diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 5a96047..741efaf 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -107,10 +107,17 @@ updates:
 
       # ─── Node >= 22 majors: holds lifted 2026-11-04 ──────────────────────
       # better-sqlite3, @testing-library/jest-dom and cssnano majors were held
-      # while the host toolchain was Node 20.19 (jest-dom 7 broke 43 suites;
-      # cssnano 8 calls Set.prototype.difference). The toolchain is Node 24
-      # now, so their majors arrive as ordinary Dependabot PRs again; each
-      # still has to pass `npm run ci` on its own.
+      # while the host toolchain was Node 20.19 (cssnano 8 calls
+      # Set.prototype.difference). The toolchain is Node 24 now, so their
+      # majors arrive as ordinary Dependabot PRs again; each still has to
+      # pass `npm run ci` on its own.
+      #
+      # jest-dom 7's suite breakage was NOT the Node version: it still broke
+      # 54 suites on Node 24 (#86). jest-dom 7 eagerly requires
+      # @testing-library/dom, which requires 'fs' at load, so loading it from
+      # test/test-setup.js cached the memfs `fs` mock and silently overrode
+      # every test file's own jest.mock('fs', factory). test-setup.js now
+      # loads jest-dom inside jest.isolateModules; keep it there.
       #
       # better-sqlite3 needs more than `npm run ci`: Jest never loads the
       # native module (shouldUseSqliteBackend defaults to false under Jest,
diff --git a/docs/commercial-use-inventory.json b/docs/commercial-use-inventory.json
index c4e0f09..91b2952 100644
--- a/docs/commercial-use-inventory.json
+++ b/docs/commercial-use-inventory.json
@@ -1,5 +1,5 @@
 {
-  "generatedAt": "2026-11-06T20:44:48.205Z",
+  "generatedAt": "2026-11-07T00:28:55.915Z",
   "projectLicense": {
     "riskLevel": "allowed",
     "reason": "Project license is PolyForm Noncommercial 1.0.0 for personal/noncommercial use. Commercial rights are sold separately; third-party dependency obligations remain governed by their own licenses.",
@@ -9842,7 +9842,7 @@
     },
     {
       "packageName": "@testing-library/jest-dom",
-      "version": "6.9.1",
+      "version": "7.0.1",
       "license": "MIT",
       "riskLevel": "allowed",
       "directRuntime": false,
diff --git a/package-lock.json b/package-lock.json
index b2fa31c..6e527c7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -67,7 +67,7 @@
         "@svgr/webpack": "^8.1.0",
         "@tailwindcss/postcss": "^4.3.4",
         "@testing-library/dom": "^10.4.2",
-        "@testing-library/jest-dom": "^6.9.1",
+        "@testing-library/jest-dom": "^7.0.1",
         "@testing-library/react": "^16.3.3",
         "@types/debug": "^4.1.13",
         "@types/graceful-fs": "^4.1.9",
@@ -14934,9 +14934,9 @@
       }
     },
     "node_modules/@testing-library/jest-dom": {
-      "version": "6.9.1",
-      "resolved": "https://registry.npmjs.org/@testing-library/jest-dom/-/jest-dom-6.9.1.tgz",
-      "integrity": "sha512-zIcONa+hVtVSSep9UT3jZ5rizo2BsxgyDYU7WFD5eICBE7no3881HGeb/QkGfsJs6JTkY1aQhT7rIPC7e+0nnA==",
+      "version": "7.0.1",
+      "resolved": "https://registry.npmjs.org/@testing-library/jest-dom/-/jest-dom-7.0.1.tgz",
+      "integrity": "sha512-oMDTC3oA+6CXSO2JZnvOI7CA6oVub6kij5ggk9ohwye5slmkwxYDXcPOVxgMw/RQlticjtO0C1RZkR97HgrWMw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -14948,9 +14948,18 @@
         "redent": "^3.0.0"
       },
       "engines": {
-        "node": ">=14",
+        "node": ">=22",
         "npm": ">=6",
         "yarn": ">=1"
+      },
+      "peerDependencies": {
+        "@testing-library/dom": ">=10 <11",
+        "vitest": ">= 0.32"
+      },
+      "peerDependenciesMeta": {
+        "vitest": {
+          "optional": true
+        }
       }
     },
     "node_modules/@testing-library/jest-dom/node_modules/dom-accessibility-api": {
diff --git a/package.json b/package.json
index c96be36..a87acde 100644
--- a/package.json
+++ b/package.json
@@ -259,7 +259,7 @@
     "@svgr/webpack": "^8.1.0",
     "@tailwindcss/postcss": "^4.3.4",
     "@testing-library/dom": "^10.4.2",
-    "@testing-library/jest-dom": "^6.9.1",
+    "@testing-library/jest-dom": "^7.0.1",
     "@testing-library/react": "^16.3.3",
     "@types/debug": "^4.1.13",
     "@types/graceful-fs": "^4.1.9",
diff --git a/test/test-setup.js b/test/test-setup.js
index 719bc50..fec71a9 100644
--- a/test/test-setup.js
+++ b/test/test-setup.js
@@ -4,7 +4,15 @@
  */
 
 // Import jest-dom for React Testing Library matchers (toBeInTheDocument, etc.)
-require('@testing-library/jest-dom');
+// Loaded in an isolated registry: jest-dom 7 eagerly requires
+// @testing-library/dom, which requires 'fs' at load time. Outside isolation
+// that instantiates the memfs mock below into the shared mock registry, and a
+// test file's own jest.mock('fs', factory) is then ignored (the cached memfs
+// wins), so fs.x.mockResolvedValue is undefined. expect.extend() is global,
+// so the matchers survive the isolated registry being discarded.
+jest.isolateModules(() => {
+  require('@testing-library/jest-dom');
+});
 
 const { vol, fs: memfs } = require('memfs');
 const path = require('path');