diff --git a/Library/Homebrew/test/support/helper/test_case.rb b/Library/Homebrew/test/support/helper/test_case.rb
index c4c7f87275..801fa08c77 100644
--- a/Library/Homebrew/test/support/helper/test_case.rb
+++ b/Library/Homebrew/test/support/helper/test_case.rb
@@ -18,7 +18,7 @@ module Homebrew
       super
 
       @__argv = ARGV.dup
-      @__env = copy_env # Call #to_hash to duplicate ENV
+      @__env = copy_env
     end
 
     def teardown