diff --git a/plinth/tests/test_clients.py b/plinth/tests/test_clients.py
index a5db06566..4b05e26d9 100644
--- a/plinth/tests/test_clients.py
+++ b/plinth/tests/test_clients.py
@@ -18,8 +18,6 @@
 Test module for clients module.
 """
 
-import unittest
-
 from plinth import clients
 from plinth.modules.deluge.manifest import clients as deluge_clients
 from plinth.modules.infinoted.manifest import clients as infinoted_clients
@@ -28,25 +26,25 @@ from plinth.modules.syncthing.manifest import clients as syncthing_clients
 from plinth.modules.tor.manifest import clients as tor_clients
 
 
-class TestClients(unittest.TestCase):
-    """Test utilities provided by clients module."""
+def test_of_type_web():
+    """Test filtering clients of type web."""
+    assert clients.of_type(syncthing_clients, 'web')
+    assert not clients.of_type(quassel_clients, 'web')
 
-    def test_of_type_web(self):
-        """Test filtering clients of type web."""
-        self.assertTrue(clients.of_type(syncthing_clients, 'web'))
-        self.assertFalse(clients.of_type(quassel_clients, 'web'))
 
-    def test_of_type_mobile(self):
-        """Test filtering clients of type mobile."""
-        self.assertTrue(clients.of_type(syncthing_clients, 'mobile'))
-        self.assertFalse(clients.of_type(infinoted_clients, 'mobile'))
+def test_of_type_mobile():
+    """Test filtering clients of type mobile."""
+    assert clients.of_type(syncthing_clients, 'mobile')
+    assert not clients.of_type(infinoted_clients, 'mobile')
 
-    def test_of_type_desktop(self):
-        """Test filtering clients of type desktop."""
-        self.assertTrue(clients.of_type(syncthing_clients, 'desktop'))
-        self.assertFalse(clients.of_type(deluge_clients, 'desktop'))
 
-    def test_of_type_package(self):
-        """Test filtering clients of type package."""
-        self.assertTrue(clients.of_type(syncthing_clients, 'package'))
-        self.assertFalse(clients.of_type(tor_clients, 'package'))
+def test_of_type_desktop():
+    """Test filtering clients of type desktop."""
+    assert clients.of_type(syncthing_clients, 'desktop')
+    assert not clients.of_type(deluge_clients, 'desktop')
+
+
+def test_of_type_package():
+    """Test filtering clients of type package."""
+    assert clients.of_type(syncthing_clients, 'package')
+    assert not clients.of_type(tor_clients, 'package')