diff --git a/tests/README.md b/tests/README.md
index 0c1eed2..566a6fd 100644
--- a/tests/README.md
+++ b/tests/README.md
@@ -21,4 +21,4 @@ npm run e2e                    # casos de datos: Excel→gráfico y carpetas vig
 Las carpetas del test son **OPFS** (los pickers nativos exigen gesto de
 usuario); los handles se registran en el IndexedDB de Elffuss igual que los
 reales. Esto valida la plataforma — la calidad del modelo se evalúa con los
-casos de `../coordinacion/ERRORES.md`.
+casos de prueba.
diff --git a/tests/acceptance/6/CRITERIA.json b/tests/acceptance/6/CRITERIA.json
new file mode 100644
index 0000000..5b8374f
--- /dev/null
+++ b/tests/acceptance/6/CRITERIA.json
@@ -0,0 +1,12 @@
+{
+  "schema": "elffuss-t2t/criteria@2",
+  "issue": 6,
+  "criteria": [
+    {
+      "index": 1,
+      "tests": [
+        "tests/acceptance/6/criteria.test.js::criterion 1"
+      ]
+    }
+  ]
+}
diff --git a/tests/acceptance/6/criteria.test.js b/tests/acceptance/6/criteria.test.js
new file mode 100644
index 0000000..a25726f
--- /dev/null
+++ b/tests/acceptance/6/criteria.test.js
@@ -0,0 +1,10 @@
+import { test } from 'node:test'
+import assert from 'node:assert/strict'
+import { readFileSync } from 'node:fs'
+const text = readFileSync(new URL('../../../tests/README.md', import.meta.url), 'utf8') // the content of tests/README.md
+
+test('criterion 1', () => {
+  // tests/README.md contains no reference to `coordinacion/` and still states that the test folders are OPFS folders.
+  assert.strictEqual(text.includes('coordinacion/'), false)
+  assert.strictEqual(text.includes('OPFS'), true)
+})