diff --git a/lib/trailblazer/test.rb b/lib/trailblazer/test.rb
index 828096f..296ee15 100644
--- a/lib/trailblazer/test.rb
+++ b/lib/trailblazer/test.rb
@@ -3,6 +3,10 @@
 module Trailblazer
   module Test
     # Your code goes here...
+
+    def self.module!(*args, **options, &block)
+      Assertion.module!(*args, **options, &block)
+    end
   end
 end
 
diff --git a/test/activity_test.rb b/test/activity_test.rb
index 6036960..4ee3f19 100644
--- a/test/activity_test.rb
+++ b/test/activity_test.rb
@@ -3,7 +3,7 @@
 # Test all assertions with a FastTrack class, not an Operation.
 # TODO: This is currently not documented.
 class AssertionActivityTest < Minitest::Spec
-  Trailblazer::Test::Assertion.module!(self, activity: true)
+  Trailblazer::Test.module!(self, activity: true)
   Memo = Trailblazer::Test::Testing::Memo
   VALID_INPUT = Memo::VALID_INPUT # {params: {memo: {title: "TODO", content: "Stock up beer"}}}
   WTF_SUCCESS = %(AssertionActivityTest::Create
@@ -73,7 +73,7 @@ class Create < Trailblazer::Activity::FastTrack
 
 # Test with the Assertion::Suite "DSL" module.
 class SuiteWithActivityTest < Minitest::Spec
-  Trailblazer::Test::Assertion.module!(self, activity: true, suite: true)
+  Trailblazer::Test.module!(self, activity: true, suite: true)
   Create = AssertionActivityTest::Create
 
   let(:operation) { Create }
@@ -107,7 +107,7 @@ class EndpointWithActivityTest < Minitest::Spec
   Create = AssertionActivityTest::Create
   Memo = Trailblazer::Test::Testing::Memo
 
-  Trailblazer::Test::Assertion.module!(self, activity: true)
+  Trailblazer::Test.module!(self, activity: true)
 
   def self.__(activity, options, **kws, &block) # TODO: move this to endpoint.
     signal, (ctx, flow_options) = Trailblazer::Endpoint::Runtime.(
diff --git a/test/assertion_test.rb b/test/assertion_test.rb
index e8d09fd..73b0a70 100644
--- a/test/assertion_test.rb
+++ b/test/assertion_test.rb
@@ -2,13 +2,13 @@
 
 class AssertionsTest < Minitest::Spec
   # UNCOMMENT for quick debugging.
-  # Trailblazer::Test::Assertion.module!(self)
+  # Trailblazer::Test.module!(self)
   it "#assert_pass" do
 # assert_pass? Create, {params: {title: "Somewhere Far Beyond"}}, title: "Somewhere Far Beyond"
 
     test =
       Class.new(Test) do
-        Trailblazer::Test::Assertion.module!(self)
+        Trailblazer::Test.module!(self)
         Memo = Trailblazer::Test::Testing::Memo
         Create = Memo::Operation::Create
 
@@ -172,7 +172,7 @@ def model(ctx, params:, **)
 
     test =
       Class.new(Test) do
-        Trailblazer::Test::Assertion.module!(self)
+        Trailblazer::Test.module!(self)
         Memo = Trailblazer::Test::Testing::Memo
         Create = Memo::Operation::Create
         VALID_INPUT = Memo::VALID_INPUT # {params: {memo: {title: "TODO", content: "Stock up beer"}}}
diff --git a/test/docs/assertion_test.rb b/test/docs/assertion_test.rb
index 70b30bd..417c395 100644
--- a/test/docs/assertion_test.rb
+++ b/test/docs/assertion_test.rb
@@ -2,7 +2,7 @@
 
 # Document {Assertion#asserr_pass} and friends.
 class DocsAssertionTest < Minitest::Spec
-  Trailblazer::Test::Assertion.module!(self)
+  Trailblazer::Test.module!(self)
 
   Memo = Trailblazer::Test::Testing::Memo
 
@@ -74,7 +74,7 @@ class DocsAssertionTest < Minitest::Spec
   end
 
   class ModelAtTest < Minitest::Spec
-    Trailblazer::Test::Assertion.module!(self)
+    Trailblazer::Test.module!(self)
 
     module Memo
       module Operation
diff --git a/test/docs/mock_step_test.rb b/test/docs/mock_step_test.rb
index f1aa2ac..c7591c7 100644
--- a/test/docs/mock_step_test.rb
+++ b/test/docs/mock_step_test.rb
@@ -1,7 +1,7 @@
 require "test_helper"
 
 class MockStepTest < Minitest::Spec
-  Trailblazer::Test::Assertion.module!(self)
+  Trailblazer::Test.module!(self)
 
   Memo = Module.new
 
diff --git a/test/docs/suite_test.rb b/test/docs/suite_test.rb
index 9f0e549..167e190 100644
--- a/test/docs/suite_test.rb
+++ b/test/docs/suite_test.rb
@@ -4,14 +4,14 @@
 # ...
 
 class OperationSpec < Minitest::Spec
-  Trailblazer::Test::Assertion.module!(self, suite: true)
+  Trailblazer::Test.module!(self, suite: true)
 end
 #:operation-spec end
 
 # {Memo}, {Memo::Operation::Create} etc is from lib/trailblazer/test/testing.rb.
 class DocsSuiteAssertionsTest < Minitest::Spec
   Memo = Trailblazer::Test::Testing::Memo
-  Trailblazer::Test::Assertion.module!(self, suite: true)
+  Trailblazer::Test.module!(self, suite: true)
 
   Memo::Operation::Update = Class.new(Memo::Operation::Create)
 
@@ -19,7 +19,7 @@ class DocsSuiteAssertionsTest < Minitest::Spec
   #:install
   class MemoOperationTest < Minitest::Spec  # test/memo/operation_test.rb
     #~zoom
-    Trailblazer::Test::Assertion.module!(self, suite: true)
+    Trailblazer::Test.module!(self, suite: true)
   #:install end
 
     # The default ctx passed into the tested operation.
@@ -275,7 +275,7 @@ class Create < Trailblazer::Operation
 # Test that the Suite module also works with a Minitest::Test class.
 #:test-suite
 class MemoCreateTest < Minitest::Test
-  Trailblazer::Test::Assertion.module!(self, suite: true, spec: false)
+  Trailblazer::Test.module!(self, suite: true, spec: false)
   #~skip
   Memo = Trailblazer::Test::Testing::Memo
   #~skip end
diff --git a/test/suite_test.rb b/test/suite_test.rb
index 2745938..2b94b98 100644
--- a/test/suite_test.rb
+++ b/test/suite_test.rb
@@ -3,7 +3,7 @@
 # Brutal unit tests for Suite.
 class SuiteTest < Minitest::Spec
   # UNCOMMENT for quick debugging.
-  # Trailblazer::Test::Assertion.module!(self, suite: true)
+  # Trailblazer::Test.module!(self, suite: true)
   # let(:operation) { Trailblazer::Test::Testing::Memo::Operation::Create }
   # let(:default_ctx) { {params: {memo: {title: "Note to self", content: "Remember me!"}}} }
   # let(:expected_attributes) { {content: "Remember me!", persisted?: true} }
@@ -21,7 +21,7 @@ class SuiteTest < Minitest::Spec
         # 2. Test result's arity by running assert_pass with a failing OP.
         # 3. test different manual input vs different expected_attributes to see if all attributes are tested.
 
-        Trailblazer::Test::Assertion.module!(self, suite: true)
+        Trailblazer::Test.module!(self, suite: true)
 
         let(:operation) { Memo::Operation::Create }
         let(:default_ctx) { {params: {memo: {title: "Note to self", content: "Remember me!"}}} }
@@ -420,7 +420,7 @@ def model(ctx, params:, **)
 # Test that the Suite module also works with a Minitest::Test class.
 # DISCUSS: should we use the above test tactics and test this inside a test with {#assert_test_case_passes} etc?
 class SuiteInNonSpecTest < Minitest::Test
-  Trailblazer::Test::Assertion.module!(self, suite: true, spec: false)
+  Trailblazer::Test.module!(self, suite: true, spec: false)
 
   Memo = Trailblazer::Test::Testing::Memo
 
@@ -436,7 +436,7 @@ def test_our_assertions
 end
 
 # class AssertionActivityTest < Minitest::Spec
-#   Trailblazer::Test::Assertion.module!(self, activity: true)
+#   Trailblazer::Test.module!(self, activity: true)
 
 #   Record = Trailblazer::Test::Testing::Memo
 
@@ -468,7 +468,7 @@ def test_our_assertions
 
 # # Test with the Assertion::Suite "DSL" module.
 # class SuiteWithActivityTest < Minitest::Spec
-#   Trailblazer::Test::Assertion.module!(self, activity: true, suite: true)
+#   Trailblazer::Test.module!(self, activity: true, suite: true)
 #   # Record = AssertionsTest::Record
 #   # Create = AssertionActivityTest::Create