diff --git a/plinth/modules/sso/tests/sso.feature b/plinth/modules/sso/tests/sso.feature
deleted file mode 100644
index f6f0d998e..000000000
--- a/plinth/modules/sso/tests/sso.feature
+++ /dev/null
@@ -1,20 +0,0 @@
-# SPDX-License-Identifier: AGPL-3.0-or-later
-
-@sso @essential @system
-Feature: Single Sign On
-  Test Single Sign On features.
-
-Background:
-  Given I'm a logged in user
-  Given the syncthing application is installed
-  Given the syncthing application is enabled
-
-
-Scenario: Logged out Plinth user cannot access Syncthing web interface
-  Given I'm a logged out user
-  When I access syncthing application
-  Then I should be prompted for login
-
-Scenario: Logged in Plinth user can access Syncthing web interface
-  When I access syncthing application
-  Then the syncthing site should be available
diff --git a/plinth/modules/sso/tests/test_functional.py b/plinth/modules/sso/tests/test_functional.py
index 3af0e47eb..631853720 100644
--- a/plinth/modules/sso/tests/test_functional.py
+++ b/plinth/modules/sso/tests/test_functional.py
@@ -3,6 +3,28 @@
 Functional, browser based tests for sso app.
 """
 
-from pytest_bdd import scenarios
+import pytest
+from plinth.tests import functional
 
-scenarios('sso.feature')
+pytestmark = [pytest.mark.system, pytest.mark.essential, pytest.mark.sso]
+
+
+@pytest.fixture(scope='module', autouse=True)
+def fixture_background(session_browser):
+    """Login and install the app."""
+    functional.login(session_browser)
+    functional.install(session_browser, 'syncthing')
+    functional.app_enable(session_browser, 'syncthing')
+    yield
+    functional.app_disable(session_browser, 'syncthing')
+
+
+def test_app_access(session_browser):
+    """Test that only logged-in users can access Syncthing web interface."""
+    functional.logout(session_browser)
+    functional.access_url(session_browser, 'syncthing')
+    assert functional.is_login_prompt(session_browser)
+
+    functional.login(session_browser)
+    functional.access_url(session_browser, 'syncthing')
+    assert functional.is_available(session_browser, 'syncthing')