diff --git a/test/register/interpreter/test_all.rb b/test/register/interpreter/test_all.rb
index 332f49ce..761b562d 100644
--- a/test/register/interpreter/test_all.rb
+++ b/test/register/interpreter/test_all.rb
@@ -1,4 +1,5 @@
 require_relative "test_add"
+require_relative "test_change"
 require_relative "test_if"
 require_relative "test_puts"
 require_relative "test_plus"
diff --git a/test/register/interpreter/test_change.rb b/test/register/interpreter/test_change.rb
new file mode 100644
index 00000000..6856d28a
--- /dev/null
+++ b/test/register/interpreter/test_change.rb
@@ -0,0 +1,45 @@
+require_relative "helper"
+
+class AddChange < MiniTest::Test
+  include Ticker
+
+  def setup
+    @input = s(:statements, s(:class, :Space, s(:derives, nil), s(:statements, s(:function, :Integer, s(:name, :main), s(:parameters), s(:statements, s(:return, s(:operator_value, :+, s(:int, 5), s(:int, 7))))))))
+    @state_events = {}
+    @instruction_events = []
+    super
+  end
+
+  def state_changed( a , b)
+    @state_events[:state_changed] = [a , b]
+  end
+
+  def instruction_changed(was , is )
+    @instruction_events << was
+  end
+
+  def test_state_change
+    @interpreter.register_event :state_changed , self
+    ticks 30
+    assert @state_events[:state_changed]
+    assert_equal 2 ,  @state_events[:state_changed].length
+    assert_equal :running,  @state_events[:state_changed][0]
+    @interpreter.unregister_event :state_changed , self
+  end
+
+  def test_instruction_events
+    @interpreter.register_event :instruction_changed , self
+    ticks 30
+    assert_equal 17 ,  @instruction_events.length
+    @interpreter.unregister_event :instruction_changed , self
+  end
+
+  def test_chain
+    #show_ticks # get output of what is
+    check_chain ["Branch","Label","LoadConstant","GetSlot","SetSlot",
+     "LoadConstant","SetSlot","FunctionCall","Label","LoadConstant",
+     "LoadConstant","OperatorInstruction","SetSlot","Label","FunctionReturn",
+     "RegisterTransfer","Syscall","NilClass"]
+  end
+
+end
diff --git a/test/test_all.rb b/test/test_all.rb
index 7cb5a78b..04562ca8 100644
--- a/test/test_all.rb
+++ b/test/test_all.rb
@@ -2,6 +2,8 @@ require_relative "elf/test_all"
 
 require_relative "lib/test_all"
 
+require_relative "melon/test_all"
+
 require_relative "register/test_all"
 
 require_relative "typed/test_all"