diff --git a/swh/lister/sourceforge/tasks.py b/swh/lister/sourceforge/tasks.py
index 6ab0815..fb111be 100644
--- a/swh/lister/sourceforge/tasks.py
+++ b/swh/lister/sourceforge/tasks.py
@@ -1,20 +1,26 @@
 # Copyright (C) 2019-2021 the Software Heritage developers
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 from typing import Dict
 
 from celery import shared_task
 
 from swh.lister.sourceforge.lister import SourceForgeLister
 
 
 @shared_task(name=__name__ + ".FullSourceForgeLister")
 def list_sourceforge_full() -> Dict[str, int]:
     """Full update of a SourceForge instance"""
     return SourceForgeLister.from_configfile().run().dict()
 
 
+@shared_task(name=__name__ + ".IncrementalSourceForgeLister")
+def list_sourceforge_incremental() -> Dict[str, int]:
+    """Full update of a SourceForge instance"""
+    return SourceForgeLister.from_configfile(incremental=True).run().dict()
+
+
 @shared_task(name=__name__ + ".ping")
 def _ping():
     return "OK"
diff --git a/swh/lister/sourceforge/tests/test_tasks.py b/swh/lister/sourceforge/tests/test_tasks.py
index 3baad10..51752a9 100644
--- a/swh/lister/sourceforge/tests/test_tasks.py
+++ b/swh/lister/sourceforge/tests/test_tasks.py
@@ -1,34 +1,56 @@
 # Copyright (C) 2019-2021  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 from swh.lister.pattern import ListerStats
 
+lister_module = "swh.lister.sourceforge.tasks.SourceForgeLister"
+
 
 def test_sourceforge_ping(swh_scheduler_celery_app, swh_scheduler_celery_worker):
     res = swh_scheduler_celery_app.send_task("swh.lister.sourceforge.tasks.ping")
     assert res
     res.wait()
     assert res.successful()
     assert res.result == "OK"
 
 
 def test_sourceforge_full_lister_task(
     swh_scheduler_celery_app, swh_scheduler_celery_worker, mocker
 ):
     stats = ListerStats(pages=10, origins=900)
-    mock_lister = mocker.patch("swh.lister.sourceforge.tasks.SourceForgeLister")
+    mock_lister = mocker.patch(lister_module)
     mock_lister.from_configfile.return_value = mock_lister
     mock_lister.run.return_value = stats
 
     res = swh_scheduler_celery_app.send_task(
         "swh.lister.sourceforge.tasks.FullSourceForgeLister"
     )
     assert res
     res.wait()
     assert res.successful()
 
     mock_lister.from_configfile.assert_called_once()
     mock_lister.run.assert_called_once()
     assert res.result == stats.dict()
+
+
+def test_incremental_listing(
+    swh_scheduler_celery_app, swh_scheduler_celery_worker, mocker
+):
+    stats = ListerStats(pages=1, origins=90)
+    mock_lister = mocker.patch(lister_module)
+    mock_lister.from_configfile.return_value = mock_lister
+    mock_lister.run.return_value = stats
+
+    res = swh_scheduler_celery_app.send_task(
+        "swh.lister.sourceforge.tasks.IncrementalSourceForgeLister"
+    )
+    assert res
+    res.wait()
+    assert res.successful()
+
+    mock_lister.from_configfile.assert_called_once()
+    mock_lister.run.assert_called_once()
+    assert res.result == stats.dict()