diff --git a/plinth/modules/backups/tests/test_functional.py b/plinth/modules/backups/tests/test_functional.py
index 05b1525e0..353dc2849 100644
--- a/plinth/modules/backups/tests/test_functional.py
+++ b/plinth/modules/backups/tests/test_functional.py
@@ -77,7 +77,7 @@ def _backup_download(session_browser, downloaded_file_info, archive_name):
 
 def _backup_restore_from_upload(session_browser, app_name,
                                 downloaded_file_info):
-    path = downloaded_file_info["path"]
+    path = downloaded_file_info['path']
     try:
         _upload_and_restore(session_browser, app_name, path)
     except Exception as err:
@@ -155,11 +155,11 @@ def _backup_schedule_set(browser, enable, daily, weekly, monthly, run_at,
 
 def _download_file_logged_in(browser, url, suffix=''):
     """Download a file from Plinth, pretend being logged in via cookies"""
-    if not url.startswith("http"):
+    if not url.startswith('http'):
         current_url = urllib.parse.urlparse(browser.url)
-        url = "%s://%s%s" % (current_url.scheme, current_url.netloc, url)
+        url = '%s://%s%s' % (current_url.scheme, current_url.netloc, url)
     cookies = browser.driver.get_cookies()
-    cookies = {cookie["name"]: cookie["value"] for cookie in cookies}
+    cookies = {cookie['name']: cookie['value'] for cookie in cookies}
     response = requests.get(url, verify=False, cookies=cookies)
     with tempfile.NamedTemporaryFile(delete=False, suffix=suffix) as temp_file:
         for chunk in response.iter_content(chunk_size=128):
@@ -183,8 +183,8 @@ def _open_main_page(browser):
 def _upload_and_restore(browser, app_name, downloaded_file_path):
     functional.nav_to_module(browser, 'backups')
     browser.links.find_by_href('/plinth/sys/backups/upload/').first.click()
-    fileinput = browser.driver.find_element_by_id('id_backups-file')
-    fileinput.send_keys(downloaded_file_path)
+    fileinput = browser.find_by_id('id_backups-file')
+    fileinput.fill(downloaded_file_path)
     # submit upload form
     functional.submit(browser, form_class='form-upload')
     # submit restore form
diff --git a/plinth/modules/openvpn/tests/test_functional.py b/plinth/modules/openvpn/tests/test_functional.py
index 59285c245..4c8aeda47 100644
--- a/plinth/modules/openvpn/tests/test_functional.py
+++ b/plinth/modules/openvpn/tests/test_functional.py
@@ -63,6 +63,6 @@ def _profile_download_compare(session_browser, openvpn_profile):
 def _download_profile(browser):
     """Return the content of the current user's OpenVPN profile."""
     browser.visit(base_url)
-    browser.click_link_by_href(shortcut_href)
+    browser.links.find_by_href(shortcut_href).click()
     profile_url = f'{base_url}/plinth/apps/openvpn/profile/'
     return functional.download_file(browser, profile_url)
diff --git a/plinth/modules/transmission/tests/test_functional.py b/plinth/modules/transmission/tests/test_functional.py
index 4cea09330..002593671 100644
--- a/plinth/modules/transmission/tests/test_functional.py
+++ b/plinth/modules/transmission/tests/test_functional.py
@@ -57,11 +57,11 @@ def _remove_all_torrents(browser):
         torrents.first.click()
         functional.eventually(browser.is_element_not_present_by_css,
                               args=['#toolbar-remove.disabled'])
-        browser.click_link_by_id('toolbar-remove')
+        browser.find_by_id('toolbar-remove').click()
         functional.eventually(
             browser.is_element_not_present_by_css,
             args=['#dialog-container[style="display: none;"]'])
-        browser.click_link_by_id('dialog_confirm_button')
+        browser.find_by_id('dialog_confirm_button').click()
         functional.eventually(browser.is_element_present_by_css,
                               args=['#toolbar-remove.disabled'])
 
@@ -71,11 +71,11 @@ def _upload_sample_torrent(browser):
     functional.visit(browser, '/transmission')
     file_path = os.path.join(os.path.dirname(__file__), 'data',
                              'sample.torrent')
-    browser.click_link_by_id('toolbar-open')
+    browser.find_by_id('toolbar-open').click()
     functional.eventually(browser.is_element_not_present_by_css,
                           args=['#upload-container[style="display: none;"]'])
     browser.attach_file('torrent_files[]', [file_path])
-    browser.click_link_by_id('upload_confirm_button')
+    browser.find_by_id('upload_confirm_button').click()
     functional.eventually(browser.is_element_present_by_css,
                           args=['#torrent_list .torrent'])
 
diff --git a/plinth/tests/functional/install.sh b/plinth/tests/functional/install.sh
index ff719feb5..678e7b768 100755
--- a/plinth/tests/functional/install.sh
+++ b/plinth/tests/functional/install.sh
@@ -11,7 +11,7 @@ sudo apt-get install -yq --no-install-recommends \
 PIP_VERSION=$(dpkg-query -W -f '${Version}' python3-pip)
 PIP_OPTIONS=
 dpkg --compare-versions 23 \<= $PIP_VERSION && PIP_OPTIONS=--break-system-packages
-pip3 install $PIP_OPTIONS selenium==4.2.0 splinter==0.17.0 pytest-splinter pytest-reporter-html1
+pip3 install $PIP_OPTIONS selenium==4.25.0 splinter==0.21.0 pytest-splinter pytest-reporter-html1
 
 echo "Installing geckodriver"
 (