diff --git a/test/mom/instruction/helper.rb b/test/mom/instruction/helper.rb
index e527e429..e03adb27 100644
--- a/test/mom/instruction/helper.rb
+++ b/test/mom/instruction/helper.rb
@@ -4,6 +4,9 @@ module Mom
   class CompilerMock
     def use_reg( type )
       Risc.tmp_reg(type , nil)
+    end
+    def reset_regs
+
     end
     def add_constant(c)
     end
diff --git a/test/mom/instruction/test_slot_load.rb b/test/mom/instruction/test_slot_load.rb
index da034898..349f155b 100644
--- a/test/mom/instruction/test_slot_load.rb
+++ b/test/mom/instruction/test_slot_load.rb
@@ -1,13 +1,55 @@
 require_relative "helper"
 
 module Mom
-  class TestSlotLoad < MiniTest::Test
+  class TestSlotLoadBasics < MiniTest::Test
+
+    def test_ins_ok
+      assert SlotLoad.new( [:message, :caller] , [:receiver,:type] )
+    end
+    def test_ins_fail1
+      assert_raises {SlotLoad.new( [:message, :caller] , nil )}
+    end
+    def test_fail_on_right
+      @load = SlotLoad.new( [:message, :caller] , [:receiver,:type] )
+      assert_raises {@load.to_risc(CompilerMock.new)}
+    end
+    def test_fail_on_left_long
+      @load = SlotLoad.new( [:message, :caller , :type] , [:receiver,:type] )
+      assert_raises {@load.to_risc(CompilerMock.new)}
+    end
+  end
+  class TestSlotLoadFunction < MiniTest::Test
 
     def setup
+      Risc.machine.boot
+      @load = SlotLoad.new( [:message, :caller] , [:message,:type] )
+      @compiler = CompilerMock.new
+      @instruction = @load.to_risc(@compiler)
     end
 
-    def test_while_instructions
-      assert_nil nil
+    def test_ins_class
+      assert_equal Risc::SlotToReg , @instruction.class
+    end
+    def test_ins_next_class
+      assert_equal Risc::RegToSlot , @instruction.next.class
+    end
+    def test_ins_arr
+      assert_equal :r0 , @instruction.array.symbol
+    end
+    def test_ins_reg
+      assert_equal :r1 , @instruction.register.symbol
+    end
+    def test_ins_index
+      assert_equal 0 , @instruction.index
+    end
+    def test_ins_next_reg
+      assert_equal :r1 , @instruction.next.register.symbol
+    end
+    def test_ins_next_arr
+      assert_equal :r0 , @instruction.next.array.symbol
+    end
+    def test_ins_next_index
+      assert_equal 6 , @instruction.next.index
     end
   end
 end