diff --git a/test/unit/email_process_identify_sender_max_test.rb b/test/unit/email_process_identify_sender_max_test.rb
index f431c6c52..154cabf62 100644
--- a/test/unit/email_process_identify_sender_max_test.rb
+++ b/test/unit/email_process_identify_sender_max_test.rb
@@ -25,8 +25,8 @@ Some Text"
       if recipients.present?
         recipients += ', '
       end
-      domain = "#{Time.zone.now.to_i}-#{rand(999_999_999)}.example.com"
-      email = "#{Time.zone.now.to_i}-#{rand(999_999_999)}@#{domain}"
+      domain = "#{Time.zone.now.to_i}-#{rand(999_999_999_999_999)}.example.com"
+      email = "#{Time.zone.now.to_i}-#{rand(999_999_999_999_999)}@#{domain}"
       recipients += email
     end
     recipients