeat)", () => {
+  beforeEach(() => {
+    vi.stubEnv("OPENCLAW_TEST_FAST", "1");
+  });
+
   it("starts typing for normal runs", async () => {
     await withTempHome(async (home) => {
       runEmbeddedPiAgentMock.mockResolvedValueOnce({
diff --git a/src/auto-reply/reply.raw-body.test.ts b/src/auto-reply/reply.raw-body.test.ts
index 1d5fe51b5..1804b204d 100644
--- a/src/auto-reply/reply.raw-body.test.ts
+++ b/src/auto-reply/reply.raw-body.test.ts
@@ -102,6 +102,7 @@ describe("RawBody directive parsing", () => {
   });
 
   beforeEach(() => {
+    vi.stubEnv("OPENCLAW_TEST_FAST", "1");
     agentMocks.runEmbeddedPiAgent.mockReset();
     agentMocks.loadModelCatalog.mockReset();
     agentMocks.loadModelCatalog.mockResolvedValue([
diff --git a/src/cron/isolated-agent.delivers-response-has-heartbeat-ok-but-includes.test.ts b/src/cron/isolated-agent.delivers-response-has-heartbeat-ok-but-includes.test.ts
index 92d191687..e3d915cde 100644
--- a/src/cron/isolated-agent.delivers-response-has-heartbeat-ok-but-includes.test.ts
+++ b/src/cron/isolated-agent.delivers-response-has-heartbeat-ok-but-includes.test.ts
@@ -102,6 +102,7 @@ describe("runCronIsolatedAgentTurn", () => {
   });
 
   beforeEach(() => {
+    vi.stubEnv("OPENCLAW_TEST_FAST", "1");
     vi.mocked(runEmbeddedPiAgent).mockReset();
     vi.mocked(loadModelCatalog).mockResolvedValue([]);
     vi.mocked(runSubagentAnnounceFlow).mockReset().mockResolvedValue(true);