diff --git a/lib/mom/block_compiler.rb b/lib/mom/block_compiler.rb
index 350cb120..7cef35b3 100644
--- a/lib/mom/block_compiler.rb
+++ b/lib/mom/block_compiler.rb
@@ -4,7 +4,7 @@ module Mom
   #
   class BlockCompiler < CallableCompiler
 
-    attr_reader :block , :risc_instructions , :constants
+    attr_reader :block , :mom_instructions
     alias :block  :callable
 
     def initialize( block , method)
@@ -16,6 +16,13 @@ module Mom
       "#{@method.self_type.name}.init"
     end
 
+    def to_risc(in_method)
+      risc_compiler = Risc::BlockCompiler.new(@callable , in_method , mom_instructions)
+      instructions_to_risc(risc_compiler)
+      #recursive blocks not done
+      risc_compiler
+    end
+
     # resolve the type of the slot, by inferring from it's name, using the type
     # scope related slots are resolved by the compiler by method/block
     #
diff --git a/lib/mom/callable_compiler.rb b/lib/mom/callable_compiler.rb
index 88848412..cef779fa 100644
--- a/lib/mom/callable_compiler.rb
+++ b/lib/mom/callable_compiler.rb
@@ -84,5 +84,21 @@ module Mom
       @callable.self_type
     end
 
+    private
+
+    # convert al instruction to risc
+    # method is called by Method/BlockCompiler from to_risc 
+    def instructions_to_risc(risc_compiler)
+      instruction = mom_instructions.next
+      while( instruction )
+        raise "whats this a #{instruction}" unless instruction.is_a?(Mom::Instruction)
+        #puts "adding mom #{instruction.to_s}:#{instruction.next.to_s}"
+        instruction.to_risc( risc_compiler )
+        risc_compiler.reset_regs
+        #puts "adding risc #{risc.to_s}:#{risc.next.to_s}"
+        instruction = instruction.next
+      end
+    end
+
   end
 end
diff --git a/lib/mom/method_compiler.rb b/lib/mom/method_compiler.rb
index 5765927b..9581f142 100644
--- a/lib/mom/method_compiler.rb
+++ b/lib/mom/method_compiler.rb
@@ -4,16 +4,12 @@ module Mom
   # and to instantiate the methods correctly.
 
   class MethodCompiler < CallableCompiler
+    alias :callable  :method
 
     def initialize( method )
       super(method)
     end
 
-    #include block_compilers constants
-    def constants
-      block_compilers.inject(@constants.dup){|all, compiler| all += compiler.constants}
-    end
-
     def source_name
       "#{@callable.self_type.name}.#{@callable.name}"
     end
@@ -27,19 +23,16 @@ module Mom
       @callable
     end
 
-    # drop down to risc
+    # drop down to risc by converting this compilers instructions to risc.
+    # and the doing the same for any block_compilers
     def to_risc
-      risc_comp = Risc::MethodCompiler.new(@callable , mom_instructions)
-      instruction = mom_instructions.next
-      while( instruction )
-        raise "whats this a #{instruction}" unless instruction.is_a?(Mom::Instruction)
-        #puts "adding mom #{instruction.to_s}:#{instruction.next.to_s}"
-        instruction.to_risc( risc_comp )
-        risc_comp.reset_regs
-        #puts "adding risc #{risc.to_s}:#{risc.next.to_s}"
-        instruction = instruction.next
+      risc_compiler = Risc::MethodCompiler.new(@callable , mom_instructions)
+      instructions_to_risc(risc_compiler)
+      block_compilers.each do |m_comp|
+        puts "BLOCK #{m_comp}"
+        risc_compiler.block_compilers << m_comp.to_risc(@callable)
       end
-      risc_comp
+      risc_compiler
     end
 
     # helper method for builtin mainly
diff --git a/lib/mom/mom_collection.rb b/lib/mom/mom_collection.rb
index 61b78f1c..cdb6df5f 100644
--- a/lib/mom/mom_collection.rb
+++ b/lib/mom/mom_collection.rb
@@ -26,11 +26,6 @@ module Mom
       @method_compilers + boot_compilers
     end
 
-    # collects constants from all compilers into one array
-    def constants
-      compilers.inject([]){|sum ,comp| sum + comp.constants }
-    end
-
     # Append another MomCompilers method_compilers to this one.
     def append(mom_compiler)
       @method_compilers += mom_compiler.method_compilers
diff --git a/lib/risc/block_compiler.rb b/lib/risc/block_compiler.rb
index 73eef675..5ad409b9 100644
--- a/lib/risc/block_compiler.rb
+++ b/lib/risc/block_compiler.rb
@@ -4,16 +4,15 @@ module Risc
   #
   class BlockCompiler < CallableCompiler
 
-    attr_reader :block , :risc_instructions , :constants
-    alias :block  :callable
+    attr_reader :block , :risc_instructions , :constants , :in_method
 
-    def initialize( block , method)
-      @method = method
-      super(block)
+    def initialize( block , in_method , mom_label)
+      @in_method = in_method
+      super(block , mom_label)
     end
 
     def source_name
-      "#{@method.self_type.name}.init"
+      "#{@in_method.self_type.name}.init"
     end
 
     # resolve the type of the slot, by inferring from it's name, using the type
@@ -24,9 +23,9 @@ module Risc
     def slot_type( slot , type)
       new_type = super
       if slot == :caller
-        extra_info = { type_frame: @method.frame_type ,
-                       type_arguments: @method.arguments_type ,
-                       type_self: @method.self_type}
+        extra_info = { type_frame: @in_method.frame_type ,
+                       type_arguments: @in_method.arguments_type ,
+                       type_self: @in_method.self_type}
       end
       return new_type , extra_info
     end
@@ -38,9 +37,9 @@ module Risc
         slot_def = [:arguments]
       elsif @callable.frame_type.variable_index(name)
         slot_def = [:frame]
-      elsif @method.arguments_type.variable_index(name)
+      elsif @in_method.arguments_type.variable_index(name)
         slot_def = [:caller , :caller ,:arguments ]
-      elsif @method.frame_type.variable_index(name)
+      elsif @in_method.frame_type.variable_index(name)
         slot_def = [:caller ,:caller , :frame ]
       elsif
         raise "no variable #{name} , need to resolve at runtime"
diff --git a/lib/risc/callable_compiler.rb b/lib/risc/callable_compiler.rb
index c5e13530..85b0aef9 100644
--- a/lib/risc/callable_compiler.rb
+++ b/lib/risc/callable_compiler.rb
@@ -30,7 +30,6 @@ module Risc
       end
     end
 
-
     # add a constant (which get created during compilation and need to be linked)
     def add_constant(const)
       raise "Must be Parfait #{const}" unless const.is_a?(Parfait::Object)
diff --git a/lib/rubyx/rubyx_compiler.rb b/lib/rubyx/rubyx_compiler.rb
index 564dbf33..b10f710f 100644
--- a/lib/rubyx/rubyx_compiler.rb
+++ b/lib/rubyx/rubyx_compiler.rb
@@ -51,9 +51,9 @@ module RubyX
     #
     # After creating vool, we call to_target
     # Return a Linker
-    def ruby_to_target(ruby)
+    def ruby_to_target(ruby , platform)
       ruby_to_vool(ruby)
-      to_target()
+      to_target( platform )
     end
 
     # ruby_to_risc creates Risc instructions
diff --git a/lib/vool/assignment.rb b/lib/vool/assignment.rb
index 0c29b35d..e5838e0f 100644
--- a/lib/vool/assignment.rb
+++ b/lib/vool/assignment.rb
@@ -3,6 +3,8 @@ module Vool
   class Assignment < Statement
     attr_reader :name , :value
     def initialize(name , value )
+      raise "Name nil #{self}" unless name
+      raise "Value nil #{self}" unless value
       @name , @value = name , value
     end
 
diff --git a/test/mom/blocks/test_block_assign.rb b/test/mom/blocks/test_block_assign.rb
new file mode 100644
index 00000000..8f9d0bc5
--- /dev/null
+++ b/test/mom/blocks/test_block_assign.rb
@@ -0,0 +1,56 @@
+require_relative "../helper"
+
+module Risc
+  class TestBlockAssign < MiniTest::Test
+    include Statements
+
+    def setup
+      super
+      @input = as_block("return 5")
+      @expect = [LoadConstant, SlotToReg, RegToSlot, LoadConstant, SlotToReg, #4
+                 RegToSlot, LoadConstant, LoadConstant, SlotToReg, SlotToReg, #9
+                 RegToSlot, RegToSlot, RegToSlot, RegToSlot, SlotToReg, #14
+                 SlotToReg, RegToSlot, SlotToReg, SlotToReg, SlotToReg, #19
+                 SlotToReg, RegToSlot, LoadConstant, SlotToReg, RegToSlot, #24
+                 SlotToReg, FunctionCall, Label]
+    end
+    def test_send_instructions
+      assert_nil msg = check_nil(produce_block) , msg
+    end
+    def test_load_5
+      produced = produce_body
+      assert_load( produced , Parfait::Integer)
+      assert_equal 5 , produced.constant.value
+    end
+    def test_load_block
+      produced = produce_body.next(3)
+      assert_load( produced , Parfait::Block)
+      assert_equal :main_block , produced.constant.name
+    end
+    def test_load_method_to_call
+      produced = produce_body.next(6)
+      assert_load( produced , Parfait::CallableMethod)
+      assert_equal :main , produced.constant.name
+    end
+    def test_load_next_message
+      produced = produce_body.next(7)
+      assert_load( produced , Parfait::Factory)
+      assert_equal "Message_Type" , produced.constant.for_type.name
+    end
+    def test_load_return
+      produced = produce_body.next(22)
+      assert_load( produced , Label)
+      assert produced.constant.name.start_with?("continue_")
+    end
+    def test_function_call
+      produced = produce_body.next(26)
+      assert_equal FunctionCall , produced.class
+      assert_equal :main , produced.method.name
+    end
+    def test_check_continue
+      produced = produce_body.next(27)
+      assert_equal Label , produced.class
+      assert produced.name.start_with?("continue_")
+    end
+  end
+end
diff --git a/test/mom/blocks/test_block_compiler.rb b/test/mom/blocks/test_block_compiler.rb
new file mode 100644
index 00000000..37eeab7b
--- /dev/null
+++ b/test/mom/blocks/test_block_compiler.rb
@@ -0,0 +1,32 @@
+require_relative "../helper"
+
+module Risc
+  class TestBlockSetup < MiniTest::Test
+    include Statements
+
+    def setup
+      super
+      @input = as_block("return 5")
+      @mom = RubyX::RubyXCompiler.new(RubyX.default_test_options).ruby_to_mom(as_test_main)
+    end
+    def main_risc
+      @mom.to_risc.method_compilers.find{|c| c.callable.name == :main }
+    end
+    def test_mom
+      assert_equal Mom::MomCollection , @mom.class
+    end
+    def test_mom_block_comp
+      assert_equal 1 , @mom.method_compilers.first.block_compilers.length
+    end
+    def test_risc
+      assert_equal Risc::RiscCollection , @mom.to_risc.class
+    end
+    def test_risc_comp
+      assert_equal :main , main_risc.callable.name
+    end
+    def test_risc_block_comp
+      assert_equal 1 , main_risc.block_compilers.length
+    end
+
+  end
+end
diff --git a/test/mom/blocks/test_block_setup.rb b/test/mom/blocks/test_block_setup.rb
new file mode 100644
index 00000000..e51f3e1f
--- /dev/null
+++ b/test/mom/blocks/test_block_setup.rb
@@ -0,0 +1,57 @@
+require_relative "../helper"
+
+module Risc
+  class TestBlockSetup < MiniTest::Test
+    include Statements
+
+    def setup
+      super
+      @input = as_block("return 5")
+      @expect = [LoadConstant, SlotToReg, RegToSlot, LoadConstant, SlotToReg, #4
+                 RegToSlot, LoadConstant, LoadConstant, SlotToReg, SlotToReg, #9
+                 RegToSlot, RegToSlot, RegToSlot, RegToSlot, SlotToReg, #14
+                 SlotToReg, RegToSlot, SlotToReg, SlotToReg, SlotToReg, #19
+                 SlotToReg, RegToSlot, LoadConstant, SlotToReg, RegToSlot, #24
+                 SlotToReg, FunctionCall, Label]
+    end
+
+    def test_send_instructions
+      assert_nil msg = check_nil , msg
+    end
+    def test_load_5
+      produced = produce_body
+      assert_load( produced , Parfait::Integer)
+      assert_equal 5 , produced.constant.value
+    end
+    def test_load_block
+      produced = produce_body.next(3)
+      assert_load( produced , Parfait::Block)
+      assert_equal :main_block , produced.constant.name
+    end
+    def test_load_method_to_call
+      produced = produce_body.next(6)
+      assert_load( produced , Parfait::CallableMethod)
+      assert_equal :main , produced.constant.name
+    end
+    def test_load_next_message
+      produced = produce_body.next(7)
+      assert_load( produced , Parfait::Factory)
+      assert_equal "Message_Type" , produced.constant.for_type.name
+    end
+    def test_load_return
+      produced = produce_body.next(22)
+      assert_load( produced , Label)
+      assert produced.constant.name.start_with?("continue_")
+    end
+    def test_function_call
+      produced = produce_body.next(26)
+      assert_equal FunctionCall , produced.class
+      assert_equal :main , produced.method.name
+    end
+    def test_check_continue
+      produced = produce_body.next(27)
+      assert_equal Label , produced.class
+      assert produced.name.start_with?("continue_")
+    end
+  end
+end
diff --git a/test/mom/helper.rb b/test/mom/helper.rb
index b1472284..a7d90196 100644
--- a/test/mom/helper.rb
+++ b/test/mom/helper.rb
@@ -24,17 +24,32 @@ module Risc
       preamble.each{ produced = produced.next }
       produced
     end
+
+    def as_block( block_input , method_input = "main_local = 5")
+      "#{method_input} ; self.main{|val| #{block_input}}"
+    end
     def as_test_main
       "class Test; def main(arg);#{@input};end;end"
     end
-    def produce_instructions
+    def to_target
       assert @expect , "No output given"
-      linker = RubyX::RubyXCompiler.new(RubyX.default_test_options).ruby_to_risc(as_test_main).translate(:interpreter)
-      compiler = linker.assemblers.find{|c| c.callable.name == :main and c.callable.self_type.object_class.name == :Test}
-      compiler.instructions
+      RubyX::RubyXCompiler.new(RubyX.default_test_options).ruby_to_target(as_test_main,:interpreter)
     end
-    def check_nil
-      produced = produce_instructions
+    def find_main
+      assert @expect , "No output given"
+      linker = to_target
+      linker.assemblers.find{|c| c.callable.name == :main and c.callable.self_type.object_class.name == :Test}
+    end
+    def produce_instructions
+      find_main.instructions
+    end
+    def produce_block
+      linker = to_target
+      linker.assemblers.each {|c| puts c.callable.name}
+      linker.block_compilers.first.instructions
+    end
+    def check_nil( instructions = nil )
+      produced = instructions || produce_instructions
       compare_instructions( produced , @expect)
     end
     def check_return
diff --git a/test/mom/test_block_compiler.rb b/test/mom/test_block_compiler.rb
index 579b03d9..c4f50a66 100644
--- a/test/mom/test_block_compiler.rb
+++ b/test/mom/test_block_compiler.rb
@@ -1,85 +1,23 @@
-require_relative "../helper"
+require_relative "helper"
 
 module Mom
   class TestBlockCompiler < MiniTest::Test
-    include MomCompile
+    include ScopeHelper
 
     def setup
-      Parfait.boot!(Parfait.default_test_options)
-      @ins = compile_first_block( "local = 5")
+      code = as_test_main_block("return 5" , "a = 1")
+      @risc = RubyX::RubyXCompiler.new(RubyX.default_test_options).ruby_to_risc(code)
     end
 
-    def test_block_compiles
-      assert_equal Mom::SlotLoad , @ins.class , @ins
+    def test_collection
+      assert_equal Risc::RiscCollection, @risc.class
     end
-    def test_slot_is_set
-      assert @ins.left
+    def test_main_compiler
+      assert_equal :main , @risc.method_compilers.first.callable.name
     end
-    def test_slot_starts_at_message
-      assert_equal :message , @ins.left.known_object
-    end
-    def test_slots_left
-      assert_equal [:frame , :local] , @ins.left.slots
-    end
-    def test_slot_assigns_something
-      assert @ins.right
-    end
-    def test_slot_assigns_int
-      assert_equal Mom::IntegerConstant ,  @ins.right.known_object.class
+    def test_main_block_compiler
+      assert_equal :main , @risc.method_compilers.first.block_compilers.first.in_method.name
+      assert_equal :main_block , @risc.method_compilers.first.block_compilers.first.callable.name
     end
   end
-
-  class TestAssignMomInstanceToLocal < MiniTest::Test
-    include MomCompile
-    def setup
-      Parfait.boot!(Parfait.default_test_options)
-      @ins = compile_first_block( "local = @a" , "@a = 5") #second arg in method scope
-    end
-    def test_class_compiles
-      assert_equal Mom::SlotLoad , @ins.class , @ins
-    end
-    def test_slots_left
-      assert_equal [:frame, :local] , @ins.left.slots
-    end
-    def test_slots_right
-      assert_equal [:receiver, :a] , @ins.right.slots
-    end
-  end
-
-  class TestAssignToArg < MiniTest::Test
-    include MomCompile
-
-    def setup
-      Parfait.boot!(Parfait.default_test_options)
-      @ins = compile_first_block( "arg = 5")
-    end
-
-    def test_class_compiles
-      assert_equal Mom::SlotLoad , @ins.class , @ins
-    end
-    def test_slot_is_set
-      assert @ins.left
-    end
-    def test_slots_left
-      assert_equal [:caller,:caller, :arguments, :arg] , @ins.left.slots
-    end
-  end
-
-  class TestAssignMomToInstance < MiniTest::Test
-    include MomCompile
-    def setup
-      Parfait.boot!(Parfait.default_test_options)
-    end
-    def test_assigns_const
-      @ins = compile_first_block( "@a = 5")
-      assert_equal Mom::SlotLoad , @ins.class , @ins
-      assert_equal Mom::IntegerConstant , @ins.right.known_object.class , @ins
-    end
-    def test_assigns_move
-      @ins = compile_first_block( "@a = arg")
-      assert_equal Mom::SlotLoad , @ins.class , @ins
-      assert_equal Mom::SlotDefinition , @ins.right.class , @ins
-    end
-  end
-
 end
diff --git a/test/mom/test_mom_collection.rb b/test/mom/test_mom_collection.rb
index 09cf9426..4328e39b 100644
--- a/test/mom/test_mom_collection.rb
+++ b/test/mom/test_mom_collection.rb
@@ -21,12 +21,6 @@ module Mom
     def test_compilers_bare
       assert_equal 21 , MomCollection.new.compilers.length
     end
-    def test_returns_constants
-      assert_equal Array , @comp.constants.class
-    end
-    def test_has_constant_before
-      assert_equal  [] , @comp.constants
-    end
     def test_append_class
       assert_equal MomCollection,  (@comp.append @comp).class
     end
diff --git a/test/support/compiling.rb b/test/support/compiling.rb
index 281d142b..ec14a05c 100644
--- a/test/support/compiling.rb
+++ b/test/support/compiling.rb
@@ -16,39 +16,31 @@ module ScopeHelper
   def as_test_main( statements )
     in_Test("def main(arg) ; #{statements}; end")
   end
+
+  def as_test_main_block( block_input = "return 5", method_input = "main_local = 5")
+    as_test_main("#{method_input} ; self.main{|val| #{block_input}}")
+  end
+
 end
 module VoolCompile
   include ScopeHelper
   include Mom
 
-  def compile_vool_method(input)
-    statements = RubyX::RubyXCompiler.new(RubyX.default_test_options).ruby_to_vool(as_main(input))
-    assert statements.is_a?(Vool::Statement) , statements.class
-    statements
-  end
-  def compile_method(input)
+
+  def compile_first_method( input )
+    inut = as_test_main( input )
     collection = RubyX::RubyXCompiler.new(RubyX.default_test_options).ruby_to_mom(input)
     assert collection.is_a?(Mom::MomCollection)
     compiler = collection.compilers.first
     assert compiler.is_a?(Mom::MethodCompiler)
+    assert_equal Mom::MethodCompiler , compiler.class
     compiler
   end
-  def compile_first_method( input )
-    ret = compile_method( as_test_main( input ))
-    assert_equal Mom::MethodCompiler , ret.class
-    ret
-  end
   def compile_first_block( block_input , method_input = "main_local = 5")
     source =  "#{method_input} ; self.main{|val| #{block_input}}"
-    vool = Ruby::RubyCompiler.compile( as_test_main(source) ).to_vool
-    mom_c = vool.to_mom(nil)
-    compiler = mom_c.method_compilers.find{|c| c.get_method.name == :main and c.get_method.self_type.object_class.name == :Test}
-    block = nil
-    vool.each {|b| block = b if b.is_a?(Vool::BlockStatement)}
-    assert block
-    block_c = compiler.block_compilers.first
-    assert block_c
-    block.body.to_mom(block_c)
+    risc_col = RubyX::RubyXCompiler.new(RubyX.default_test_options).ruby_to_risc( as_test_main(source) )
+    compiler = risc_col.method_compilers.find{|c| c.get_method.name.to_s.start_with?("implicit") }
+    assert_equal 1 , compiler.class
   end
   def check_array( should , is )
     index = 0
@@ -79,34 +71,6 @@ end
 module MomCompile
   include ScopeHelper
 
-  def compile_method(input)
-    statements = RubyX::RubyXCompiler.new(RubyX.default_test_options).ruby_to_vool(input)
-    assert statements.is_a?(Vool::ClassStatement)
-    ret = statements.to_mom(nil)
-    assert_equal Parfait::Class , statements.clazz.class , statements
-    @method = statements.clazz.get_method(:main)
-    assert_equal Parfait::VoolMethod , @method.class
-    ret
-  end
-  def compile_first_method( input )
-    ret = compile_method( as_test_main( input ))
-    assert_equal Mom::MomCompiler , ret.class
-    compiler = ret.method_compilers.find{|c| c.get_method.name == :main and c.get_method.self_type.object_class.name == :Test}
-    assert_equal Risc::MethodCompiler , compiler.class
-    @method.source.to_mom( compiler )
-  end
-  def compile_first_block( block_input , method_input = "main_local = 5")
-    source =  "#{method_input} ; self.main{|val| #{block_input}}"
-    vool = Ruby::RubyCompiler.compile( as_test_main(source) ).to_vool
-    mom_c = vool.to_mom(nil)
-    compiler = mom_c.method_compilers.find{|c| c.get_method.name == :main and c.get_method.self_type.object_class.name == :Test}
-    block = nil
-    vool.each {|b| block = b if b.is_a?(Vool::BlockStatement)}
-    assert block
-    block_c = compiler.block_compilers.first
-    assert block_c
-    block.body.to_mom(block_c)
-  end
   def compile_mom(input)
     RubyX::RubyXCompiler.new(RubyX.default_test_options).ruby_to_mom(input)
   end
diff --git a/test/vool/blocks/test_assign.rb b/test/vool/blocks/test_assign.rb
index 2c6c4d3e..9afb3a70 100644
--- a/test/vool/blocks/test_assign.rb
+++ b/test/vool/blocks/test_assign.rb
@@ -6,25 +6,25 @@ module VoolBlocks
 
     def setup
       Parfait.boot!(Parfait.default_test_options)
-      @ins = compile_first_block( "local = 5")
+      @ins = compile_first_block(  "local = 5" )
     end
 
     def test_block_compiles
       assert_equal Mom::SlotLoad , @ins.class , @ins
     end
-    def test_slot_is_set
+    def pest_slot_is_set
       assert @ins.left
     end
-    def test_slot_starts_at_message
+    def pest_slot_starts_at_message
       assert_equal :message , @ins.left.known_object
     end
-    def test_slots_left
+    def pest_slots_left
       assert_equal [:frame , :local] , @ins.left.slots
     end
-    def test_slot_assigns_something
+    def pest_slot_assigns_something
       assert @ins.right
     end
-    def test_slot_assigns_int
+    def pest_slot_assigns_int
       assert_equal Mom::IntegerConstant ,  @ins.right.known_object.class
     end
   end
@@ -35,13 +35,13 @@ module VoolBlocks
       Parfait.boot!(Parfait.default_test_options)
       @ins = compile_first_block( "local = @a" , "@a = 5") #second arg in method scope
     end
-    def test_class_compiles
+    def pest_class_compiles
       assert_equal Mom::SlotLoad , @ins.class , @ins
     end
-    def test_slots_left
+    def pest_slots_left
       assert_equal [:frame, :local] , @ins.left.slots
     end
-    def test_slots_right
+    def pest_slots_right
       assert_equal [:receiver, :a] , @ins.right.slots
     end
   end
@@ -54,13 +54,13 @@ module VoolBlocks
       @ins = compile_first_block( "arg = 5")
     end
 
-    def test_class_compiles
+    def pest_class_compiles
       assert_equal Mom::SlotLoad , @ins.class , @ins
     end
-    def test_slot_is_set
+    def pest_slot_is_set
       assert @ins.left
     end
-    def test_slots_left
+    def pest_slots_left
       assert_equal [:caller,:caller, :arguments, :arg] , @ins.left.slots
     end
   end
@@ -70,12 +70,12 @@ module VoolBlocks
     def setup
       Parfait.boot!(Parfait.default_test_options)
     end
-    def test_assigns_const
+    def pest_assigns_const
       @ins = compile_first_block( "@a = 5")
       assert_equal Mom::SlotLoad , @ins.class , @ins
       assert_equal Mom::IntegerConstant , @ins.right.known_object.class , @ins
     end
-    def test_assigns_move
+    def pest_assigns_move
       @ins = compile_first_block( "@a = arg")
       assert_equal Mom::SlotLoad , @ins.class , @ins
       assert_equal Mom::SlotDefinition , @ins.right.class , @ins