diff --git a/app/javascript/src/styles/specific/users.scss b/app/javascript/src/styles/specific/users.scss
index 52fe1b601..a3bbd9205 100644
--- a/app/javascript/src/styles/specific/users.scss
+++ b/app/javascript/src/styles/specific/users.scss
@@ -237,7 +237,7 @@ div#c-users {
   margin-bottom: 1em;
 }
 
-.simple_form.session {
+.simple_form.session_form {
   box-sizing: border-box;
   max-width: 360px;
   margin: 0;
diff --git a/app/views/sessions/new.html.erb b/app/views/sessions/new.html.erb
index 1e97827cb..e09de936f 100644
--- a/app/views/sessions/new.html.erb
+++ b/app/views/sessions/new.html.erb
@@ -1,5 +1,5 @@
 <div id="c-sessions"><div id="a-new">
-  <%= simple_form_for(:session, url: session_path) do |f| %>
+  <%= simple_form_for(:session, url: session_path, html: { class: "session_form" }) do |f| %>
     <h1>Sign in</h1>
     <%= f.input(:url, as: :hidden, input_html: { value: params[:url] }) %>
     <%= f.input(:name, label: "Username") %>