diff --git a/website_event_attendee_fields/models/event_registration.py b/website_event_attendee_fields/models/event_registration.py
index 373594d..a7f90e2 100644
--- a/website_event_attendee_fields/models/event_registration.py
+++ b/website_event_attendee_fields/models/event_registration.py
@@ -1,6 +1,7 @@
 import logging
 
 from odoo import _, api, models
+from odoo.tools.mail import email_normalize
 
 _logger = logging.getLogger(__name__)
 
@@ -100,6 +101,9 @@ def _prepare_partner_for_attendee_fields(self, vals):
             fname = q.partner_field_name
             res[fname] = vals.pop(fname, False)
 
+        if res.get("email"):
+            res["email"] = email_normalize(res["email"])
+
         # Don't pass empty value, because it removes previous value.
         # E.g. when partner with email is specified
         # And known fields are not filled at the form
diff --git a/website_event_attendee_fields/static/src/js/test_tour.js b/website_event_attendee_fields/static/src/js/test_tour.js
index d602d23..4d90077 100644
--- a/website_event_attendee_fields/static/src/js/test_tour.js
+++ b/website_event_attendee_fields/static/src/js/test_tour.js
@@ -52,7 +52,7 @@ registry
 
                     $("input[name^='2-name']").val("Att2");
                     $("input[name^='2-phone']").val("222 222");
-                    $("input[name^='2-email']").val("att2@example.com");
+                    $("input[name^='2-email']").val("Att2@example.com");
                     $("select[name^='2-country_id']").val("1");
                     $("input[name^='2-function']").val("JOB2");
                 },