diff --git a/plinth/modules/ikiwiki/templates/ikiwiki_create.html b/plinth/modules/ikiwiki/templates/ikiwiki_create.html
index 2637bbfac..2ba5d0ad0 100644
--- a/plinth/modules/ikiwiki/templates/ikiwiki_create.html
+++ b/plinth/modules/ikiwiki/templates/ikiwiki_create.html
@@ -9,7 +9,7 @@
 {% block content %}
   <h3>{% trans "Create Wiki or Blog" %}</h3>
 
-  <form class="form" method="post">
+  <form class="form form-create" method="post">
     {% csrf_token %}
 
     {{ form|bootstrap }}
diff --git a/plinth/modules/ikiwiki/templates/ikiwiki_delete.html b/plinth/modules/ikiwiki/templates/ikiwiki_delete.html
index 0878509ba..08c39e100 100644
--- a/plinth/modules/ikiwiki/templates/ikiwiki_delete.html
+++ b/plinth/modules/ikiwiki/templates/ikiwiki_delete.html
@@ -22,7 +22,7 @@
     {% endblocktrans %}
   </p>
 
-  <form class="form" method="post">
+  <form class="form form-delete" method="post">
     {% csrf_token %}
 
     <input type="submit" class="btn btn-md btn-danger"
diff --git a/plinth/modules/ikiwiki/tests/test_functional.py b/plinth/modules/ikiwiki/tests/test_functional.py
index 6d68089db..183ceae07 100644
--- a/plinth/modules/ikiwiki/tests/test_functional.py
+++ b/plinth/modules/ikiwiki/tests/test_functional.py
@@ -4,6 +4,7 @@ Functional, browser based tests for ikiwiki app.
 """
 
 import pytest
+
 from plinth.tests import functional
 
 pytestmark = [pytest.mark.apps, pytest.mark.ikiwiki]
@@ -39,7 +40,7 @@ def _create_wiki_if_needed(browser):
             functional.config['DEFAULT']['username'])
         browser.find_by_id('id_ikiwiki-admin_password').fill(
             functional.config['DEFAULT']['password'])
-        functional.submit(browser)
+        functional.submit(browser, form_class='form-create')
 
 
 def _delete_wiki(browser):
@@ -47,7 +48,7 @@ def _delete_wiki(browser):
     functional.nav_to_module(browser, 'ikiwiki')
     browser.links.find_by_href(
         '/plinth/apps/ikiwiki/wiki/delete/').first.click()
-    functional.submit(browser)
+    functional.submit(browser, form_class='form-delete')
 
 
 def _wiki_exists(browser):