diff --git a/joj3_config_generator/transformers/repo.py b/joj3_config_generator/transformers/repo.py
index d9da48c..1cc37c7 100644
--- a/joj3_config_generator/transformers/repo.py
+++ b/joj3_config_generator/transformers/repo.py
@@ -96,9 +96,9 @@ def get_teapot_check_args(repo_conf: repo.Config, task_conf: task.Config) -> Lis
         )
         res.extend(["--group-config", group_config])
     if task_conf.time.begin:
-        res.extend(["--begin-time", task_conf.time.begin.isoformat()])
+        res.extend(["--begin-time", task_conf.time.begin.strftime("%Y-%m-%dT%H:%M:%S")])
     if task_conf.time.end:
-        res.extend(["--end-time", task_conf.time.end.isoformat()])
+        res.extend(["--end-time", task_conf.time.end.strftime("%Y-%m-%dT%H:%M:%S")])
     return res
 
 
diff --git a/tests/convert/basic/task.json b/tests/convert/basic/task.json
index ef56c58..9b28298 100644
--- a/tests/convert/basic/task.json
+++ b/tests/convert/basic/task.json
@@ -78,7 +78,7 @@
                                     "--group-config",
                                     "Manuel=500:24,Boming=501:48,Nuvole=502:72",
                                     "--end-time",
-                                    "2024-12-30T23:59:59+08:00"
+                                    "2024-12-30T23:59:59"
                                 ],
                                 "env": [
                                     "REPOS_DIR=/home/tt/.cache",