diff --git a/swh/loader/mercurial/tests/test_tasks.py b/swh/loader/mercurial/tests/test_tasks.py
new file mode 100644
index 0000000..c3f35aa
--- /dev/null
+++ b/swh/loader/mercurial/tests/test_tasks.py
@@ -0,0 +1,53 @@
+# Copyright (C) 2018  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
+
+import unittest
+from unittest.mock import patch
+
+from swh.loader.mercurial.tasks import LoadMercurial, LoadArchiveMercurial
+
+
+class TestTasks(unittest.TestCase):
+    def test_check_task_name(self):
+        task = LoadMercurial()
+        self.assertEqual(task.task_queue, 'swh_loader_mercurial')
+
+    @patch('swh.loader.mercurial.loader.HgBundle20Loader.load')
+    def test_task(self, mock_loader):
+        mock_loader.return_value = {'status': 'eventful'}
+        task = LoadMercurial()
+
+        # given
+        actual_result = task.run_task(
+            origin_url='origin_url', visit_date='now', directory='/some/repo')
+
+        self.assertEqual(actual_result, {'status': 'eventful'})
+
+        mock_loader.assert_called_once_with(
+            origin_url='origin_url', visit_date='now', directory='/some/repo')
+
+
+class TestTasks2(unittest.TestCase):
+    def test_check_task_name(self):
+        task = LoadArchiveMercurial()
+        self.assertEqual(task.task_queue, 'swh_loader_mercurial_archive')
+
+    @patch('swh.loader.mercurial.loader.HgArchiveBundle20Loader.load')
+    def test_task(self, mock_loader):
+        mock_loader.return_value = {'status': 'uneventful'}
+        task = LoadArchiveMercurial()
+
+        # given
+        actual_result = task.run_task(
+            origin_url='another_url',
+            archive_path='/some/tar.tgz',
+            visit_date='now')
+
+        self.assertEqual(actual_result, {'status': 'uneventful'})
+
+        mock_loader.assert_called_once_with(
+            origin_url='another_url',
+            archive_path='/some/tar.tgz',
+            visit_date='now')