diff --git a/packages/dashboard/app/components/__tests__/TaskDetailModal.inline-editing-and-integrations.test.tsx b/packages/dashboard/app/components/__tests__/TaskDetailModal.inline-editing-and-integrations.test.tsx
index 63a2a30e39..bd38542635 100644
--- a/packages/dashboard/app/components/__tests__/TaskDetailModal.inline-editing-and-integrations.test.tsx
+++ b/packages/dashboard/app/components/__tests__/TaskDetailModal.inline-editing-and-integrations.test.tsx
@@ -17,6 +17,7 @@ import {
   mockConfirm,
   mockUsePluginUiSlots,
   expectBaseRule,
+  expectSingleStatsRuntimeStatus,
   readDashboardStylesSource,
   setupTaskDetailModalHooks,
 } from "./TaskDetailModal.test-helpers";
@@ -83,6 +84,11 @@ function getRuleBlockFromSelectorList(css: string, selector: string): string {
   return ruleEnd === -1 ? "" : css.slice(ruleStart + 1, ruleEnd);
 }
 
+/*
+FNXC:TaskDetailStatsAssertions 2026-08-09-16:50:
+FN-8906 requires Stats-tab runtime-status assertions to be scoped to the named Stats region because
+the modal header lifecycle badge intentionally renders the same raw status string.
+*/
 describe("TaskDetailModal", () => {
   describe("source issue metadata", () => {
     beforeEach(() => {
@@ -2440,7 +2446,7 @@ describe("TaskDetailModal", () => {
       expect(screen.getByText("Execution Details")).toBeInTheDocument();
       expect(screen.getByText("Loading token statistics…")).toBeDefined();
       expect(screen.getAllByText("Fast").length).toBeGreaterThan(0);
-      expect(screen.getByText("executing")).toBeInTheDocument();
+      expectSingleStatsRuntimeStatus("executing");
     });
 
     it("shows spec content after fetchTaskDetail resolves", async () => {
@@ -2529,7 +2535,7 @@ describe("TaskDetailModal", () => {
       expect(screen.getByText("Execution mode")).toBeInTheDocument();
       expect(screen.getByText("Runtime status")).toBeInTheDocument();
       expect(screen.getAllByText("Fast").length).toBeGreaterThan(0);
-      expect(screen.getByText("executing")).toBeInTheDocument();
+      expectSingleStatsRuntimeStatus("executing");
       expect(screen.getByText((1200).toLocaleString())).toBeInTheDocument();
       expect(screen.getByText((450).toLocaleString())).toBeInTheDocument();
       expect(screen.getByText((210).toLocaleString())).toBeInTheDocument();
diff --git a/packages/dashboard/app/components/__tests__/TaskDetailModal.rendering.test.tsx b/packages/dashboard/app/components/__tests__/TaskDetailModal.rendering.test.tsx
index cec943e2ee..aa259c0b91 100644
--- a/packages/dashboard/app/components/__tests__/TaskDetailModal.rendering.test.tsx
+++ b/packages/dashboard/app/components/__tests__/TaskDetailModal.rendering.test.tsx
@@ -12,7 +12,7 @@ query ambiguous once the trigger stopped being a mobile-only affordance.
 import { readFileSync } from "node:fs";
 import { resolve } from "node:path";
 import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
-import { render, screen, fireEvent, act, waitFor, cleanup, within } from "@testing-library/react";
+import { render, screen, fireEvent, act, waitFor, cleanup } from "@testing-library/react";
 
 // FNXC:Markdown 2026-06-23-03:30: Mock the heavy `mermaid` library so the shared
 // markdown pipeline's MermaidDiagram resolves without loading the real renderer.
@@ -35,6 +35,7 @@ import {
   mockConfirm,
   mockUsePluginUiSlots,
   expectBaseRule,
+  expectSingleStatsRuntimeStatus,
   readDashboardStylesSource,
   resetTaskDetailFetchMock,
   setupTaskDetailModalHooks,
@@ -45,22 +46,6 @@ import * as dashboardApi from "../../api";
 import { FileBrowserProvider } from "../../context/FileBrowserContext";
 import type { Task } from "@fusion/core";
 
-/*
-FNXC:TaskDetailOptimisticOpening 2026-08-05-07:39:
-A running task deliberately exposes its raw runtime status in two ownership regions: the modal
-header's lifecycle badge and the Stats panel's Runtime status row. Optimistic-opening assertions
-must scope the Stats claim to its named semantic region, then assert one row there and the expected
-two owned values overall; this catches a duplicated Stats panel without treating legitimate header
-context as a production rendering defect.
-*/
-function expectSingleStatsRuntimeStatus(status: string) {
-  const statsPanel = screen.getByRole("region", { name: "Task execution statistics" });
-  expect(within(statsPanel).getByText(status)).toBeInTheDocument();
-  expect(within(statsPanel).getAllByText(status)).toHaveLength(1);
-  expect(screen.getByTestId("task-detail-status-badge")).toHaveTextContent(status);
-  expect(screen.getAllByText(status)).toHaveLength(2);
-}
-
 setupTaskDetailModalHooks();
 
 describe("TaskDetailModal", () => {
diff --git a/packages/dashboard/app/components/__tests__/TaskDetailModal.test-helpers.ts b/packages/dashboard/app/components/__tests__/TaskDetailModal.test-helpers.ts
index 73e94009d4..11ca300a16 100644
--- a/packages/dashboard/app/components/__tests__/TaskDetailModal.test-helpers.ts
+++ b/packages/dashboard/app/components/__tests__/TaskDetailModal.test-helpers.ts
@@ -3,7 +3,7 @@ import { loadAllAppCss } from "../../test/cssFixture";
 import React from "react";
 import { existsSync, readFileSync } from "node:fs";
 import { resolve } from "node:path";
-import { render, screen, fireEvent, act, waitFor } from "@testing-library/react";
+import { render, screen, fireEvent, act, waitFor, within } from "@testing-library/react";
 import userEvent from "@testing-library/user-event";
 import { TaskDetailModal, TaskDetailContent } from "../TaskDetailModal";
 import type { TaskDetail, Column, MergeResult, Task } from "@fusion/core";
@@ -16,6 +16,27 @@ const taskDetailSseSubscriptions = vi.hoisted(() => [] as Array<{
 
 export { taskDetailSseSubscriptions };
 
+/*
+FNXC:TaskDetailOptimisticOpening 2026-08-05-07:39:
+A running task deliberately exposes its raw runtime status in two ownership regions: the modal
+header's lifecycle badge and the Stats panel's Runtime status row. Optimistic-opening assertions
+must scope the Stats claim to its named semantic region, then assert one row there and the expected
+two owned values overall; this catches a duplicated Stats panel without treating legitimate header
+context as a production rendering defect.
+
+FNXC:TaskDetailStatsAssertions 2026-08-09-16:50:
+FN-8906 requires every TaskDetailModal test to use this shared helper: a non-empty raw runtime
+status is owned by the header lifecycle badge and the Stats Runtime status row, so an unscoped
+getByText(status) after opening Stats is ambiguous.
+*/
+export function expectSingleStatsRuntimeStatus(status: string): void {
+  const statsPanel = screen.getByRole("region", { name: "Task execution statistics" });
+  expect(within(statsPanel).getByText(status)).toBeInTheDocument();
+  expect(within(statsPanel).getAllByText(status)).toHaveLength(1);
+  expect(screen.getByTestId("task-detail-status-badge")).toHaveTextContent(status);
+  expect(screen.getAllByText(status)).toHaveLength(2);
+}
+
 vi.mock("../../sse-bus", () => ({
   subscribeSse: vi.fn((url: string, options: { events?: Record<string, (event: MessageEvent) => void> }) => {
     taskDetailSseSubscriptions.push({ url, options });