Skip modules that require source

Author: josevalim

lib/mix/test/mix/tasks/source_test.exs

@@ -8,6 +8,7 @@ defmodule Mix.Tasks.SourceTest do
 
   import ExUnit.CaptureIO
 
+  @moduletag :requires_source
   @editor System.get_env("ELIXIR_EDITOR")
 
   test "source MODULE", context do

lib/mix/test/test_helper.exs

@@ -38,7 +38,7 @@ git_exclude =
 
 cover_exclude =
   if :deterministic in :compile.env_compiler_options() do
-    [:cover]
+    [:cover, :requires_source]
   else
     []
   end