Skip undefined warnings during bootstrap

Author: josevalim

lib/ex_unit/lib/ex_unit/case.ex

@@ -276,7 +276,7 @@ defmodule ExUnit.Case do
   """
 
   @type env :: module() | Macro.Env.t()
-
+  @compile {:no_warn_undefined, [IEx.Pry]}
   @reserved [:module, :file, :line, :test, :async, :registered, :describe]
 
   @doc false

lib/mix/lib/mix/tasks/test.ex

@@ -3,7 +3,7 @@ defmodule Mix.Tasks.Test do
 
   alias Mix.Compilers.Test, as: CT
 
-  @compile {:no_warn_undefined, [ExUnit, ExUnit.Filters]}
+  @compile {:no_warn_undefined, [IEx, ExUnit, ExUnit.Filters]}
   @shortdoc "Runs a project's tests"
   @recursive true