diff --git a/test/test_cli_routes.rb b/test/test_cli_routes.rb
new file mode 100644
index 0000000..4e880c2
--- /dev/null
+++ b/test/test_cli_routes.rb
@@ -0,0 +1,146 @@
+require 'minitest/autorun'
+require 'prism'
+require 'stringio'
+require 'tmpdir'
+require 'fileutils'
+
+class CliRoutesTest < Minitest::Test
+  def setup
+    @workdir = Dir.mktmpdir('prism-cli-routes')
+    @cli = Prism::Cli.new(@workdir)
+  end
+
+  def teardown
+    FileUtils.remove_entry(@workdir)
+    %i[RoutesTestApp RoutesTestOtherApp].each do |name|
+      Object.send(:remove_const, name) if Object.const_defined?(name)
+    end
+  end
+
+  def write_fixture(filename, content)
+    path = File.join(@workdir, filename)
+    File.write(path, content)
+    filename
+  end
+
+  def run_routes(extra_args = [])
+    out = StringIO.new
+    @cli.routes(extra_args, out: out)
+    out.string
+  end
+
+  def test_lists_named_and_unnamed_routes_with_verb_path_and_target
+    write_fixture('app.rb', <<~RUBY)
+      class RoutesTestApp < Prism::Application
+        root to: 'posts#index'
+        get '/posts/:id', to: 'posts#show', as: :post
+        post '/posts', to: 'posts#create'
+      end
+    RUBY
+
+    output = run_routes(['--require=app.rb'])
+
+    assert_match(/GET\s+\/\s+posts#index\s+root_path/, output)
+    assert_match(/GET\s+\/posts\/:id\s+posts#show\s+post_path/, output)
+    assert_match(/POST\s+\/posts\s+posts#create\s*$/, output)
+  end
+
+  def test_resources_expands_into_seven_named_routes
+    write_fixture('app.rb', <<~RUBY)
+      class RoutesTestApp < Prism::Application
+        resources :posts
+      end
+    RUBY
+
+    output = run_routes(['--require=app.rb'])
+    lines = output.lines.map(&:strip)
+
+    # 7 REST actions, but :update maps to both PATCH and PUT (Rails does the
+    # same) so that is 8 route rows total.
+    assert_equal 8, lines.count { |line| line.include?('posts#') }
+    assert(lines.any? { |line| line.start_with?('GET') && line.include?('posts_path') && line.include?('posts#index') })
+    assert(lines.any? { |line| line.include?('new_post_path') && line.include?('posts#new') })
+    assert(lines.any? { |line| line.include?('edit_post_path') && line.include?('posts#edit') })
+  end
+
+  def test_inline_block_route_is_labeled_block_instead_of_controller_action
+    write_fixture('app.rb', <<~RUBY)
+      class RoutesTestApp < Prism::Application
+        get('/ping') { |req, res| res.write('pong') }
+      end
+    RUBY
+
+    output = run_routes(['--require=app.rb'])
+    assert_match(%r{GET\s+/ping\s+\(block\)}, output)
+  end
+
+  def test_mounted_apps_are_listed_separately_from_regular_routes
+    write_fixture('app.rb', <<~'RUBY')
+      class RoutesTestApp < Prism::Application
+        root to: 'posts#index'
+        mount '/admin', ->(env) { [200, {}, ['admin']] }
+      end
+    RUBY
+
+    output = run_routes(['--require=app.rb'])
+    assert_includes output, 'MOUNT  /admin ->'
+    refute_match(/MOUNT.*posts#index/, output)
+  end
+
+  def test_raises_when_no_application_subclass_is_loaded
+    assert_raises(Prism::Cli::UsageError) { run_routes([]) }
+  end
+
+  def test_raises_and_names_both_classes_when_multiple_applications_are_loaded_without_dash_dash_app
+    write_fixture('app.rb', <<~RUBY)
+      class RoutesTestApp < Prism::Application
+        root to: 'posts#index'
+      end
+      class RoutesTestOtherApp < Prism::Application
+        root to: 'comments#index'
+      end
+    RUBY
+
+    error = assert_raises(Prism::Cli::UsageError) { run_routes(['--require=app.rb']) }
+    assert_includes error.message, 'RoutesTestApp'
+    assert_includes error.message, 'RoutesTestOtherApp'
+    assert_includes error.message, '--app='
+  end
+
+  def test_dash_dash_app_disambiguates_between_multiple_loaded_applications
+    write_fixture('app.rb', <<~RUBY)
+      class RoutesTestApp < Prism::Application
+        root to: 'posts#index'
+      end
+      class RoutesTestOtherApp < Prism::Application
+        root to: 'comments#index'
+      end
+    RUBY
+
+    output = run_routes(['--require=app.rb', '--app=RoutesTestOtherApp'])
+    assert_includes output, 'comments#index'
+    refute_includes output, 'posts#index'
+  end
+
+  def test_unknown_option_raises_usage_error
+    assert_raises(Prism::Cli::UsageError) { @cli.routes(['--bogus'], out: StringIO.new) }
+  end
+
+  def test_run_dispatches_routes_command
+    write_fixture('app.rb', <<~RUBY)
+      class RoutesTestApp < Prism::Application
+        root to: 'posts#index'
+      end
+    RUBY
+
+    out = StringIO.new
+    original_stdout = $stdout
+    $stdout = out
+    begin
+      @cli.run(['routes', "--require=#{File.join(@workdir, 'app.rb')}"])
+    ensure
+      $stdout = original_stdout
+    end
+    assert_includes out.string, 'posts#index'
+  end
+end