Do not change value of infer signatures during tests

Author: josevalim

lib/elixir/test/elixir/module/types/integration_test.exs

@@ -37,13 +37,10 @@ defmodule Module.Types.IntegrationTest do
   end
 
   setup_all do
-    previous = Application.get_env(:elixir, :ansi_enabled, false)
     Application.put_env(:elixir, :ansi_enabled, false)
-    Code.put_compiler_option(:infer_signatures, [:elixir])
 
     on_exit(fn ->
-      Application.put_env(:elixir, :ansi_enabled, previous)
-      Code.put_compiler_option(:infer_signatures, false)
+      Application.put_env(:elixir, :ansi_enabled, true)
     end)
   end
 

lib/elixir/test/elixir/test_helper.exs

@@ -9,7 +9,7 @@ File.mkdir_p!(path)
 Code.prepend_path(path)
 
 Application.put_env(:elixir, :ansi_enabled, true)
-Code.compiler_options(debug_info: true)
+Code.compiler_options(debug_info: true, infer_signatures: [:elixir])
 
 defmodule PathHelpers do
   def fixture_path() do