diff --git a/antarest/core/tasks/model.py b/antarest/core/tasks/model.py
index 1206db9fc4..6eacab3f10 100644
--- a/antarest/core/tasks/model.py
+++ b/antarest/core/tasks/model.py
@@ -177,7 +177,7 @@ def __repr__(self) -> str:
 def cancel_orphan_tasks(engine: Engine, session_args: Dict[str, bool]) -> None:
     updated_values = {
         TaskJob.status: TaskStatus.FAILED.value,
-        TaskJob.result: False,
+        TaskJob.result_status: False,
         TaskJob.result_msg: "Task was interrupted due to server restart",
         TaskJob.completion_date: datetime.utcnow(),
     }
diff --git a/tests/core/test_tasks.py b/tests/core/test_tasks.py
index dfad126555..73782745ce 100644
--- a/tests/core/test_tasks.py
+++ b/tests/core/test_tasks.py
@@ -6,6 +6,8 @@
 
 import pytest
 from sqlalchemy import create_engine
+from sqlalchemy.engine.base import Engine  # type: ignore
+from sqlalchemy.orm import sessionmaker
 
 from antarest.core.config import Config, RemoteWorkerConfig, TaskConfig
 from antarest.core.interfaces.eventbus import Event, EventType, IEventBus
@@ -13,12 +15,22 @@
 from antarest.core.model import PermissionInfo, PublicMode
 from antarest.core.persistence import Base
 from antarest.core.requests import RequestParameters, UserHasNotPermissionError
-from antarest.core.tasks.model import TaskDTO, TaskJob, TaskJobLog, TaskListFilter, TaskResult, TaskStatus, TaskType
+from antarest.core.tasks.model import (
+    TaskDTO,
+    TaskJob,
+    TaskJobLog,
+    TaskListFilter,
+    TaskResult,
+    TaskStatus,
+    TaskType,
+    cancel_orphan_tasks,
+)
 from antarest.core.tasks.repository import TaskJobRepository
 from antarest.core.tasks.service import TaskJobService
 from antarest.core.utils.fastapi_sqlalchemy import DBSessionMiddleware, db
 from antarest.eventbus.business.local_eventbus import LocalEventBus
 from antarest.eventbus.service import EventBusService
+from antarest.utils import SESSION_ARGS
 from antarest.worker.worker import AbstractWorker, WorkerTaskCommand
 from tests.helpers import with_db_context
 
@@ -453,3 +465,59 @@ def test_cancel():
     service.cancel_task("a", RequestParameters(user=DEFAULT_ADMIN_USER), dispatch=True)
     task.status = TaskStatus.CANCELLED.value
     repo_mock.save.assert_called_with(task)
+
+
+@pytest.mark.parametrize(
+    ("status", "result_status", "result_msg"),
+    [
+        (TaskStatus.RUNNING.value, False, "task ongoing"),
+        (TaskStatus.PENDING.value, True, "task pending"),
+        (TaskStatus.FAILED.value, False, "task failed"),
+        (TaskStatus.COMPLETED.value, True, "task finished"),
+        (TaskStatus.TIMEOUT.value, False, "task timed out"),
+        (TaskStatus.CANCELLED.value, True, "task canceled"),
+    ],
+)
+def test_cancel_orphan_tasks(
+    db_engine: Engine,
+    status: int,
+    result_status: bool,
+    result_msg: str,
+    max_diff_seconds: int = 6,
+    test_id: str = "test_cancel_orphan_tasks_id",
+):
+    completion_date: datetime.datetime = datetime.datetime.utcnow()
+    task_job = TaskJob(
+        id=test_id,
+        status=status,
+        result_status=result_status,
+        result_msg=result_msg,
+        completion_date=completion_date,
+    )
+    with sessionmaker(bind=db_engine, **dict(SESSION_ARGS))() as session:
+        if session.query(TaskJob).get(test_id) is not None:
+            session.merge(task_job)
+            session.commit()
+        else:
+            session.add(task_job)
+            session.commit()
+    cancel_orphan_tasks(engine=db_engine, session_args=dict(SESSION_ARGS))
+    with sessionmaker(bind=db_engine, **dict(SESSION_ARGS))() as session:
+        if status in [TaskStatus.RUNNING.value, TaskStatus.PENDING.value]:
+            updated_task_job = (
+                session.query(TaskJob)
+                .filter(TaskJob.status.in_([TaskStatus.RUNNING.value, TaskStatus.PENDING.value]))
+                .all()
+            )
+            assert not updated_task_job
+            updated_task_job = session.query(TaskJob).get(test_id)
+            assert updated_task_job.status == TaskStatus.FAILED.value
+            assert not updated_task_job.result_status
+            assert updated_task_job.result_msg == "Task was interrupted due to server restart"
+            assert (datetime.datetime.utcnow() - updated_task_job.completion_date).seconds <= max_diff_seconds
+        else:
+            updated_task_job = session.query(TaskJob).get(test_id)
+            assert updated_task_job.status == status
+            assert updated_task_job.result_status == result_status
+            assert updated_task_job.result_msg == result_msg
+            assert (datetime.datetime.utcnow() - updated_task_job.completion_date).seconds <= max_diff_seconds