diff --git a/swh/scheduler/tests/test_utils.py b/swh/scheduler/tests/test_utils.py
index cba3036..4f3a8c9 100644
--- a/swh/scheduler/tests/test_utils.py
+++ b/swh/scheduler/tests/test_utils.py
@@ -1,82 +1,82 @@
-# Copyright (C) 2017-2018  The Software Heritage developers
+# Copyright (C) 2017-2022  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 datetime import timezone
-import unittest
 from unittest.mock import patch
 
 from swh.scheduler import utils
 
 
-class UtilsTest(unittest.TestCase):
-    @patch("swh.scheduler.utils.datetime")
-    def test_create_oneshot_task_dict_simple(self, mock_datetime):
-        mock_datetime.now.return_value = "some-date"
-
-        actual_task = utils.create_oneshot_task_dict("some-task-type")
-
-        expected_task = {
-            "policy": "oneshot",
-            "type": "some-task-type",
-            "next_run": "some-date",
-            "arguments": {
-                "args": [],
-                "kwargs": {},
-            },
-        }
-
-        self.assertEqual(actual_task, expected_task)
-        mock_datetime.now.assert_called_once_with(tz=timezone.utc)
-
-    @patch("swh.scheduler.utils.datetime")
-    def test_create_oneshot_task_dict_other_call(self, mock_datetime):
-        mock_datetime.now.return_value = "some-other-date"
-
-        actual_task = utils.create_oneshot_task_dict(
-            "some-task-type", "arg0", "arg1", priority="high", other_stuff="normal"
-        )
-
-        expected_task = {
-            "policy": "oneshot",
-            "type": "some-task-type",
-            "next_run": "some-other-date",
-            "arguments": {
-                "args": ("arg0", "arg1"),
-                "kwargs": {"other_stuff": "normal"},
-            },
-            "priority": "high",
-        }
-
-        self.assertEqual(actual_task, expected_task)
-        mock_datetime.now.assert_called_once_with(tz=timezone.utc)
-
-    @patch("swh.scheduler.utils.datetime")
-    def test_create_task_dict(self, mock_datetime):
-        mock_datetime.now.return_value = "date"
-
-        actual_task = utils.create_task_dict(
-            "task-type",
-            "recurring",
-            "arg0",
-            "arg1",
-            priority="low",
-            other_stuff="normal",
-            retries_left=3,
-        )
-
-        expected_task = {
-            "policy": "recurring",
-            "type": "task-type",
-            "next_run": "date",
-            "arguments": {
-                "args": ("arg0", "arg1"),
-                "kwargs": {"other_stuff": "normal"},
-            },
-            "priority": "low",
-            "retries_left": 3,
-        }
-
-        self.assertEqual(actual_task, expected_task)
-        mock_datetime.now.assert_called_once_with(tz=timezone.utc)
+@patch("swh.scheduler.utils.datetime")
+def test_create_oneshot_task_dict_simple(mock_datetime):
+    mock_datetime.now.return_value = "some-date"
+
+    actual_task = utils.create_oneshot_task_dict("some-task-type")
+
+    expected_task = {
+        "policy": "oneshot",
+        "type": "some-task-type",
+        "next_run": "some-date",
+        "arguments": {
+            "args": [],
+            "kwargs": {},
+        },
+    }
+
+    assert actual_task == expected_task
+    mock_datetime.now.assert_called_once_with(tz=timezone.utc)
+
+
+@patch("swh.scheduler.utils.datetime")
+def test_create_oneshot_task_dict_other_call(mock_datetime):
+    mock_datetime.now.return_value = "some-other-date"
+
+    actual_task = utils.create_oneshot_task_dict(
+        "some-task-type", "arg0", "arg1", priority="high", other_stuff="normal"
+    )
+
+    expected_task = {
+        "policy": "oneshot",
+        "type": "some-task-type",
+        "next_run": "some-other-date",
+        "arguments": {
+            "args": ("arg0", "arg1"),
+            "kwargs": {"other_stuff": "normal"},
+        },
+        "priority": "high",
+    }
+
+    assert actual_task == expected_task
+    mock_datetime.now.assert_called_once_with(tz=timezone.utc)
+
+
+@patch("swh.scheduler.utils.datetime")
+def test_create_task_dict(mock_datetime):
+    mock_datetime.now.return_value = "date"
+
+    actual_task = utils.create_task_dict(
+        "task-type",
+        "recurring",
+        "arg0",
+        "arg1",
+        priority="low",
+        other_stuff="normal",
+        retries_left=3,
+    )
+
+    expected_task = {
+        "policy": "recurring",
+        "type": "task-type",
+        "next_run": "date",
+        "arguments": {
+            "args": ("arg0", "arg1"),
+            "kwargs": {"other_stuff": "normal"},
+        },
+        "priority": "low",
+        "retries_left": 3,
+    }
+
+    assert actual_task == expected_task
+    mock_datetime.now.assert_called_once_with(tz=timezone.utc)