diff --git a/test/unit/mail_handler_test.rb b/test/unit/mail_handler_test.rb
index 6abb18458..3a91a7d10 100644
--- a/test/unit/mail_handler_test.rb
+++ b/test/unit/mail_handler_test.rb
@@ -509,7 +509,7 @@ class MailHandlerTest < ActiveSupport::TestCase
               :allow_override => 'is_private,tracker,category,priority'
             )
     assert issue.is_a?(Issue)
-    refute issue.new_record?
+    assert_not issue.new_record?
     issue.reload
     assert_equal 'New ticket on a given project', issue.subject
     assert issue.is_private