diff --git a/plinth/modules/sharing/templates/sharing_add_edit.html b/plinth/modules/sharing/templates/sharing_add_edit.html
index 19f4243a8..e48a265bb 100644
--- a/plinth/modules/sharing/templates/sharing_add_edit.html
+++ b/plinth/modules/sharing/templates/sharing_add_edit.html
@@ -11,7 +11,7 @@
 
   <h3>{{ title }}</h3>
 
-  <form class="form" method="post">
+  <form class="form form-add-edit" method="post">
     {% csrf_token %}
 
     {{ form|bootstrap }}
diff --git a/plinth/modules/sharing/tests/test_functional.py b/plinth/modules/sharing/tests/test_functional.py
index 1cf23b29f..8b2266e5e 100644
--- a/plinth/modules/sharing/tests/test_functional.py
+++ b/plinth/modules/sharing/tests/test_functional.py
@@ -85,7 +85,7 @@ def _add_share(browser, name, path, group):
     browser.fill('sharing-path', path)
     browser.find_by_css(
         '#id_sharing-groups input[value="{}"]'.format(group)).check()
-    functional.submit(browser)
+    functional.submit(browser, form_class='form-add-edit')
 
 
 def _edit_share(browser, old_name, new_name, path, group):
@@ -98,7 +98,7 @@ def _edit_share(browser, old_name, new_name, path, group):
     browser.find_by_css('#id_sharing-groups input').uncheck()
     browser.find_by_css(
         '#id_sharing-groups input[value="{}"]'.format(group)).check()
-    functional.submit(browser)
+    functional.submit(browser, form_class='form-add-edit')
 
 
 def _get_share(browser, name):
@@ -133,7 +133,7 @@ def _make_share_public(browser, name):
     with functional.wait_for_page_update(browser):
         row.find_by_css('.share-edit')[0].click()
     browser.find_by_id('id_sharing-is_public').check()
-    functional.submit(browser)
+    functional.submit(browser, form_class='form-add-edit')
 
 
 def _verify_invalid_share(browser, name):