diff --git a/src/CSET/cset_workflow/app/fetch_fcst/bin/fetch_data.py b/src/CSET/cset_workflow/app/fetch_fcst/bin/fetch_data.py
index aa40b2756..acf999a7c 100644
--- a/src/CSET/cset_workflow/app/fetch_fcst/bin/fetch_data.py
+++ b/src/CSET/cset_workflow/app/fetch_fcst/bin/fetch_data.py
@@ -217,13 +217,13 @@ def _template_file_path(
     match date_type:
         case "validity":
             date = data_time
-            while date <= data_time + forecast_length:
+            while date < data_time + forecast_length:
                 placeholder_times.append(date)
                 date += data_period
         case "initiation":
             placeholder_times.append(data_time)
             lead_time = forecast_offset
-            while lead_time <= forecast_length:
+            while lead_time < forecast_length:
                 lead_times.append(lead_time)
                 lead_time += data_period
         case _:
diff --git a/tests/workflow_utils/test_fetch_data.py b/tests/workflow_utils/test_fetch_data.py
index f30af2162..f9415bcf5 100644
--- a/tests/workflow_utils/test_fetch_data.py
+++ b/tests/workflow_utils/test_fetch_data.py
@@ -186,7 +186,6 @@ def test_template_file_path_validity_time():
         "/path/2000-01-03.nc",
         "/path/2000-01-04.nc",
         "/path/2000-01-05.nc",
-        "/path/2000-01-06.nc",
     ]
     assert actual == expected