diff --git a/config/ci.rb b/config/ci.rb
index bc96a3831..5ded71515 100644
--- a/config/ci.rb
+++ b/config/ci.rb
@@ -5,12 +5,13 @@ CI.run do
 
   step "Style: Ruby", "bin/rubocop"
 
-  step "Security: Gem audit", "bin/bundler-audit check --update"
-  step "Security: Importmap vulnerability audit", "bin/importmap audit"
-  step "Security: Brakeman code analysis", "bin/brakeman --quiet --no-pager --exit-on-warn --exit-on-error"
+  step "Security: Gem audit",       "bin/bundler-audit check --update"
+  step "Security: Importmap audit", "bin/importmap audit"
+  step "Security: Brakeman audit",  "bin/brakeman --quiet --no-pager --exit-on-warn --exit-on-error"
 
-  step "Tests: Rails", "bin/rails test"
-  step "Tests: 37id", "bin/rails 37id:test:units"
+  step "Tests: Rails",  "bin/rails test"
+  step "Tests: 37id",   "bin/rails 37id:test:units"
+  step "Tests: System", "bin/rails test:system"
 
   if success?
     step "Signoff: All systems go. Ready for merge and deploy.", "gh signoff"
diff --git a/test/application_system_test_case.rb b/test/application_system_test_case.rb
index d7e6bba8a..01bcbabeb 100644
--- a/test/application_system_test_case.rb
+++ b/test/application_system_test_case.rb
@@ -1,5 +1,31 @@
 require "test_helper"
 
 class ApplicationSystemTestCase < ActionDispatch::SystemTestCase
-  driven_by :selenium, using: :chrome, screen_size: [ 1400, 1400 ]
+  browser_options = Selenium::WebDriver::Chrome::Options.new.tap do |opts|
+    opts.add_argument("--window-size=1200,800")
+    opts.add_argument("--disable-extensions")
+    # Disable non-foreground tabs from getting a lower process priority
+    opts.add_argument("--disable-renderer-backgrounding")
+    # Normally, Chrome will treat a 'foreground' tab instead as backgrounded if the surrounding
+    # window is occluded (aka visually covered) by another window. This flag disables that.
+    opts.add_argument("--disable-backgrounding-occluded-windows")
+    # Suppress all permission prompts by automatically denying them.
+    opts.add_argument("--deny-permission-prompts")
+    opts.add_argument("--enable-automation")
+  end
+
+  Capybara.register_driver :chrome_headless do |app|
+    browser_options.add_argument("--headless")
+    Capybara::Selenium::Driver.new(app, browser: :chrome, options: browser_options)
+  end
+
+  Capybara.register_driver :chrome do |app|
+    Capybara::Selenium::Driver.new(app, browser: :chrome, options: browser_options)
+  end
+
+  if ENV["SYSTEM_TESTS_BROWSER"]
+    driven_by :chrome, screen_size: [ 1200, 1000 ]
+  else
+    driven_by :chrome_headless, screen_size: [ 1200, 1000 ]
+  end
 end
diff --git a/test/system/smoke_test.rb b/test/system/smoke_test.rb
new file mode 100644
index 000000000..be15df0cc
--- /dev/null
+++ b/test/system/smoke_test.rb
@@ -0,0 +1,67 @@
+require "application_system_test_case"
+
+class SmokeTest < ApplicationSystemTestCase
+  test "create a card" do
+    sign_in_as(users(:david))
+
+    visit cards_url(collection_ids: [ collections(:writebook).id ])
+    click_on "Add a card"
+    fill_in "card_title", with: "Hello, world!"
+    fill_in_lexxy with: "I am editing this thing"
+    click_on "Create card"
+
+    assert_selector "h1", text: "Hello, world!"
+  end
+
+  test "active storage attachments" do
+    sign_in_as(users(:david))
+
+    visit card_url(cards(:layout))
+    fill_in_lexxy with: "Here is a comment"
+    attach_file file_fixture("moon.jpg") do
+      click_on "Upload file"
+    end
+
+    assert_image_figure_attachment content_type: "image/jpeg", caption: "moon.jpg"
+
+    click_on "Post this comment"
+
+    assert_image_figure_attachment content_type: "image/jpeg", caption: "moon.jpg"
+  end
+
+  test "dismissing notifications" do
+    sign_in_as(users(:david))
+
+    notif = notifications(:logo_card_david_mention_by_jz)
+
+    assert_selector "div##{dom_id(notif)}"
+
+    within_window(open_new_window) { visit card_url(notif.card) }
+
+    assert_no_selector "div##{dom_id(notif)}"
+  end
+
+  private
+    def sign_in_as(user)
+      visit session_transfer_url(user.transfer_id)
+      assert_selector "h1", text: "Activity"
+    end
+
+    def fill_in_lexxy(selector = "lexxy-editor", with:)
+      editor_element = find(selector)
+      editor_element.set with
+      page.execute_script("arguments[0].value = '#{with}'", editor_element)
+    end
+
+    def assert_figure_attachment(content_type:, &block)
+      figure = find("figure.attachment[data-content-type='#{content_type}']")
+      within(figure, &block) if block_given?
+    end
+
+    def assert_image_figure_attachment(content_type: "image/png", caption:)
+      assert_figure_attachment(content_type: content_type) do
+        assert_selector("img[src*='/rails/active_storage']")
+        assert_selector "figcaption input[placeholder='#{caption}']"
+      end
+    end
+end