diff --git a/odoo/addons/base/tests/test_mail.py b/odoo/addons/base/tests/test_mail.py
index 3fdadaba373..5973fd623fb 100644
--- a/odoo/addons/base/tests/test_mail.py
+++ b/odoo/addons/base/tests/test_mail.py
@@ -326,7 +326,7 @@ class TestHtmlTools(BaseCase):
         for content in void_strings_samples:
             self.assertTrue(is_html_empty(content))
 
-        void_html_samples = ['<p><br></p>', '<p><br> </p>']
+        void_html_samples = ['<p><br></p>', '<p><br> </p>', '<p><br /></p >']
         for content in void_html_samples:
             self.assertTrue(is_html_empty(content), 'Failed with %s' % content)
 
diff --git a/odoo/tools/mail.py b/odoo/tools/mail.py
index c37f6dcc369..eed992e142f 100644
--- a/odoo/tools/mail.py
+++ b/odoo/tools/mail.py
@@ -276,7 +276,7 @@ def is_html_empty(html_content):
     """
     if not html_content:
         return True
-    tag_re = re.compile(r'\<\s*\/?(?:p|div|span|br|b|i)\s*\>')
+    tag_re = re.compile(r'\<\s*\/?(?:p|div|span|br|b|i)\s*/?\s*\>')
     return not bool(re.sub(tag_re, '', html_content).strip())