diff --git a/muk_web_preview_mail/tests/test_mail_parse.py b/muk_web_preview_mail/tests/test_mail_parse.py
index 69ac653..8ae1879 100644
--- a/muk_web_preview_mail/tests/test_mail_parse.py
+++ b/muk_web_preview_mail/tests/test_mail_parse.py
@@ -31,6 +31,8 @@ from odoo.tests import common
 
 from odoo.addons.muk_web_preview_mail.controllers import main
 
+from requests import Request
+
 _path = os.path.dirname(os.path.dirname(__file__))
 _logger = logging.getLogger(__name__)
 
@@ -58,9 +60,13 @@ class MailParseTestCase(common.HttpCase):
         _logger.info(self.url_open('/'))  
         _logger.info(self.url_open('/').headers)    
         _logger.info(self.url_open('/').content)  
-        url = "/web/preview/converter/mail?url=/web/content/{}?download=true".format(
+        
+        params = {'url': "/web/content/{}?download=true".format(
            self.sample_mail_attachment.id
-        )
+        )}
+        request = Request('GET', '/web/preview/converter/mail', params=params).prepare()
+        url = request.url
+        
         _logger.info(url)
         self.assertTrue(self.url_open(url))
         _logger.info(self.url_open(url))