diff --git a/swh/lister/bitbucket/tasks.py b/swh/lister/bitbucket/tasks.py
index 841d6cc..8d222b8 100644
--- a/swh/lister/bitbucket/tasks.py
+++ b/swh/lister/bitbucket/tasks.py
@@ -45,9 +45,11 @@ def full_bitbucket_relister(self, split=None, **lister_args):
     lister = new_lister(**lister_args)
     ranges = lister.db_partition_indices(split or GROUP_SPLIT)
     random.shuffle(ranges)
-    group(range_bitbucket_lister.s(minv, maxv, **lister_args)
-          for minv, maxv in ranges)()
+    promise = group(range_bitbucket_lister.s(minv, maxv, **lister_args)
+                    for minv, maxv in ranges)()
     self.log.debug('%s OK (spawned %s subtasks)' % (self.name, len(ranges)))
+    promise.save()  # so that we can restore the GroupResult in tests
+    return promise.id
 
 
 @app.task(name='swh.lister.bitbucket.tasks.ping',
diff --git a/swh/lister/bitbucket/tests/conftest.py b/swh/lister/bitbucket/tests/conftest.py
new file mode 100644
index 0000000..507fef9
--- /dev/null
+++ b/swh/lister/bitbucket/tests/conftest.py
@@ -0,0 +1 @@
+from swh.lister.core.tests.conftest import *  # noqa
diff --git a/swh/lister/bitbucket/tests/test_tasks.py b/swh/lister/bitbucket/tests/test_tasks.py
new file mode 100644
index 0000000..7674627
--- /dev/null
+++ b/swh/lister/bitbucket/tests/test_tasks.py
@@ -0,0 +1,89 @@
+from time import sleep
+from celery.result import GroupResult
+
+from unittest.mock import patch
+
+
+def test_ping(swh_app, celery_session_worker):
+    res = swh_app.send_task(
+        'swh.lister.bitbucket.tasks.ping')
+    assert res
+    res.wait()
+    assert res.successful()
+    assert res.result == 'OK'
+
+
+@patch('swh.lister.bitbucket.tasks.BitBucketLister')
+def test_incremental(lister, swh_app, celery_session_worker):
+    # setup the mocked BitbucketLister
+    lister.return_value = lister
+    lister.db_last_index.return_value = 42
+    lister.run.return_value = None
+
+    res = swh_app.send_task(
+        'swh.lister.bitbucket.tasks.IncrementalBitBucketLister')
+    assert res
+    res.wait()
+    assert res.successful()
+
+    lister.assert_called_once_with(api_baseurl='https://api.bitbucket.org/2.0')
+    lister.db_last_index.assert_called_once_with()
+    lister.run.assert_called_once_with(min_bound=42, max_bound=None)
+
+
+@patch('swh.lister.bitbucket.tasks.BitBucketLister')
+def test_range(lister, swh_app, celery_session_worker):
+    # setup the mocked BitbucketLister
+    lister.return_value = lister
+    lister.run.return_value = None
+
+    res = swh_app.send_task(
+        'swh.lister.bitbucket.tasks.RangeBitBucketLister',
+        kwargs=dict(start=12, end=42))
+    assert res
+    res.wait()
+    assert res.successful()
+
+    lister.assert_called_once_with(api_baseurl='https://api.bitbucket.org/2.0')
+    lister.db_last_index.assert_not_called()
+    lister.run.assert_called_once_with(min_bound=12, max_bound=42)
+
+
+@patch('swh.lister.bitbucket.tasks.BitBucketLister')
+def test_relister(lister, swh_app, celery_session_worker):
+    # setup the mocked BitbucketLister
+    lister.return_value = lister
+    lister.run.return_value = None
+    lister.db_partition_indices.return_value = [
+        (i, i+9) for i in range(0, 50, 10)]
+
+    res = swh_app.send_task(
+        'swh.lister.bitbucket.tasks.FullBitBucketRelister')
+    assert res
+
+    res.wait()
+    assert res.successful()
+
+    # retrieve the GroupResult for this task and wait for all the subtasks
+    # to complete
+    promise_id = res.result
+    assert promise_id
+    promise = GroupResult.restore(promise_id, app=swh_app)
+    for i in range(5):
+        if promise.ready():
+            break
+        sleep(1)
+
+    lister.assert_called_with(api_baseurl='https://api.bitbucket.org/2.0')
+
+    # one by the FullBitbucketRelister task
+    # + 5 for the RangeBitbucketLister subtasks
+    assert lister.call_count == 6
+
+    lister.db_last_index.assert_not_called()
+    lister.db_partition_indices.assert_called_once_with(10000)
+
+    # lister.run should have been called once per partition interval
+    for i in range(5):
+        assert (dict(min_bound=10*i, max_bound=10*i + 9),) \
+            in lister.run.call_args_list
diff --git a/swh/lister/core/tests/conftest.py b/swh/lister/core/tests/conftest.py
index ab172eb..07ef181 100644
--- a/swh/lister/core/tests/conftest.py
+++ b/swh/lister/core/tests/conftest.py
@@ -9,6 +9,7 @@ def celery_enable_logging():
 @pytest.fixture(scope='session')
 def celery_includes():
     return [
+        'swh.lister.bitbucket.tasks',
         'swh.lister.github.tasks',
     ]