diff --git a/addons/website_sale/static/src/js/website_sale_tour_buy.js b/addons/website_sale/static/src/js/website_sale_tour_buy.js
index 3c9144b02c2..b1f045a037c 100644
--- a/addons/website_sale/static/src/js/website_sale_tour_buy.js
+++ b/addons/website_sale/static/src/js/website_sale_tour_buy.js
@@ -77,7 +77,7 @@ tour.register('shop_buy_product', {
             content: "Pay Now",
             //Either there are multiple payment methods, and one is checked, either there is only one, and therefore there are no radio inputs
             extra_trigger: '#payment_method label:contains("Wire Transfer") input:checked,#payment_method:not(:has("input:radio:visible"))',
-            trigger: 'button[id="o_payment_form_pay"]:visible',
+            trigger: 'button[id="o_payment_form_pay"]:visible:not(:disabled)',
         },
         {
             content: "finish",
diff --git a/addons/website_sale_delivery/static/src/js/website_sale_delivery.js b/addons/website_sale_delivery/static/src/js/website_sale_delivery.js
index 5e3957a6b95..971e604d1d1 100644
--- a/addons/website_sale_delivery/static/src/js/website_sale_delivery.js
+++ b/addons/website_sale_delivery/static/src/js/website_sale_delivery.js
@@ -44,6 +44,12 @@ odoo.define('website_sale_delivery.checkout', function (require) {
 
     var $carriers = $("#delivery_carrier input[name='delivery_type']");
     $carriers.click(_onCarrierClick);
+    // Workaround to:
+    // - update the amount/error on the label at first rendering
+    // - prevent clicking on 'Pay Now' if the shipper rating fails
+    if ($carriers.length > 0) {
+        $carriers.filter(':checked').click();
+    }
 
     /* Handle stuff */
     $(".oe_website_sale select[name='shipping_id']").on('change', function () {