diff --git a/app/views/admin/users/show.html.erb b/app/views/admin/users/show.html.erb
index 14f8c7d..ca0cd09 100644
--- a/app/views/admin/users/show.html.erb
+++ b/app/views/admin/users/show.html.erb
@@ -48,7 +48,7 @@
                   <%= @user.invitations.count %>
                 </span>
                 <span>
-                  <button data-action="click->modal#open">
+                  <button id="add-invitations" data-action="click->modal#open">
                     <%= render partial: "icons/plus-circle", locals: {
                       custom_class: "text-green-600 hover:text-green-500 -mt-2 -mb-1 h-6 w-6 inline-block"
                     } %>
diff --git a/spec/features/admin/users_spec.rb b/spec/features/admin/users_spec.rb
new file mode 100644
index 0000000..c804823
--- /dev/null
+++ b/spec/features/admin/users_spec.rb
@@ -0,0 +1,55 @@
+require "rails_helper"
+
+RSpec.describe "Admin: User management", type: :feature do
+  let(:admin) { create :user }
+  let(:user) { create :user, id: 2, cn: "alfred", email: "alfred@example.com" }
+
+  before do
+    user.save!
+
+    allow(Devise::LDAP::Adapter).to receive(:get_ldap_param)
+      .with(admin.cn, :admin).and_return(["true"])
+    allow(Devise::LDAP::Adapter).to receive(:get_ldap_param)
+      .with(user.cn, :admin).and_return(nil)
+    allow_any_instance_of(User).to receive(:ldap_entry)
+      .and_return({ uid: user.cn, mail: user.email, display_name: "Freddy" })
+    allow_any_instance_of(LdapManager::FetchAvatar).to receive(:call)
+      .and_return(nil)
+
+    login_as admin, :scope => :user
+  end
+
+  describe "User details page" do
+    before do
+      visit admin_user_path("alfred")
+    end
+
+    it "shows the user info" do
+      within "h1" do
+        expect(page).to have_content("User: alfred")
+      end
+      expect(page).to have_content("alfred@example.com")
+    end
+  end
+
+  scenario 'Add invitations to account' do
+    visit admin_user_path("alfred")
+    find("#add-invitations").click
+
+    select "5", :from => "amount"
+    uncheck "notify_user"
+    click_button "Add"
+
+    expect(user.invitations.count).to eq(5)
+  end
+
+  scenario 'Remove invitations from account' do
+    3.times { Invitation.create(user: user) }
+    expect(user.invitations.count).to eq(3)
+
+    visit admin_user_path("alfred")
+    find("#remove-invitations").click
+
+    expect(user.invitations.count).to eq(0)
+  end
+end