diff --git a/packages/acp-server/test/e2e-turn.test.ts b/packages/acp-server/test/e2e-turn.test.ts
index b14a327e45..0be8fecdc3 100644
--- a/packages/acp-server/test/e2e-turn.test.ts
+++ b/packages/acp-server/test/e2e-turn.test.ts
@@ -28,6 +28,21 @@ 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;
@@ -38,10 +53,8 @@ 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);
   });
 
   async function boot(clientCapabilities: Record<string, unknown> = {}): Promise<TestClient> {
@@ -561,10 +574,8 @@ 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 () => {
@@ -608,10 +619,8 @@ 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> {
@@ -825,10 +834,8 @@ 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 72f798725b..7e0a076e13 100644
--- a/packages/agent-core-v2/test/app/config/configManifest.test.ts
+++ b/packages/agent-core-v2/test/app/config/configManifest.test.ts
@@ -16,5 +16,5 @@ 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/lint/op-uniqueness.test.ts b/packages/agent-core-v2/test/lint/op-uniqueness.test.ts
index 1637513369..73fe23eb9e 100644
--- a/packages/agent-core-v2/test/lint/op-uniqueness.test.ts
+++ b/packages/agent-core-v2/test/lint/op-uniqueness.test.ts
@@ -1,3 +1,12 @@
+/**
+ * Scenario: no wire Op type registered via `defineOp` is duplicated across
+ * `src/`, and a runtime duplicate registration throws `DuplicateOpError`.
+ *
+ * The full-`src/`-scan test below does a synchronous, full-tree file read,
+ * which can exceed the default timeout under slow bind-mounted filesystems
+ * (e.g. Docker on Windows) — hence its extended timeout.
+ */
+
 import { readdirSync, readFileSync, statSync } from 'node:fs';
 import { dirname, join } from 'node:path';
 import { fileURLToPath } from 'node:url';
@@ -179,10 +188,14 @@ describe('op-uniqueness', () => {
     }
   });
 
-  it('finds no duplicate defineOp types across src/', () => {
-    const seen = scanDefineOpTypes(SRC_ROOT);
-    expect(duplicates(seen)).toEqual(new Map());
-  });
+  it(
+    'finds no duplicate defineOp types across src/',
+    () => {
+      const seen = scanDefineOpTypes(SRC_ROOT);
+      expect(duplicates(seen)).toEqual(new Map());
+    },
+    20_000,
+  );
 
   it('flags the planted duplicate in the fixture', () => {
     const seen = scanDefineOpTypes(FIXTURE_ROOT);
diff --git a/packages/agent-core-v2/test/lint/vendor-name-gates.test.ts b/packages/agent-core-v2/test/lint/vendor-name-gates.test.ts
index 38ecf5722e..aead381ab6 100644
--- a/packages/agent-core-v2/test/lint/vendor-name-gates.test.ts
+++ b/packages/agent-core-v2/test/lint/vendor-name-gates.test.ts
@@ -13,6 +13,10 @@
  * Brand/env names (`KIMI_CODE_*`, `KIMI_MODEL_*`) and `'kimi'` as data
  * (config values, telemetry fields, registration ids) do not match the
  * patterns — verified against the whole `src/` tree.
+ *
+ * The full-`src/`-scan test below does a synchronous, full-tree file read,
+ * which can exceed the default timeout under slow bind-mounted filesystems
+ * (e.g. Docker on Windows) — hence its extended timeout.
  */
 
 import { readdirSync, readFileSync, statSync } from 'node:fs';
@@ -95,13 +99,17 @@ describe('vendor-name gates', () => {
     expect(hits).toEqual([]);
   });
 
-  it('finds no vendor-name gates in src/ outside kosong', () => {
-    const hits = walk(SRC_ROOT).flatMap((file) =>
-      findVendorGates(readFileSync(file, 'utf8'), relative(SRC_ROOT, file)),
-    );
-    expect(
-      hits.map((hit) => `${hit.file}:${hit.line} ${hit.text}`),
-      'vendor-name gate found outside kosong — ask the provider-definition / adapter registries instead',
-    ).toEqual([]);
-  });
+  it(
+    'finds no vendor-name gates in src/ outside kosong',
+    () => {
+      const hits = walk(SRC_ROOT).flatMap((file) =>
+        findVendorGates(readFileSync(file, 'utf8'), relative(SRC_ROOT, file)),
+      );
+      expect(
+        hits.map((hit) => `${hit.file}:${hit.line} ${hit.text}`),
+        'vendor-name gate found outside kosong — ask the provider-definition / adapter registries instead',
+      ).toEqual([]);
+    },
+    20_000,
+  );
 });
diff --git a/packages/agent-core-v2/test/tool/tool.test.ts b/packages/agent-core-v2/test/tool/tool.test.ts
index 14709c15a2..178ee94173 100644
--- a/packages/agent-core-v2/test/tool/tool.test.ts
+++ b/packages/agent-core-v2/test/tool/tool.test.ts
@@ -1,3 +1,11 @@
+/**
+ * Agent tool execution contract tests.
+ *
+ * The background-subagent-spawn scenario below uses pure in-memory stubs,
+ * but this file's worker can be CPU-starved under parallel load in
+ * resource-constrained containers, hence its extended timeout.
+ */
+
 import { mkdtempSync, readFileSync, rmSync } from 'node:fs';
 import { tmpdir } from 'node:os';
 import { join } from 'node:path';
@@ -1099,7 +1107,7 @@ describe('Agent tool execution contract', () => {
     expect(result.output).toContain('agent_id: agent-child');
     expect(result.output).toContain('actual_subagent_type: explore');
     expect(result.output).toContain('child result');
-  });
+  }, 15_000);
 
   it('spawns the subagent on the configured secondary model by default', async () => {
     const lifecycle = createAgentLifecycleStub({ createAgentIds: ['agent-child'] });
diff --git a/packages/agent-core-v2/test/wire/wireManifest.test.ts b/packages/agent-core-v2/test/wire/wireManifest.test.ts
index 4ec0429ba9..a21af6a53a 100644
--- a/packages/agent-core-v2/test/wire/wireManifest.test.ts
+++ b/packages/agent-core-v2/test/wire/wireManifest.test.ts
@@ -18,7 +18,7 @@ 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 });
diff --git a/packages/agent-core-v2/test/workspace/workspaceResources.test.ts b/packages/agent-core-v2/test/workspace/workspaceResources.test.ts
index ede234fc43..2d8d8c3671 100644
--- a/packages/agent-core-v2/test/workspace/workspaceResources.test.ts
+++ b/packages/agent-core-v2/test/workspace/workspaceResources.test.ts
@@ -263,7 +263,9 @@ describe('workspace resource sharing (handler chain)', () => {
   afterEach(async () => {
     host?.dispose();
     host = undefined;
-    await Promise.all(tmpRoots.map((root) => rm(root, { recursive: true, force: true })));
+    await Promise.all(
+      tmpRoots.map((root) => rm(root, { recursive: true, force: true, maxRetries: 3, retryDelay: 10 })),
+    );
   });
 
   async function makeRoot(prefix: string): Promise<string> {