diff --git a/addons/barcodes/static/src/js/barcode_parser.js b/addons/barcodes/static/src/js/barcode_parser.js
index 0b98785cd8b..e11b2fc7bcd 100644
--- a/addons/barcodes/static/src/js/barcode_parser.js
+++ b/addons/barcodes/static/src/js/barcode_parser.js
@@ -158,9 +158,9 @@ export class BarcodeParser {
             match.base_code = base_code.join('');
         }
 
-        if (base_pattern[0] !== '^') {
-            base_pattern = "^" + base_pattern;
-        }
+        base_pattern = base_pattern.split('|')
+            .map(part => part.startsWith('^') ? part : '^' + part)
+            .join('|');
         match.match = match.base_code.match(base_pattern);
 
         return match;
diff --git a/addons/point_of_sale/static/tests/tours/BarcodeScanning.tour.js b/addons/point_of_sale/static/tests/tours/BarcodeScanning.tour.js
new file mode 100644
index 00000000000..fbef6db6105
--- /dev/null
+++ b/addons/point_of_sale/static/tests/tours/BarcodeScanning.tour.js
@@ -0,0 +1,41 @@
+/** @odoo-module */
+
+import { ProductScreen } from "@point_of_sale/../tests/tours/helpers/ProductScreenTourMethods";
+import { getSteps, startSteps } from "@point_of_sale/../tests/tours/helpers/utils";
+import { registry } from "@web/core/registry";
+
+registry
+    .category("web_tour.tours")
+    .add("BarcodeScanningTour", {
+        test: true,
+        url: "/pos/ui",
+        steps: () => {
+            startSteps();
+
+            // The following step is to make sure that the Chrome widget initialization ends
+            // If we try to use the barcode parser before its initiation, we will have
+            // some inconsistent JS errors:
+            // TypeError: Cannot read properties of undefined (reading 'parse_barcode')
+            ProductScreen.do.confirmOpeningPopup();
+
+            // Add a product with its barcode
+            ProductScreen.do.scan_barcode("0123456789");
+            ProductScreen.check.selectedOrderlineHas('Monitor Stand');
+            ProductScreen.do.scan_barcode("0123456789");
+            ProductScreen.check.selectedOrderlineHas('Monitor Stand', 2);
+
+            // Test "Prices product" EAN-13 `23.....{NNNDD}` barcode pattern
+            ProductScreen.do.scan_ean13_barcode("2301000000006");
+            ProductScreen.check.selectedOrderlineHas('Magnetic Board', 1, "0.00");
+            ProductScreen.do.scan_ean13_barcode("2301000123453");
+            ProductScreen.check.selectedOrderlineHas('Magnetic Board', 1, "123.45");
+
+            // Test "Weighted product" EAN-13 `21.....{NNDDD}` barcode pattern
+            ProductScreen.do.scan_ean13_barcode("2100002000000");
+            ProductScreen.check.selectedOrderlineHas('Wall Shelf Unit', 0, "0.00");
+            ProductScreen.do.scan_ean13_barcode("2100002080000");
+            ProductScreen.check.selectedOrderlineHas('Wall Shelf Unit', 8);
+
+            return getSteps();
+        }
+    });
diff --git a/addons/point_of_sale/static/tests/tours/helpers/ProductScreenTourMethods.js b/addons/point_of_sale/static/tests/tours/helpers/ProductScreenTourMethods.js
index 744503d7e6f..e12afd2ac46 100644
--- a/addons/point_of_sale/static/tests/tours/helpers/ProductScreenTourMethods.js
+++ b/addons/point_of_sale/static/tests/tours/helpers/ProductScreenTourMethods.js
@@ -277,6 +277,29 @@ class Do {
             },
         ];
     }
+    scan_barcode(barcode) {
+        return [
+            {
+                content: `PoS model scan barcode '${barcode}'`,
+                trigger: '.pos', // The element here does not really matter as long as it is present
+                run: () => { window.posmodel.env.services.barcode_reader.scan(barcode); },
+            },
+        ];
+    }
+    scan_ean13_barcode(barcode) {
+        return [
+            {
+                content: `PoS model scan EAN13 barcode '${barcode}'`,
+                trigger: '.pos', // The element here does not really matter as long as it is present
+                run: () => {
+                    const barcode_reader = window.posmodel.env.services.barcode_reader;
+                    barcode_reader.scan(
+                        barcode_reader.parser.sanitize_ean(barcode)
+                    );
+                },
+            },
+        ];
+    }
     goBackToMainScreen() {
         return [
             {
diff --git a/addons/point_of_sale/tests/test_frontend.py b/addons/point_of_sale/tests/test_frontend.py
index ceca57ce456..002b2148dfb 100644
--- a/addons/point_of_sale/tests/test_frontend.py
+++ b/addons/point_of_sale/tests/test_frontend.py
@@ -113,6 +113,7 @@ class TestPointOfSaleHttpCommon(AccountTestInvoicingHttpCommon):
             'available_in_pos': True,
             'list_price': 1.98,
             'taxes_id': False,
+            'barcode': '2100002000003',
         })
         cls.small_shelf = env['product.product'].create({
             'name': 'Small Shelf',
@@ -125,12 +126,14 @@ class TestPointOfSaleHttpCommon(AccountTestInvoicingHttpCommon):
             'available_in_pos': True,
             'list_price': 1.98,
             'taxes_id': False,
+            'barcode': '2301000000006',
         })
         cls.monitor_stand = env['product.product'].create({
             'name': 'Monitor Stand',
             'available_in_pos': True,
             'list_price': 3.19,
             'taxes_id': False,
+            'barcode': '0123456789',  # No pattern in barcode nomenclature
         })
         cls.desk_pad = env['product.product'].create({
             'name': 'Desk Pad',
@@ -151,6 +154,7 @@ class TestPointOfSaleHttpCommon(AccountTestInvoicingHttpCommon):
             'available_in_pos': True,
             'list_price': 5.10,
             'taxes_id': False,
+            'barcode': '2300001000008',
         })
         configurable_chair = env['product.product'].create({
             'name': 'Configurable Chair',
@@ -856,6 +860,15 @@ class TestUi(TestPointOfSaleHttpCommon):
         self.main_pos_config.with_user(self.pos_user).open_ui()
         self.start_tour("/pos/ui?config_id=%d" % self.main_pos_config.id, 'ReceiptScreenDiscountWithPricelistTour', login="pos_user")
 
+    def test_07_pos_barcodes_scan(self):
+        barcode_rule = self.env.ref("point_of_sale.barcode_rule_client")
+        barcode_rule.pattern = barcode_rule.pattern + "|234"
+        # should in theory be changed in the JS code to `|^234`
+        # If not, it will fail as it will mistakenly match with the product barcode "0123456789"
+
+        self.main_pos_config.with_user(self.pos_user).open_ui()
+        self.start_tour("/pos/ui?config_id=%d" % self.main_pos_config.id, 'BarcodeScanningTour', login="pos_user")
+
     def test_08_show_tax_excluded(self):
         # define a tax included tax record
         tax = self.env['account.tax'].create({