diff --git a/packages/acp-server/test/e2e-turn.test.ts b/packages/acp-server/test/e2e-turn.test.ts
index db4c1e93745..a23b264c501 100644
--- a/packages/acp-server/test/e2e-turn.test.ts
+++ b/packages/acp-server/test/e2e-turn.test.ts
@@ -29,6 +29,21 @@ const STDIO_MCP_FIXTURE = fileURLToPath(
   new URL('../../agent-core-v2/test/mcpCore/fixtures/mock-stdio-server.mjs', import.meta.url),
 );
 
+/**
+ * Best-effort recursive removal of a test's temp home dir. `fs.rm`'s
+ * recursive cleanup can transiently ENOTEMPTY/EBUSY right after a file
+ * handle (or, for the MCP-fixture tests, a child process pipe) in the
+ * directory closes but the OS hasn't fully released the deletion yet.
+ * Retry with Node's own linear-backoff defaults. Always returns `undefined`
+ * so call sites can just reassign: `homeDir = await cleanupHomeDir(homeDir);`.
+ */
+async function cleanupHomeDir(homeDir: string | undefined): Promise<string | undefined> {
+  if (homeDir !== undefined) {
+    await rm(homeDir, { recursive: true, force: true, maxRetries: 5, retryDelay: 100 });
+  }
+  return undefined;
+}
+
 describe('acp-server real prompt turn (scripted LLM)', () => {
   let homeDir: string | undefined;
   let client: TestClient | undefined;
@@ -39,10 +54,8 @@ describe('acp-server real prompt turn (scripted LLM)', () => {
       await client.close();
       client = undefined;
     }
-    if (homeDir !== undefined) {
-      await rm(homeDir, { recursive: true, force: true, maxRetries: 5, retryDelay: 100 });
-      homeDir = undefined;
-    }
+
+    homeDir = await cleanupHomeDir(homeDir);
   });
 
   function installTerminalClient(c: TestClient): void {
@@ -578,10 +591,8 @@ describe('acp-server prompt error hygiene', () => {
       await client.close();
       client = undefined;
     }
-    if (homeDir !== undefined) {
-      await rm(homeDir, { recursive: true, force: true, maxRetries: 5, retryDelay: 100 });
-      homeDir = undefined;
-    }
+
+    homeDir = await cleanupHomeDir(homeDir);
   });
 
   it('a launch failure settles as a fixed internalError and never leaks the engine message', async () => {
@@ -625,10 +636,8 @@ describe('acp-server builtin slash commands (local execution, no LLM turn)', ()
       await client.close();
       client = undefined;
     }
-    if (homeDir !== undefined) {
-      await rm(homeDir, { recursive: true, force: true, maxRetries: 5, retryDelay: 100 });
-      homeDir = undefined;
-    }
+
+    homeDir = await cleanupHomeDir(homeDir);
   });
 
   async function boot(): Promise<TestClient> {
@@ -842,10 +851,8 @@ describe('acp-server terminal reverse-RPC (clientCapabilities.terminal)', () =>
       await client.close();
       client = undefined;
     }
-    if (homeDir !== undefined) {
-      await rm(homeDir, { recursive: true, force: true, maxRetries: 5, retryDelay: 100 });
-      homeDir = undefined;
-    }
+
+    homeDir = await cleanupHomeDir(homeDir);
   });
 
   interface FakeTerminal {
diff --git a/packages/agent-core-v2/test/app/config/configManifest.test.ts b/packages/agent-core-v2/test/app/config/configManifest.test.ts
index b8a92c2ee57..97002d93aa0 100644
--- a/packages/agent-core-v2/test/app/config/configManifest.test.ts
+++ b/packages/agent-core-v2/test/app/config/configManifest.test.ts
@@ -8,5 +8,5 @@ describe('config manifest', () => {
     const expected = await buildConfigManifest();
     const actual = readFileSync(MANIFEST_PATH, 'utf-8');
     expect(actual).toBe(expected);
-  }, 60_000);
+  }, 120_000);
 });
diff --git a/packages/agent-core-v2/test/wire/wireManifest.test.ts b/packages/agent-core-v2/test/wire/wireManifest.test.ts
index 8013c58f2ec..c323943b1de 100644
--- a/packages/agent-core-v2/test/wire/wireManifest.test.ts
+++ b/packages/agent-core-v2/test/wire/wireManifest.test.ts
@@ -9,7 +9,7 @@ describe('wire manifest', () => {
     const expected = await buildWireManifest();
     const actual = readFileSync(MANIFEST_PATH, 'utf-8');
     expect(actual).toBe(expected);
-  }, 60_000);
+  }, 120_000);
 
   it('docs/wire-manifest.d.ts parses as TypeScript', () => {
     const project = new Project({ useInMemoryFileSystem: true });