diff --git a/test/test_transform.rb b/test/test_transform.rb
index 6957616d..206253c3 100644
--- a/test/test_transform.rb
+++ b/test/test_transform.rb
@@ -1,76 +1,78 @@
 require_relative 'helper'
-require 'minitest/spec'
 require 'vm/transform'
 
 include Vm
 
-describe Transform do
-  before do
+class TransformTest <  MiniTest::Test
+
+  def setup
     @transform = Vm::Transform.new
   end
 
-  it 'transforms a number' do
-    input    = {:number => '42'}
-    expected = Vm::NumberExpression.new(42)
-
-    @transform.apply(input).must_equal expected
+  def check_equals
+    is = @transform.apply @input
+    assert_equal @expected.class , is.class
+  end
+  def test_number
+    @input    = {:number => '42'}
+    @expected = Vm::NumberExpression.new(42)
+    check_equals
+    assert_equal 42 , @expected.value
   end
 
-  it 'transforms a name' do
-    input    = {:name => 'foo'}
-    expected = Vm::NameExpression.new('foo')
-
-    @transform.apply(input).must_equal expected
+  def test_name
+    @input    = {:name => 'foo'}
+    @expected = Vm::NameExpression.new('foo')
+    check_equals
   end
 
-  it 'transforms an argument list' do
-    input    = {:args => [{:arg => {:number => '42'}},
+  def test_argument_list
+    @input    = {:args => [{:arg => {:number => '42'}},
                           {:arg => {:name   => 'foo'}}]}
-    expected = [Vm::NumberExpression.new(42),
+    @expected = [Vm::NumberExpression.new(42),
                 Vm::NameExpression.new('foo')]
-
-    @transform.apply(input).must_equal expected
+    check_equals
   end
 
-  it 'transforms a single-argument function call' do
-    input = {:funcall => {:name => 'foo'},
+  def test_single_argument
+    @input = {:funcall => {:name => 'foo'},
              :args    => [{:arg => {:number => '42'}}]}
-    expected = Vm::FuncallExpression.new 'foo', [Vm::NumberExpression.new(42)]
+    @expected = Vm::FuncallExpression.new 'foo', [Vm::NumberExpression.new(42)]
 
-    @transform.apply(input).must_equal expected
+    check_equals
   end
 
-  it 'transforms a multi-argument function call' do
-    input = {:funcall => {:name => 'baz'},
+  def test_multi_argument
+    @input = {:funcall => {:name => 'baz'},
              :args    => [{:arg => {:number => '42'}},
                           {:arg => {:name => 'foo'}}]}
-    expected = Vm::FuncallExpression.new 'baz', [Vm::NumberExpression.new(42),
+    @expected = Vm::FuncallExpression.new 'baz', [Vm::NumberExpression.new(42),
                                           Vm::NameExpression.new('foo')]
 
-    @transform.apply(input).must_equal expected
+    check_equals
   end
 
-  it 'transforms a conditional' do
-    input = {:cond     => {:number => '0'},
+  def test_conditional
+    @input = {:cond     => {:number => '0'},
              :if_true  => {:body => {:number => '42'}},
              :if_false => {:body => {:number => '667'}}}
-    expected = Vm::ConditionalExpression.new \
+    @expected = Vm::ConditionalExpression.new \
       Vm::NumberExpression.new(0),
       Vm::NumberExpression.new(42),
       Vm::NumberExpression.new(667)
 
-    @transform.apply(input).must_equal expected
+    check_equals
   end
 
-  it 'transforms a function definition' do
-    input = {:func   => {:name => 'foo'},
+  def test__function_definition
+    @input = {:func   => {:name => 'foo'},
              :params => {:param => {:name => 'x'}},
              :body   => {:number => '5'}}
-    expected = Vm::FunctionExpression.new \
+    @expected = Vm::FunctionExpression.new \
       'foo',
       [Vm::NameExpression.new('x')],
       Vm::NumberExpression.new(5)
 
-    @transform.apply(input).must_equal expected
+      check_equals
   end
 end