diff --git a/backend/address2UPRN/main.py b/backend/address2UPRN/main.py
index 79c0de69..28ad344f 100644
--- a/backend/address2UPRN/main.py
+++ b/backend/address2UPRN/main.py
@@ -563,14 +563,14 @@ def handler(event, context, local=False):
             except Exception as s3_error:
                 logger.error(f"Failed to save results to S3: {s3_error}")
 
-            # Mark subtask as completed
+            # Mark subtask as complete
             try:
                 subtask_interface.update_subtask_status(
                     subtask_id,
-                    "completed",
+                    "complete",
                     outputs={"rows_processed": "todo -> show sensible output"},
                 )
-                logger.info(f"Marked subtask {subtask_id} as completed")
+                logger.info(f"Marked subtask {subtask_id} as complete")
             except Exception as db_error:
                 logger.error(f"Failed to mark subtask as completed: {db_error}")
 
diff --git a/backend/app/db/functions/tasks/Tasks.py b/backend/app/db/functions/tasks/Tasks.py
index 6c0fe89e..96980e78 100644
--- a/backend/app/db/functions/tasks/Tasks.py
+++ b/backend/app/db/functions/tasks/Tasks.py
@@ -195,7 +195,7 @@ class SubTaskInterface:
             task.status = "failed"
             task.job_completed = now
 
-        elif all(s in ("complete", "completed") for s in statuses):
+        elif all(s == "complete" for s in statuses):
             task.status = "complete"
             task.job_completed = now
 
diff --git a/backend/postcode_splitter/main.py b/backend/postcode_splitter/main.py
index 4f63ed4b..3d4b9aa0 100644
--- a/backend/postcode_splitter/main.py
+++ b/backend/postcode_splitter/main.py
@@ -263,10 +263,10 @@ def handler(event, context, local=False):
                     bucket_name=bucket_name,
                 )
 
-    # Mark subtask as completed
+    # Mark subtask as complete
     subtask_interface.update_subtask_status(
         subtask_id,
-        "completed",
+        "complete",
         outputs={"rows_processed": "completed"},
     )