diff --git a/make_post_sell/tests/test_functional.py b/make_post_sell/tests/test_functional.py
index 3322429..cfadbf9 100644
--- a/make_post_sell/tests/test_functional.py
+++ b/make_post_sell/tests/test_functional.py
@@ -4430,3 +4430,127 @@ class TestAnalytics(_AuthenticatedBase):
         # Now data-has-bucket="1" should be present
         res = self.testapp.get(f"/s/{shop.id}/{shop.slug}", status=200)
         self.assertIn('data-has-bucket="1"', res.text)
+
+
+class TestGiftCardFunctional(_AuthenticatedBase):
+    """Functional tests for gift card features."""
+
+    def _enable_gift_cards(self, shop, min_dollars="5.00", max_dollars="250.00"):
+        """Helper to enable gift cards on a shop via settings POST."""
+        res = self.testapp.post(
+            f"/s/{shop.id}/settings",
+            {
+                "form_section": "gift-card-settings",
+                "gift-card-enabled-checkbox": "on",
+                "gift_card_min": min_dollars,
+                "gift_card_max": max_dollars,
+                "submit": "Save Settings",
+            },
+            status=302,
+        )
+        return res
+
+    def test_gift_card_page_not_enabled(self):
+        """Gift card page redirects when gift cards are disabled (default)."""
+        shop = self._create_shop_helper()
+        # Gift cards are disabled by default, so GET should redirect
+        res = self.testapp.get(f"/s/{shop.id}/gift-card", status=302)
+
+    def test_gift_card_enable_settings(self):
+        """Enable gift cards via shop settings and verify DB state."""
+        shop = self._create_shop_helper()
+
+        res = self.testapp.post(
+            f"/s/{shop.id}/settings",
+            {
+                "form_section": "gift-card-settings",
+                "gift-card-enabled-checkbox": "on",
+                "gift_card_min": "5.00",
+                "gift_card_max": "250.00",
+                "submit": "Save Settings",
+            },
+            status=302,
+        )
+        res = res.follow()
+        flash = self._get_flash_messages(res)
+        self.assertIn("Gift cards enabled", flash)
+
+        self.dbsession.refresh(shop)
+        self.assertTrue(shop.gift_card_enabled)
+        self.assertEqual(shop.gift_card_min_in_cents, 500)
+        self.assertEqual(shop.gift_card_max_in_cents, 25000)
+
+    def test_gift_card_page_enabled(self):
+        """Gift card page returns 200 when gift cards are enabled."""
+        shop = self._create_shop_helper()
+        self._enable_gift_cards(shop)
+        self.dbsession.refresh(shop)
+
+        res = self.testapp.get(f"/s/{shop.id}/gift-card", status=200)
+        self.assertIn("Gift Card", res.text)
+
+    def test_gift_card_manage_page(self):
+        """Gift card manage page returns 200 for shop owner."""
+        shop = self._create_shop_helper()
+        self._enable_gift_cards(shop)
+
+        res = self.testapp.get(f"/s/{shop.id}/gift-cards/manage", status=200)
+
+    def test_gift_card_apply_invalid_code(self):
+        """Applying a nonexistent gift card code shows error flash."""
+        shop = self._create_shop_helper()
+
+        # Create a product on the shop
+        redirect_res = self.testapp.post(
+            f"/p/new?shop_id={shop.id}", self.product1_params
+        )
+        res = redirect_res.follow()
+        product = get_all_products(self.dbsession).all()[0]
+
+        # Log out shop owner, log in as customer
+        self.testapp.get("/log-out")
+        self.log_in_user(self.user2_creds)
+
+        # Add product to cart
+        csrf_token = self.get_csrf_token(shop.uuid_str)
+        self.testapp.post(
+            "/cart/add",
+            {
+                "product_id": product.id,
+                "shop_id": shop.id,
+                "csrf_token": csrf_token,
+            },
+        )
+
+        # Try to apply an invalid gift card code
+        csrf_token = self.get_csrf_token(shop.uuid_str)
+        res = self.testapp.post(
+            "/gift-card/apply",
+            {
+                "gift_card_code": "GC-DOESNOTEXIST",
+                "csrf_token": csrf_token,
+            },
+            status=302,
+        )
+        res = res.follow()
+        flash = self._get_flash_messages(res)
+        self.assertIn("does not exist", flash)
+
+    def test_gift_card_settings_validation(self):
+        """Setting min > max shows validation error."""
+        shop = self._create_shop_helper()
+
+        res = self.testapp.post(
+            f"/s/{shop.id}/settings",
+            {
+                "form_section": "gift-card-settings",
+                "gift-card-enabled-checkbox": "on",
+                "gift_card_min": "500.00",
+                "gift_card_max": "100.00",
+                "submit": "Save Settings",
+            },
+            status=302,
+        )
+        res = res.follow()
+        flash = self._get_flash_messages(res)
+        self.assertIn("Maximum must be greater than or equal to minimum", flash)