diff --git a/backend/app/services/tempo_service.py b/backend/app/services/tempo_service.py
index a0acd21..7a1b1f4 100644
--- a/backend/app/services/tempo_service.py
+++ b/backend/app/services/tempo_service.py
@@ -164,6 +164,14 @@ def auto_log_test_worklog(
         )
         return None
 
+    # Tempo requires whole minutes. Always round UP to the nearest minute
+    # and enforce a minimum of 60 seconds (1 minute).
+    #   2 seconds         → 60 s  (1 min, minimum)
+    #   3 min 20 s (200s) → 240 s (4 min, ceiling)
+    #   5 min 0 s  (300s) → 300 s (5 min, exact)
+    import math
+    duration_seconds = max(60, math.ceil(duration_seconds / 60) * 60)
+
     # Per-user token required
     if not has_tempo_configured(user):
         logger.debug(