diff --git a/swh/loader/core/tests/test_tasks.py b/swh/loader/core/tests/test_tasks.py
index bf8d2e1..c0ab361 100644
--- a/swh/loader/core/tests/test_tasks.py
+++ b/swh/loader/core/tests/test_tasks.py
@@ -3,8 +3,13 @@
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
+import uuid
+
 import pytest
 
+from swh.scheduler.model import ListedOrigin, Lister
+from swh.scheduler.utils import create_origin_task_dict
+
 NAMESPACE = "swh.loader.core"
 
 
@@ -32,3 +37,44 @@ def test_tasks_content_loader(
     assert res.successful()
     assert mock_load.called
     assert res.result == {"status": "eventful"}
+
+
+@pytest.fixture
+def nixguix_lister():
+    return Lister(name="nixguix", instance_name="example", id=uuid.uuid4())
+
+
+@pytest.mark.parametrize("loader_name", ["Content", "Directory"])
+def test_tasks_loader_for_listed_origin(
+    mocker,
+    swh_scheduler_celery_app,
+    swh_scheduler_celery_worker,
+    swh_config,
+    nixguix_lister,
+    loader_name,
+):
+    mock_load = mocker.patch(f"{NAMESPACE}.loader.{loader_name}Loader.load")
+    mock_load.return_value = {"status": "eventful"}
+
+    listed_origin = ListedOrigin(
+        lister_id=nixguix_lister.id,
+        url="https://example.org/archives",
+        visit_type=loader_name.lower(),
+        extra_loader_arguments={
+            "origin_url": "https://example.org/artifact/artifact",
+            "fallback_urls": ["https://example.org/mirror/artifact-0.0.1.pkg.xz"],
+            "checksums": {"sha256": "some-valid-checksum"},
+        },
+    )
+
+    task_dict = create_origin_task_dict(listed_origin, nixguix_lister)
+
+    res = swh_scheduler_celery_app.send_task(
+        f"{NAMESPACE}.tasks.Load{loader_name}",
+        kwargs=task_dict["arguments"]["kwargs"],
+    )
+    assert res
+    res.wait()
+    assert res.successful()
+    assert mock_load.called
+    assert res.result == {"status": "eventful"}

[2022-10-03 15:08:28,803: ERROR/MainProcess] Task swh.loader.core.tasks.LoadContent[5da7f77a-d698-44d4-b6e5-4a3b2d72e852] raised unexpected: TypeError("__init__() got an unexpected keyword argument 'url'")
Traceback (most recent call last):
  File "/home/anlambert/.virtualenvs/swh/lib/python3.9/site-packages/celery/app/trace.py", line 451, in trace_task
    R = retval = fun(*args, **kwargs)
  File "/home/anlambert/swh/swh-environment/swh-scheduler/swh/scheduler/task.py", line 61, in __call__
    result = super().__call__(*args, **kwargs)
  File "/home/anlambert/.virtualenvs/swh/lib/python3.9/site-packages/celery/app/task.py", line 392, in __call__
    return self.run(*args, **kwargs)
  File "/home/anlambert/swh/swh-environment/swh-loader-core/swh/loader/core/tasks.py", line 14, in load_content
    return ContentLoader.from_configfile(**kwargs).load()
  File "/home/anlambert/swh/swh-environment/swh-loader-core/swh/loader/core/loader.py", line 188, in from_configfile
    return cls.from_config(**config)
  File "/home/anlambert/swh/swh-environment/swh-loader-core/swh/loader/core/loader.py", line 174, in from_config
    return cls(storage=storage_instance, **config)
  File "/home/anlambert/swh/swh-environment/swh-loader-core/swh/loader/core/loader.py", line 713, in __init__
    super().__init__(*args, **kwargs)
  File "/home/anlambert/swh/swh-environment/swh-loader-core/swh/loader/core/loader.py", line 675, in __init__
    super().__init__(*args, **kwargs)
TypeError: __init__() got an unexpected keyword argument 'url'