diff --git a/docs/concepts/qa-e2e-automation.md b/docs/concepts/qa-e2e-automation.md
index 6f678f3dfe0..83dda8ece41 100644
--- a/docs/concepts/qa-e2e-automation.md
+++ b/docs/concepts/qa-e2e-automation.md
@@ -63,8 +63,9 @@ inside the guest, runs `qa suite`, then copies the normal QA report and
 summary back into `.artifacts/qa-e2e/...` on the host.
 It reuses the same scenario-selection behavior as `qa suite` on the host.
 Host and Multipass suite runs execute multiple selected scenarios in parallel
-with isolated gateway workers by default. Use `--concurrency <count>` to tune
-the worker count, or `--concurrency 1` for serial execution.
+with isolated gateway workers by default, up to 64 workers or the selected
+scenario count. Use `--concurrency <count>` to tune the worker count, or
+`--concurrency 1` for serial execution.
 Live runs forward the supported QA auth inputs that are practical for the
 guest: env-based provider keys, the QA live provider config path, and
 `CODEX_HOME` when present. Keep `--output-dir` under the repo root so the guest
diff --git a/docs/help/testing.md b/docs/help/testing.md
index d8c9f58ed49..072fa368f36 100644
--- a/docs/help/testing.md
+++ b/docs/help/testing.md
@@ -49,8 +49,9 @@ These commands sit beside the main test suites when you need QA-lab realism:
 - `pnpm openclaw qa suite`
   - Runs repo-backed QA scenarios directly on the host.
   - Runs multiple selected scenarios in parallel by default with isolated
-    gateway workers. Use `--concurrency <count>` to tune the worker count, or
-    `--concurrency 1` for the older serial lane.
+    gateway workers, up to 64 workers or the selected scenario count. Use
+    `--concurrency <count>` to tune the worker count, or `--concurrency 1` for
+    the older serial lane.
 - `pnpm openclaw qa suite --runner multipass`
   - Runs the same QA suite inside a disposable Multipass Linux VM.
   - Keeps the same scenario-selection behavior as `qa suite` on the host.
diff --git a/extensions/qa-lab/src/suite.test.ts b/extensions/qa-lab/src/suite.test.ts
index 87432150a55..1300d4c1c92 100644
--- a/extensions/qa-lab/src/suite.test.ts
+++ b/extensions/qa-lab/src/suite.test.ts
@@ -7,7 +7,8 @@ describe("qa suite failure reply handling", () => {
     const previous = process.env.OPENCLAW_QA_SUITE_CONCURRENCY;
     delete process.env.OPENCLAW_QA_SUITE_CONCURRENCY;
     try {
-      expect(qaSuiteTesting.normalizeQaSuiteConcurrency(undefined, 10)).toBe(4);
+      expect(qaSuiteTesting.normalizeQaSuiteConcurrency(undefined, 10)).toBe(10);
+      expect(qaSuiteTesting.normalizeQaSuiteConcurrency(undefined, 80)).toBe(64);
       expect(qaSuiteTesting.normalizeQaSuiteConcurrency(2.8, 10)).toBe(2);
       expect(qaSuiteTesting.normalizeQaSuiteConcurrency(20, 3)).toBe(3);
       expect(qaSuiteTesting.normalizeQaSuiteConcurrency(0, 3)).toBe(1);
@@ -35,6 +36,24 @@ describe("qa suite failure reply handling", () => {
     expect(result).toEqual([10, 20, 30, 40]);
   });
 
+  it("reads retry-after from the primary gateway error before appended logs", () => {
+    const error = new Error(
+      "rate limit exceeded for config.patch; retry after 38s\nGateway logs:\nprevious config changed since last load",
+    );
+
+    expect(qaSuiteTesting.getGatewayRetryAfterMs(error)).toBe(38_000);
+    expect(qaSuiteTesting.isConfigHashConflict(error)).toBe(false);
+  });
+
+  it("ignores stale retry-after text that only appears in appended gateway logs", () => {
+    const error = new Error(
+      "config changed since last load; re-run config.get and retry\nGateway logs:\nold rate limit exceeded for config.patch; retry after 38s",
+    );
+
+    expect(qaSuiteTesting.getGatewayRetryAfterMs(error)).toBe(null);
+    expect(qaSuiteTesting.isConfigHashConflict(error)).toBe(true);
+  });
+
   it("detects classified failure replies before a success-only outbound predicate matches", async () => {
     const state = createQaBusState();
     state.addOutboundMessage({
diff --git a/extensions/qa-lab/src/suite.ts b/extensions/qa-lab/src/suite.ts
index 362ce82d72c..58cc70c1864 100644
--- a/extensions/qa-lab/src/suite.ts
+++ b/extensions/qa-lab/src/suite.ts
@@ -135,7 +135,7 @@ type QaRawSessionStoreEntry = {
   updatedAt?: number;
 };
 
-const DEFAULT_QA_SUITE_CONCURRENCY = 4;
+const DEFAULT_QA_SUITE_CONCURRENCY = 64;
 
 function normalizeQaSuiteConcurrency(value: number | undefined, scenarioCount: number) {
   const envValue = Number(process.env.OPENCLAW_QA_SUITE_CONCURRENCY);