diff --git a/lib/trailblazer/test/testing.rb b/lib/trailblazer/test/testing.rb
index 1e96fac..b5da607 100644
--- a/lib/trailblazer/test/testing.rb
+++ b/lib/trailblazer/test/testing.rb
@@ -39,9 +39,12 @@ class Form < Reform::Form
           step :parse_tag_list
           step Contract::Persist()
 
-          def capture(ctx, **)
-            ctx[:captured] = CU.inspect(ctx.to_h)
+          module Capture
+            def capture(ctx, **)
+              ctx[:captured] = CU.inspect(ctx.to_h)
+            end
           end
+          include Capture
 
           def parse_tag_list(ctx, **)
             tag_list = ctx["contract.default"].tag_list or return true
diff --git a/test/suite_test.rb b/test/suite_test.rb
index 19ee68a..5ff083c 100644
--- a/test/suite_test.rb
+++ b/test/suite_test.rb
@@ -16,6 +16,16 @@ def call
         # let(:default_ctx) { {params: {memo: {title: "Note to self", content: "Remember me!"}}} }
         # let(:expected_attributes) { {content: "Remember me!", persisted?: true} }
         # let(:key_in_params) { :memo }
+  # it "{#assert_pass} with {:model_at" do
+  #   test = Class.new(Test) do
+  #     Trailblazer::Test::Assertion.module!(self, suite: true)
+
+  #       let(:operation) { Memo::Operation::Create }
+  #       let(:default_ctx) { {params: {memo: {title: "Note to self", content: "Remember me!"}}} }
+  #       let(:expected_attributes) { {title: "Note to self", content: "Remember me!"} }
+  #       let(:key_in_params) { :memo }
+  #   end
+  # end
 
   it "#assert_pass" do
 # FIXME: test that assert_* returns {ctx}
@@ -134,7 +144,24 @@ def call
 )
         end
 
-          vvvvvvvvv
+        Test_for_ModelAt = describe ":model_at" do
+          let(:operation) do
+            Class.new(Trailblazer::Operation) do
+              include Memo::Operation::Create::Capture
+              step :capture
+              step :model
+
+              def model(ctx, params:, **)
+                ctx[:record] = Memo.new(**params[:memo])
+              end
+            end
+          end
+
+          # 01
+          it do
+            @result = assert_pass({title: "Done"}, {title: "Done"}, model_at: :record)
+          end
+        end
 
         # test_0006_anonymous
         # We accept {:model_at} as a first level kw arg, currently.
@@ -208,6 +235,8 @@ def assert_test_case_fails(test, number, error_message)
     assert_test_case_passes(test, "09", input)
     assert_test_case_passes(test, "10", input)
 
+    assert_test_case_passes(Test_for_ModelAt, "01", %({:params=>{:memo=>{:title=>\"Done\", :content=>\"Remember me!\"}}}))
+