Fix the previous change

dav_events/tests/test_oneclickactions.py

@@ -124,8 +124,8 @@ class ActionTestCase(EmailTestMixin, RoleMixin, EventMixin, TestCase):
         # Sometimes this test fail, and we cannot see the tested content, so we create our own Exception
         try:
             self.assertInHTML(html, content)
-        except AssertionError as e:
-            raise AssertionError('Not in HTML:\n{}\n-----\n{}\n'.format(html, content)) from e
+        except AssertionError:
+            raise AssertionError('Not in HTML:\n{}\n-----\n{}\n'.format(html, content))
         self.assertRegex(content, r'alert-success')
 
     def setUp(self):