diff --git a/tests/unit/scaler.test.ts b/tests/unit/scaler.test.ts
index 472ac31..7aca3b5 100644
--- a/tests/unit/scaler.test.ts
+++ b/tests/unit/scaler.test.ts
@@ -41,4 +41,15 @@ describe('scaleIngredients', () => {
     const scaled = scaleIngredients([mk(100, 'g', 'Butter')], 1 / 3);
     expect(scaled[0].quantity).toBe(33);
   });
+
+  it('preserves section_heading through scaling', () => {
+    const input: Ingredient[] = [
+      { position: 1, quantity: 200, unit: 'g', name: 'Mehl', note: null, raw_text: '200 g Mehl', section_heading: 'Teig' },
+      { position: 2, quantity: null, unit: null, name: 'Ei', note: null, raw_text: 'Ei', section_heading: null }
+    ];
+    const scaled = scaleIngredients(input, 2);
+    expect(scaled[0].section_heading).toBe('Teig');
+    expect(scaled[1].section_heading).toBeNull();
+    expect(scaled[0].quantity).toBe(400);
+  });
 });