diff --git a/frontend/src/lib/hooks/__tests__/useBlockAutoSave.svelte.test.ts b/frontend/src/lib/hooks/__tests__/useBlockAutoSave.svelte.test.ts
index 93806949..f6a87a8f 100644
--- a/frontend/src/lib/hooks/__tests__/useBlockAutoSave.svelte.test.ts
+++ b/frontend/src/lib/hooks/__tests__/useBlockAutoSave.svelte.test.ts
@@ -72,8 +72,11 @@ describe('createBlockAutoSave', () => {
 	});
 
 	it('preserves the in-flight text + mentionedPersons across a save failure (B12)', async () => {
+		// Hold the second saveFn so we can observe the saving→saved transition
+		// (Tester #5506 §5).
+		let resolveSecond!: () => void;
 		mockSaveFn.mockRejectedValueOnce(new Error('boom'));
-		mockSaveFn.mockResolvedValueOnce(undefined);
+		mockSaveFn.mockReturnValueOnce(new Promise<void>((r) => (resolveSecond = r)));
 		const as = createBlockAutoSave({ saveFn: mockSaveFn, documentId: 'doc-1' });
 
 		const mentions: PersonMention[] = [{ personId: 'p-aug', displayName: 'Auguste Raddatz' }];
@@ -82,8 +85,14 @@ describe('createBlockAutoSave', () => {
 		expect(as.getSaveState('block-1')).toBe('error');
 
 		// Retry without re-passing the data — the hook resends the preserved payload.
-		await as.handleRetry('block-1', 'should-not-be-used', []);
+		const retryPromise = as.handleRetry('block-1', 'should-not-be-used', []);
+		// Yield once so executeSave runs synchronously up to the saveFn await.
+		await Promise.resolve();
+		expect(as.getSaveState('block-1')).toBe('saving');
 		expect(mockSaveFn).toHaveBeenLastCalledWith('block-1', '@Auguste Raddatz hi', mentions);
+
+		resolveSecond();
+		await retryPromise;
 		expect(as.getSaveState('block-1')).toBe('saved');
 	});