diff --git a/harness/tests/grouped.spec.js b/harness/tests/grouped.spec.js
index a5fbd8df..55295ca5 100644
--- a/harness/tests/grouped.spec.js
+++ b/harness/tests/grouped.spec.js
@@ -146,18 +146,21 @@ test.describe("a grouped, multi-level document", () => {
     expect(await groupRows.locator("td").count()).toBe(0);
     await expect(groupRows.first().locator("th")).toHaveCount(1);
 
-    // The collapse is the document's, and it must have REMOVED rows: Upland's
-    // two regions are absent while Inland's two are here. Without this, a
-    // page that drew the indicator and ignored the frame would pass.
+    // The collapse is the document's: Upland's two regions are gone and the
+    // group is ONE row in their place (improvise-6qet, core.md §14).
     const labels = await page.locator("#grid tbody tr th[scope=row]").allTextContents();
     expect(labels).toContain("East");
     expect(labels).toContain("West");
+    expect(labels).toContain("Upland");
     expect(labels).not.toContain("Ridge");
     expect(labels).not.toContain("Valley");
-    // 4 regions visible x 2 stores. Stated as a count as well, because a row
-    // drawn with empty labels would satisfy the four assertions above.
-    await expect(page.locator("#grid tbody tr").filter({ hasNot: page.locator("th.group") })).toHaveCount(
-      8,
-    );
+    // (4 regions + the Upland fold) x 2 stores. A count too, because a row
+    // drawn with empty labels would satisfy the assertions above.
+    const dataRows = page.locator("#grid tbody tr").filter({ hasNot: page.locator("th.group") });
+    await expect(dataRows).toHaveCount(10);
+    // The fold is an aggregate: no record carries Region=Upland, so nothing
+    // in its rows may open an editor, where a stored row beside it does.
+    await expect(dataRows.first().locator("td.editable")).not.toHaveCount(0);
+    await expect(dataRows.last().locator("td.editable")).toHaveCount(0);
   });
 });