diff --git a/PediFoods/Views/Main/StoreDetailView+Components.swift b/PediFoods/Views/Main/StoreDetailView+Components.swift
index 379aa93..5044940 100644
--- a/PediFoods/Views/Main/StoreDetailView+Components.swift
+++ b/PediFoods/Views/Main/StoreDetailView+Components.swift
@@ -345,6 +345,11 @@ extension StoreDetailView {
                 .disabled(isStoreOpen == false)
                 .opacity(isStoreOpen ? 1 : 0.65)
                 .offset(x: 7, y: 7)
+                // Explicit, unique identifier for UI tests - the inner
+                // "plus" SF Symbol's implicit/auto-generated identifier is
+                // ambiguous (the same systemName is reused for CartView's
+                // quantity stepper) and unreliable to match against.
+                .accessibilityIdentifier("storeDetailProductAddButton")
             }
         }
         .padding(12)
diff --git a/PediFoodsUITests/CartCheckoutFlowTests.swift b/PediFoodsUITests/CartCheckoutFlowTests.swift
index 9028e6d..47b5aaa 100644
--- a/PediFoodsUITests/CartCheckoutFlowTests.swift
+++ b/PediFoodsUITests/CartCheckoutFlowTests.swift
@@ -228,20 +228,20 @@ final class CartCheckoutFlowTests: XCTestCase {
         )
         storeCard.tap()
 
-        // A plain (non-addon, non-pizza) product row's "+" control adds
-        // directly with no sheet. Once a product's quantity is > 0, its
-        // outer Button's identifier moves off itself - the same badge-
-        // merging bug already fixed for the tab bar's cart icon - because
-        // the row's own quantity Text becomes the Button's accessible
-        // label/identity instead. The QA account's cart has genuinely
-        // accumulated real quantities across many runs today, so
-        // app.buttons.matching(identifier: "plus") stopped matching once
-        // the first several products all had quantity > 0 (confirmed via
-        // screenshot: the "+" controls were clearly visible on screen
-        // while the buttons-only query found nothing). The nested Image
-        // keeps identifier "plus" regardless of quantity, so target that
-        // directly instead - same fix pattern as the cart-tab icon.
-        let addButton = app.images.matching(identifier: "plus").firstMatch
+        // The product row's add button carries an explicit
+        // `.accessibilityIdentifier("storeDetailProductAddButton")`
+        // (StoreDetailView+Components.swift) - added after discovering
+        // that matching on the inner "plus" SF Symbol's implicit/
+        // auto-generated identifier was unreliable: `quickDiagnostics`'s
+        // visible-text dump showed a real product ("Alcatra", R$ 14,00)
+        // clearly rendered on screen while `images.matching(identifier:
+        // "plus")` still found nothing, and the same "plus" systemName is
+        // separately reused by CartView's quantity stepper, making it an
+        // ambiguous identifier to search by in the first place. Matching
+        // the button itself (not a nested image) also sidesteps the
+        // quantity-badge accessibility-label-merging issue that affected
+        // the tab bar's cart icon elsewhere in this suite.
+        let addButton = app.buttons.matching(identifier: "storeDetailProductAddButton").firstMatch
         XCTAssertTrue(
             addButton.waitForExistence(timeout: 25),
             "Store Detail's product list never loaded. \(quickDiagnostics(app))"