diff --git a/cloudbaseinit/tests/metadata/services/test_ec2service.py b/cloudbaseinit/tests/metadata/services/test_ec2service.py
index 2ce38df0..7ff45572 100644
--- a/cloudbaseinit/tests/metadata/services/test_ec2service.py
+++ b/cloudbaseinit/tests/metadata/services/test_ec2service.py
@@ -42,7 +42,7 @@ class EC2ServiceTest(unittest.TestCase):
         response = self._service.load()
         mock_check_metadata_ip_route.assert_called_once_with(
             CONF.ec2_metadata_base_url)
-        mock_get_host_name.assert_called_once()
+        mock_get_host_name.assert_called_once_with()
         if side_effect is Exception:
             self.assertFalse(response)
         else:
diff --git a/cloudbaseinit/tests/metadata/services/test_opennebulaservice.py b/cloudbaseinit/tests/metadata/services/test_opennebulaservice.py
index 149df3b7..bd9e600c 100644
--- a/cloudbaseinit/tests/metadata/services/test_opennebulaservice.py
+++ b/cloudbaseinit/tests/metadata/services/test_opennebulaservice.py
@@ -209,8 +209,9 @@ class TestOpenNebulaService(_TestOpenNebulaService):
             if level > 1:
                 (mock_osutils.get_volume_label
                     .assert_called_once_with(fakes["drive"]))
-                mock_os_path.join.assert_called_once()
-                mock_os_path.isfile.assert_called_once()
+                mock_os_path.join.assert_called_once_with(
+                    "mount_point", opennebulaservice.CONTEXT_FILE)
+                mock_os_path.isfile.assert_called_once_with("fake_path")
         # check response and members
         if level in (1, 2):
             self.assertFalse(ret)
diff --git a/cloudbaseinit/tests/osutils/test_windows.py b/cloudbaseinit/tests/osutils/test_windows.py
index 382f7410..add21ad8 100644
--- a/cloudbaseinit/tests/osutils/test_windows.py
+++ b/cloudbaseinit/tests/osutils/test_windows.py
@@ -1404,7 +1404,7 @@ class TestWindowsUtils(testutils.CloudbaseInitTestBase):
 
         response = self._winutils.get_dhcp_hosts_in_use()
 
-        mock_get_adapter_addresses.assert_called()
+        mock_get_adapter_addresses.assert_called_once_with()
         self.assertEqual([('fake mac address', 'fake dhcp server')], response)
 
     @mock.patch('cloudbaseinit.osutils.windows.WindowsUtils'
diff --git a/cloudbaseinit/tests/test_init.py b/cloudbaseinit/tests/test_init.py
index a3f7e5fe..f16932a8 100644
--- a/cloudbaseinit/tests/test_init.py
+++ b/cloudbaseinit/tests/test_init.py
@@ -155,7 +155,7 @@ class InitManagerTest(unittest.TestCase):
 
         self._init.configure_host()
 
-        self.osutils.wait_for_boot_completion.assert_called_once()
+        self.osutils.wait_for_boot_completion.assert_called_once_with()
         mock_get_metadata_service.assert_called_once_with()
         fake_service.get_name.assert_called_once_with()
         mock_check_os_requirements.assert_called_once_with(self.osutils,