diff --git a/spec/system/sidebar_spec.rb b/spec/system/sidebar_spec.rb
new file mode 100644
index 0000000000..bda9406194
--- /dev/null
+++ b/spec/system/sidebar_spec.rb
@@ -0,0 +1,71 @@
+require "rails_helper"
+
+RSpec.describe "sidebar", type: :system do
+  let!(:user) { create :user }
+
+  context "desktop" do
+    before(:example) do
+      visit "/"
+    end
+
+    it "is open on login" do
+      expect(page).to have_selector "div.sidebar-open"
+    end
+
+    it "toggles between open and closed" do
+      sidebar_button = page.find("button[data-action='click->sidebar#toggleSidebar']")
+      expect(page).to have_selector "div.sidebar-open"
+      sidebar_button.click
+      expect(page).to_not have_selector "div.sidebar-open"
+    end
+
+    it "remembers user choice" do
+      sidebar_button = page.find("button[data-action='click->sidebar#toggleSidebar']")
+      sidebar_button.click
+
+      visit "/admin/resources/users"
+
+      expect(page).to_not have_selector "div.sidebar-open"
+      sidebar_button.click
+
+      visit "/admin/resources/posts"
+      expect(page).to have_selector "div.sidebar-open"
+    end
+  end
+
+  context "mobile" do
+    before(:example) do
+      Capybara.current_session.current_window.resize_to(428, 926)
+      visit "/"
+    end
+
+    it "is closed on login" do
+      expect(page).to have_selector "div.sidebar-open"
+      expect(page).to have_selector "div.avo-sidebar.hidden", visible: false
+    end
+
+    it "toggles between open and closed" do
+      sidebar_button = page.find("button[data-action='click->sidebar#toggleSidebarOnMobile']")
+      expect(page).to have_selector "div.sidebar-open"
+      expect(page).to have_selector "div.avo-sidebar.hidden", visible: false
+
+      sidebar_button.click
+      expect(page).to have_selector "div.sidebar-open"
+      expect(page).to_not have_selector "div.avo-sidebar.hidden", visible: false
+      expect(page).to have_selector "div.avo-sidebar", visible: true
+    end
+
+    it "remains closed on navigation" do
+      sidebar_button = page.find("button[data-action='click->sidebar#toggleSidebarOnMobile']")
+      sidebar_button.click
+
+      visit "/admin/resources/users"
+
+      expect(page).to have_selector "div.avo-sidebar.hidden", visible: false
+      sidebar_button.click
+
+      visit "/admin/resources/posts"
+      expect(page).to have_selector "div.avo-sidebar.hidden", visible: false
+    end
+  end
+end