diff --git a/extensions/qa-lab/src/suite-runtime-gateway.test.ts b/extensions/qa-lab/src/suite-runtime-gateway.test.ts
index 38e50e15da21..17dd9c07d1e0 100644
--- a/extensions/qa-lab/src/suite-runtime-gateway.test.ts
+++ b/extensions/qa-lab/src/suite-runtime-gateway.test.ts
@@ -238,7 +238,7 @@ describe("qa suite gateway helpers", () => {
     });
     const waitReady = vi.fn(async () => {});
 
-    await waitForConfigRestartSettle(createRestartSettleEnv(waitReady), 0, 1_000);
+    await waitForConfigRestartSettle(createRestartSettleEnv(waitReady), 0, 3_000);
 
     expect(fetchWithSsrFGuardMock).toHaveBeenCalledWith(
       expect.objectContaining({
diff --git a/scripts/test-extension-batch.mjs b/scripts/test-extension-batch.mjs
index a6dc485a113b..ca305f7518bb 100644
--- a/scripts/test-extension-batch.mjs
+++ b/scripts/test-extension-batch.mjs
@@ -10,6 +10,12 @@ import { isDirectScriptRun, runVitestBatch } from "./lib/vitest-batch-runner.mjs
 const FS_MODULE_CACHE_PATH_ENV_KEY = "OPENCLAW_VITEST_FS_MODULE_CACHE_PATH";
 const PARALLEL_ENV_KEY = "OPENCLAW_EXTENSION_BATCH_PARALLEL";
 const TARGET_CHUNK_SIZE_ENV_KEY = "OPENCLAW_EXTENSION_BATCH_TARGET_CHUNK_SIZE";
+const MEMORY_VITEST_CONFIG = "test/vitest/vitest.extension-memory.config.ts";
+const MEMORY_TARGET_CHUNK_SIZE = 25;
+const MEMORY_ISOLATED_TARGETS = new Set([
+  "extensions/memory-core/src/memory/manager-embedding-timeout.test.ts",
+  "extensions/memory-core/src/memory/qmd-manager.test.ts",
+]);
 const TELEGRAM_VITEST_CONFIG = "test/vitest/vitest.extension-telegram.config.ts";
 const TELEGRAM_TARGET_CHUNK_SIZE = 40;
 const ALLOW_NO_TESTS_FLAG = "--allow-no-tests";
@@ -151,17 +157,36 @@ function resolveGroupTargetChunkSize(group, env) {
   if (override !== null) {
     return override;
   }
+  if (group.config === MEMORY_VITEST_CONFIG) {
+    return MEMORY_TARGET_CHUNK_SIZE;
+  }
   return group.config === TELEGRAM_VITEST_CONFIG ? TELEGRAM_TARGET_CHUNK_SIZE : null;
 }
 
-function chunkTargets(targets, chunkSize) {
+function chunkTargets(targets, chunkSize, isolatedTargets = new Set()) {
   if (!chunkSize || targets.length <= chunkSize) {
     return [targets];
   }
   const chunks = [];
-  for (let index = 0; index < targets.length; index += chunkSize) {
-    chunks.push(targets.slice(index, index + chunkSize));
+  let currentChunk = [];
+  const flushCurrentChunk = () => {
+    if (currentChunk.length > 0) {
+      chunks.push(currentChunk);
+      currentChunk = [];
+    }
+  };
+  for (const target of targets) {
+    if (isolatedTargets.has(target)) {
+      flushCurrentChunk();
+      chunks.push([target]);
+      continue;
+    }
+    currentChunk.push(target);
+    if (currentChunk.length >= chunkSize) {
+      flushCurrentChunk();
+    }
   }
+  flushCurrentChunk();
   return chunks;
 }
 
@@ -176,7 +201,9 @@ async function runPlanGroup(group, params) {
   console.log(
     `[test-extension-batch] ${group.config}: ${group.extensionIds.join(", ")} (${targets.length} targets)`,
   );
-  const targetChunks = chunkTargets(targets, targetChunkSize);
+  const isolatedTargets =
+    group.config === MEMORY_VITEST_CONFIG ? MEMORY_ISOLATED_TARGETS : new Set();
+  const targetChunks = chunkTargets(targets, targetChunkSize, isolatedTargets);
   for (const [index, chunk] of targetChunks.entries()) {
     if (targetChunks.length > 1) {
       console.log(
diff --git a/test/scripts/test-extension.test.ts b/test/scripts/test-extension.test.ts
index 7d25e8bad83a..1a79eeee6fe8 100644
--- a/test/scripts/test-extension.test.ts
+++ b/test/scripts/test-extension.test.ts
@@ -710,6 +710,40 @@ describe("scripts/test-extension.mjs", () => {
     expect(runGroup.mock.calls.map(([params]) => params.targets.length)).toEqual([50, 50, 25]);
   });
 
+  it("chunks memory extension batch groups by default", async () => {
+    const runGroup = vi.fn<() => Promise<number>>().mockResolvedValue(0);
+    const result = await runExtensionBatchPlan(
+      {
+        extensionCount: 2,
+        extensionIds: ["memory-core", "memory-lancedb"],
+        estimatedCost: 64,
+        hasTests: true,
+        planGroups: [
+          {
+            config: "test/vitest/vitest.extension-memory.config.ts",
+            estimatedCost: 64,
+            extensionIds: ["memory-core", "memory-lancedb"],
+            roots: [bundledPluginRoot("memory-core"), bundledPluginRoot("memory-lancedb")],
+            testFileCount: 64,
+          },
+        ],
+        testFileCount: 64,
+      },
+      { runGroup },
+    );
+
+    expect(result).toBe(0);
+    expect(
+      runGroup.mock.calls.map(([params]) => params.targets.length).reduce((a, b) => a + b, 0),
+    ).toBe(64);
+    expect(runGroup.mock.calls.map(([params]) => params.targets)).toContainEqual([
+      bundledPluginFile("memory-core", "src/memory/manager-embedding-timeout.test.ts"),
+    ]);
+    expect(runGroup.mock.calls.map(([params]) => params.targets)).toContainEqual([
+      bundledPluginFile("memory-core", "src/memory/qmd-manager.test.ts"),
+    ]);
+  });
+
   it("fails extension batch groups when exact excludes remove every test", async () => {
     const runGroup = vi.fn<() => Promise<number>>().mockResolvedValue(0);
     const result = await runExtensionBatchPlan(