diff --git a/test/risc/position/helper.rb b/test/risc/position/helper.rb
index 4978ff98..f08c549f 100644
--- a/test/risc/position/helper.rb
+++ b/test/risc/position/helper.rb
@@ -9,6 +9,34 @@ module Risc
       4
     end
   end
+  class Machine
+    def set_platform(plat)
+      @platform = plat
+    end
+    def set_translated
+      @translated = true
+      translate_methods( @platform.translator )
+      @cpu_init = risc_init.to_cpu(@platform.translator)
+    end
+  end
+  class DummyPlatform
+    def self.boot
+      machine = Risc.machine.boot
+      machine.set_platform( self.new )
+      machine
+    end
+    def translator
+      DummyTranslator.new
+    end
+    def padding
+      0
+    end
+  end
+  class DummyTranslator
+    def translate(arg)
+      DummyInstruction.new
+    end
+  end
   class DummyInstruction < Dummy
     include Util::List
     def initialize(nekst = nil)
@@ -19,5 +47,11 @@ module Risc
       Position.get(self).trigger_inserted if Position.set?(self)
       ret
     end
+    def assemble(io)
+      io.write_unsigned_int_32(0)
+    end
+    def total_byte_length
+      4
+    end
   end
 end
diff --git a/test/risc/position/test_code_listener1.rb b/test/risc/position/test_code_listener1.rb
index c1c0e556..97bd8c2a 100644
--- a/test/risc/position/test_code_listener1.rb
+++ b/test/risc/position/test_code_listener1.rb
@@ -4,11 +4,13 @@ module Risc
   # tests that require a boot and test propagation
   class TestCodeListenerFull < MiniTest::Test
     def setup
-      Risc.machine.boot
+      #@machine = DummyPlatform.boot
+      @machine = Risc.machine.boot
       @binary = Parfait::BinaryCode.new(1)
       @method = Parfait.object_space.types.values.first.methods
       @label = Risc.label("hi","ho")
-      @machine.translate(:arm)
+      #@machine.set_translated
+      @machine.translate(:interpreter)
       @machine.position_all
     end
     def test_listener_after_extend
diff --git a/test/risc/position/test_instruction_listener1.rb b/test/risc/position/test_instruction_listener1.rb
index c9906a45..8272135f 100644
--- a/test/risc/position/test_instruction_listener1.rb
+++ b/test/risc/position/test_instruction_listener1.rb
@@ -3,9 +3,9 @@ require_relative "helper"
 module Risc
   class TestInstructionListenerBig < MiniTest::Test
     def setup
-      Risc.machine.boot
+      DummyPlatform.boot
       @binary = Parfait::BinaryCode.new(1)
-      @bin_pos = CodeListener.init(@binary,0)
+      @bin_pos = CodeListener.init(@binary).set(0)
       @instruction = DummyInstruction.new
       13.times {@instruction.last.insert(DummyInstruction.new) }
       @position = InstructionListener.init(@instruction , @binary)