diff --git a/addons/web/static/tests/utils.js b/addons/web/static/tests/utils.js
index e42eee759c9..f428ec92f8f 100644
--- a/addons/web/static/tests/utils.js
+++ b/addons/web/static/tests/utils.js
@@ -327,7 +327,7 @@ class Contains {
                     this.def.reject(e); // prevents infinite loop in case of programming error
                 }
             });
-            this.observer.observe(document.body, {
+            this.observer.observe(this.options.target, {
                 attributes: true,
                 childList: true,
                 subtree: true,
diff --git a/addons/website_livechat/static/tests/tours/website_livechat_chatbot_flow.js b/addons/website_livechat/static/tests/tours/website_livechat_chatbot_flow.js
index fbd1f46dad3..f6733e2e8e8 100644
--- a/addons/website_livechat/static/tests/tours/website_livechat_chatbot_flow.js
+++ b/addons/website_livechat/static/tests/tours/website_livechat_chatbot_flow.js
@@ -49,7 +49,7 @@ registry.category("web_tour.tours").add("website_livechat_chatbot_flow_tour", {
             // the thread has been persisted in the process
             async run() {
                 await contains(".o-mail-Message-actions [title='Add a Reaction']", {
-                    target: this.$anchor[0],
+                    target: this.$anchor[0].getRootNode(),
                     parent: [".o-mail-Message", { text: "I want to buy the software" }],
                 });
             },