diff --git a/update_gwr_advance_ticket_date.py b/update_gwr_advance_ticket_date.py
index 6688754..2ee6433 100755
--- a/update_gwr_advance_ticket_date.py
+++ b/update_gwr_advance_ticket_date.py
@@ -4,6 +4,7 @@
 import configparser
 import os.path
 import smtplib
+import sys
 from email.message import EmailMessage
 from email.utils import formatdate, make_msgid
 
@@ -35,7 +36,7 @@ def send_mail(subject: str, body: str) -> None:
 
 def get_data_dir() -> str:
     """Read data dir from config."""
-    config_filename = os.path.join(os.path.dirname(__file__), "..", "config")
+    config_filename = os.path.join(os.path.dirname(__file__), "config")
 
     assert os.path.exists(config_filename)
 
@@ -57,6 +58,8 @@ def main() -> None:
     new_date = gwr.extract_weekday_date(new_html)
 
     if existing_date == new_date:
+        if sys.stdin.isatty():
+            print("date has't changed:", existing_date)
         return
 
     subject = "New GWR advance ticket booking date: {new_date}"
@@ -68,3 +71,7 @@ New date: {new_date}
 Agenda: https://edwardbetts.com/agenda/
 """
     send_mail(subject, body)
+
+
+if __name__ == "__main__":
+    main()