diff --git a/formular.gemspec b/formular.gemspec
index 054eb81..0053cf6 100644
--- a/formular.gemspec
+++ b/formular.gemspec
@@ -26,6 +26,8 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "trailblazer-cells"
   spec.add_development_dependency "cells-slim"
   spec.add_development_dependency "cells-erb"
+  spec.add_development_dependency "cells-haml"
+  spec.add_development_dependency "actionview"
   spec.add_development_dependency "minitest"
   spec.add_development_dependency "minitest-line"
 end
diff --git a/lib/formular/helper.rb b/lib/formular/helper.rb
index 5e552f0..bcddc99 100644
--- a/lib/formular/helper.rb
+++ b/lib/formular/helper.rb
@@ -1,5 +1,5 @@
 module Formular
-  # TODO: indirectly tested in erb_test and slim_test. Should probably test directly
+  # TODO: indirectly tested in erb_test, haml_test and slim_test. Should probably test directly
   module Helper
     def form(model, url, **options, &block)
       form_options = options
diff --git a/test/fixtures/comment/haml/show/view/show.haml b/test/fixtures/comment/haml/show/view/show.haml
new file mode 100644
index 0000000..750f486
--- /dev/null
+++ b/test/fixtures/comment/haml/show/view/show.haml
@@ -0,0 +1,17 @@
+%div New
+= form(model, "/posts", path_prefix: :comment) do |f|
+  - capture_haml do
+    = f.input :id
+    = f.textarea :body
+    = f.checkbox :public, value: true
+    = f.collection :replies do |reply|
+      - capture_haml do
+        = reply.input :content
+    = f.nested :owner do |owner|
+      - capture_haml do
+        = owner.input :name
+        = owner.input :email
+    = f.input :uuid
+    = f.submit value: "Submit"
+
+
diff --git a/test/haml_test.rb b/test/haml_test.rb
new file mode 100644
index 0000000..c56bb30
--- /dev/null
+++ b/test/haml_test.rb
@@ -0,0 +1,49 @@
+require 'test_helper'
+require 'formular/helper'
+require 'trailblazer/cell'
+require 'cell/haml'
+
+class Comment::Haml
+  class Show < Trailblazer::Cell
+    include Cell::Haml
+    include Formular::Helper
+
+    self.view_paths = ['test/fixtures']
+
+    def show
+      render view: :show
+    end
+
+  end
+end
+
+class HamlTest < Minitest::Spec
+  describe 'valid, initial rendering' do
+    let(:model) { Comment.new(1, 'Nice!', [Reply.new(1, 'some exciting words'), Reply.new], Owner.new(1, 'Joe Blog', 'joe@somewhere.com'), '0x', true) }
+
+    it do
+      Comment::Haml::Show.new(model).().must_equal %(<div>New</div>\n<form action=\"/posts\" method=\"post\" accept-charset=\"utf-8\"><input name=\"utf8\" type=\"hidden\" value=\"✓\"/><input name=\"comment[id]\" id=\"comment_id\" value=\"1\" type=\"text\"/>\n<textarea name=\"comment[body]\" id=\"comment_body\">Nice!</textarea>\n<input value=\"0\" name=\"comment[public]\" type=\"hidden\"/><input value=\"true\" name=\"comment[public]\" id=\"comment_public\" type=\"checkbox\" checked=\"checked\"/>\n<input name=\"comment[replies][][content]\" id=\"comment_replies_0_content\" value=\"some exciting words\" type=\"text\"/>\n<input name=\"comment[replies][][content]\" id=\"comment_replies_1_content\" type=\"text\"/>\n<input name=\"comment[owner][name]\" id=\"comment_owner_name\" value=\"Joe Blog\" type=\"text\"/>\n<input name=\"comment[owner][email]\" id=\"comment_owner_email\" value=\"joe@somewhere.com\" type=\"text\"/>\n<input name=\"comment[uuid]\" id=\"comment_uuid\" value=\"0x\" type=\"text\"/>\n<input value=\"Submit\" type=\"submit\"/>\n</form>)
+    end
+  end
+end
+
+#   describe "with errors" do
+#     let (:model) do
+#       F5::Form.new(Comment.new(nil, "hang ten in east berlin", []))
+#     end
+#
+#     before { model.validate({}) }
+#
+#     it do
+#       Comment::HamlCell.new(model).().must_eq %{<New></New><form action="/posts">ID
+# <input type="text" name="id" id="form_id" value="" />
+# <textarea class="error" name="body" id="form_body">
+# hang ten in east berlin
+# </textarea>
+# <small class="error">["body size cannot be greater than 10"]</small>
+# <input type="button" value="Submit" />
+# <input class="error" type="text" value="0x" name="uuid" id="form_uuid" /><small class="error">["uuid must be filled"]</small>
+# </form>}
+#     end
+#   end
+# end