diff --git a/tools/benchmarks/owl-master/app.js b/tools/benchmarks/owl-master/app.js
index 9494baaa..4ea419b6 100644
--- a/tools/benchmarks/owl-master/app.js
+++ b/tools/benchmarks/owl-master/app.js
@@ -49,11 +49,12 @@ class App extends owl.Component {
 
   updateSomeMessages() {
     startMeasure("update every 10th");
+    const setState = owl.Observer.set;
     const messages = this.state.messages;
     for (let i = 0; i < this.state.messages.length; i += 10) {
       const msg = Object.assign({}, messages[i]);
       msg.author += '!!!';
-      this.set(messages, i, msg);
+      setState(messages, i, msg);
     }
     stopMeasure();
   }
diff --git a/tools/benchmarks/owl-master/templates.xml b/tools/benchmarks/owl-master/templates.xml
index 4e805ab9..94306687 100644
--- a/tools/benchmarks/owl-master/templates.xml
+++ b/tools/benchmarks/owl-master/templates.xml
@@ -19,8 +19,8 @@
   </div>
 
   <div t-name="Message" class="message">
-    <span class="author"><t t-esc="props.author"/></span>
-    <span class="msg"><t t-esc="props.msg"/></span>
+    <span class="author"><t t-esc="props.message.author"/></span>
+    <span class="msg"><t t-esc="props.message.msg"/></span>
     <button class="remove" t-on-click="removeMessage">Remove</button>
     <t t-widget="Counter"/>
   </div>
diff --git a/tools/server.py b/tools/server.py
index 9e726e90..ce7f1399 100644
--- a/tools/server.py
+++ b/tools/server.py
@@ -32,8 +32,8 @@ class OWLHandler(SimpleHTTPRequestHandler):
 OWLHandler.extensions_map['.js'] = 'application/javascript'
 
 if __name__ == "__main__":
-    print("Owl Extras")
-    print("----------")
+    print("Owl Tools")
+    print("---------")
     print("Server running on: {}".format(URL))
     httpd = HTTPServer((HOST, PORT), OWLHandler)
     threading.Thread(target=httpd.serve_forever, daemon=True).start()