diff --git a/addons/website/static/src/js/utils.js b/addons/website/static/src/js/utils.js
index 1b44781f47c..2eaec0c490b 100644
--- a/addons/website/static/src/js/utils.js
+++ b/addons/website/static/src/js/utils.js
@@ -284,8 +284,9 @@ function sendRequest(route, params) {
     let form = document.createElement('form');
     form.setAttribute('action', route);
     form.setAttribute('method', params.method || 'POST');
-    const isInIframe = window.frameElement && window.frameElement.classList.contains('o_iframe');
-    if (isInIframe) {
+    // This is an exception for the 404 page create page button, in backend we
+    // want to open the response in the top window not in the iframe.
+    if (params.forceTopWindow) {
         form.setAttribute('target', '_top');
     }
 
diff --git a/addons/website/views/website_templates.xml b/addons/website/views/website_templates.xml
index a69c084cbbf..3c973c0a758 100644
--- a/addons/website/views/website_templates.xml
+++ b/addons/website/views/website_templates.xml
@@ -2244,7 +2244,7 @@
             <div class="container">
                 <div class="alert alert-info text-center d-lg-flex justify-content-between align-items-center">
                     <p class="m-lg-0 text-info">This page does not exist, but you can create it as you are editor of this site.</p>
-                    <a role="button" class="btn btn-info js_disable_on_click post_link" t-attf-href="/website/add/#{path}?redirect=1#{from_template and '&amp;template=%s' % from_template}">Create Page</a>
+                    <a role="button" class="btn btn-info js_disable_on_click post_link" data-post_force-top-window="true" t-attf-href="/website/add/#{path}?redirect=1#{from_template and '&amp;template=%s' % from_template}">Create Page</a>
                 </div>
                 <div class="text-center text-muted p-3"><i class="fa fa-info-circle"></i> Edit the content below this line to adapt the default <strong>Page not found</strong> page.</div>
             </div>
diff --git a/addons/website_blog/static/tests/tours/blog_tags_tour.js b/addons/website_blog/static/tests/tours/blog_tags_tour.js
index b560555ba86..1cfbff09411 100644
--- a/addons/website_blog/static/tests/tours/blog_tags_tour.js
+++ b/addons/website_blog/static/tests/tours/blog_tags_tour.js
@@ -51,5 +51,16 @@ wTourUtils.registerWebsitePreviewTour('blog_tags', {
         content: "Verify tag does not appear in blog post anymore",
         trigger: "iframe #o_wblog_post_content div:has(.badge):not(:contains(testtag))",
         run: () => {}, // it's a check
+    }, {
+        content: "Go back to /blog",
+        trigger: "iframe #top_menu a[href='/blog'] span",
+    }, {
+        content: "Click on the adventure tag",
+        trigger: "iframe a[href^='/blog/tag/adventure']",
+    }, {
+        content: "Verify we are still on the backend",
+        trigger: "iframe span:contains(adventure) i.fa-tag",
+        run: () => {}, // it's a check
+
     }]
 );
diff --git a/addons/website_sale/static/tests/tours/website_sale_add_to_cart_snippet_tour.js b/addons/website_sale/static/tests/tours/website_sale_add_to_cart_snippet_tour.js
index 83e70d6be25..e4560a6fa20 100644
--- a/addons/website_sale/static/tests/tours/website_sale_add_to_cart_snippet_tour.js
+++ b/addons/website_sale/static/tests/tours/website_sale_add_to_cart_snippet_tour.js
@@ -44,11 +44,11 @@ wTourUtils.registerWebsitePreviewTour('add_to_cart_snippet_tour', {
         ...wTourUtils.selectElementInWeSelectWidget('action_picker_opt', 'Buy Now'),
         ...wTourUtils.clickOnSave(),
         wTourUtils.clickOnElement('add to cart button', 'iframe .s_add_to_cart_btn'),
-        wTourUtils.assertPathName('/shop/payment', 'button[name=o_payment_submit_button]'),
+        wTourUtils.assertPathName('/@/shop/payment', 'iframe button[name=o_payment_submit_button]'),
 
-        wsTourUtils.goToCart({quantity: 4, backend: false}),
-        wsTourUtils.assertCartContains({productName: 'Acoustic Bloc Screens'}),
-        wsTourUtils.assertCartContains({productName: 'Conference Chair (Steel)'}),
-        wsTourUtils.assertCartContains({productName: 'Conference Chair (Aluminium)'}),
+        wsTourUtils.goToCart({quantity: 4, backend: true}),
+        wsTourUtils.assertCartContains({productName: 'Acoustic Bloc Screens', backend: true}),
+        wsTourUtils.assertCartContains({productName: 'Conference Chair (Steel)', backend: true}),
+        wsTourUtils.assertCartContains({productName: 'Conference Chair (Aluminium)', backend: true}),
     ],
 );