diff --git a/plinth/conftest.py b/plinth/conftest.py
index 9236f7fa6..6ab851b0c 100644
--- a/plinth/conftest.py
+++ b/plinth/conftest.py
@@ -223,7 +223,7 @@ def fixture_fix_session_browser_screenshots(request):
             continue
 
         value = fixture_def.cached_result[0]
-        should_take_screenshot = (hasattr(value, "__splinter_browser__")
+        should_take_screenshot = (hasattr(value, '__splinter_browser__')
                                   and splinter_make_screenshot_on_failure
                                   and getattr(request.node, 'splinter_failure',
                                               True))
@@ -250,3 +250,10 @@ def fixture_fix_session_browser_screenshots(request):
             }
 
             plugin._take_screenshot(**kwargs)
+
+
+@pytest.fixture(name='host_sudo')
+def fixture_host_sudo(host):
+    """Pytest fixture to run commands with sudo."""
+    with host.sudo():
+        yield host
diff --git a/plinth/tests/functional/install.sh b/plinth/tests/functional/install.sh
index a51cfbb1c..94ff71e82 100755
--- a/plinth/tests/functional/install.sh
+++ b/plinth/tests/functional/install.sh
@@ -5,7 +5,8 @@ IFS=$'\n\t'
 echo "Installing requirements"
 sudo apt-get install -yq --no-install-recommends \
     python3-pytest python3-pytest-django python3-pytest-instafail \
-    python3-pytest-xdist python3-pip python3-wheel firefox-esr git smbclient
+    python3-pytest-xdist python3-pip python3-wheel firefox-esr git smbclient \
+    python3-testinfra
 
 # Use compatible versions of Splinter and Selenium
 PIP_VERSION=$(dpkg-query -W -f '${Version}' python3-pip)