diff --git a/client/src/components/Studio/StudioLayersPanel.test.tsx b/client/src/components/Studio/StudioLayersPanel.test.tsx
index b16319c33..2d55463ce 100644
--- a/client/src/components/Studio/StudioLayersPanel.test.tsx
+++ b/client/src/components/Studio/StudioLayersPanel.test.tsx
@@ -141,8 +141,8 @@ describe('the layers panel', () => {
   });
 
   it('groups and ungroups the selection from its foot, and says when the page is empty', () => {
-    render(<StudioLayersPanel t={t} />);
     store().select(['a', 't']);
+    render(<StudioLayersPanel t={t} />);
     fireEvent.click(screen.getByText('journey.studio.layers.groupAction'));
     expect(el('a').group).toBeDefined();
     fireEvent.click(screen.getByText('journey.studio.layers.ungroup'));
diff --git a/client/tests/unit/studio/useBookStore.test.tsx b/client/tests/unit/studio/useBookStore.test.tsx
index bb6d4947b..1a7e87a98 100644
--- a/client/tests/unit/studio/useBookStore.test.tsx
+++ b/client/tests/unit/studio/useBookStore.test.tsx
@@ -1,6 +1,7 @@
 import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest'
 import { act, renderHook } from '@testing-library/react'
 import type { BookDocument, BookRecord } from '@trek/shared'
+import { BOOK_SCHEMA_REV } from '@trek/shared'
 
 /**
  * Autosaving a Studio book (#1973).
@@ -852,12 +853,14 @@ describe('a book a newer Studio saved', () => {
   })
 
   /* A book of today goes out exactly as it went out before the revision existed. */
-  it('FE-STUDIO-REV-006: sends a book of today without a revision in it', async () => {
+  it('FE-STUDIO-REV-006: stamps a book with the revision this Studio writes, and none while that is 1', async () => {
     const { result } = await mount()
 
     act(() => { result.current.queueSave(doc('a'), 'T') })
     await tick()
 
-    expect(api.saveBook.mock.calls[0][1].document).not.toHaveProperty('schemaRev')
+    const sent = api.saveBook.mock.calls[0][1].document
+    if (BOOK_SCHEMA_REV > 1) expect(sent.schemaRev).toBe(BOOK_SCHEMA_REV)
+    else expect(sent).not.toHaveProperty('schemaRev')
   })
 })
diff --git a/server/tests/unit/nest/journey-book.service.test.ts b/server/tests/unit/nest/journey-book.service.test.ts
index 6fb03b81b..0aaff3580 100644
--- a/server/tests/unit/nest/journey-book.service.test.ts
+++ b/server/tests/unit/nest/journey-book.service.test.ts
@@ -566,7 +566,12 @@ describe('editBook', () => {
 
     const [tool, studio] = await Promise.all([
       catchDomainError(() => books.editBook(journey.id, user.id, edited('tool'), { expectedVersion: 1 })),
-      books.saveBook(journey.id, user.id, { title: 'T', document: doc('studio'), baseVersion: 1 }),
+      // The Studio stamps what it saves with its revision, as the book tools do (useBookStore).
+      books.saveBook(journey.id, user.id, {
+        title: 'T',
+        document: { ...doc('studio'), schemaRev: BOOK_SCHEMA_REV },
+        baseVersion: 1,
+      }),
     ]);
 
     const toolLost = tool instanceof DomainError && tool.getStatus() === 409;