https://git.ruby-lang.org/ruby.git/commit/?id=20971d0df4

From 20971d0df41368e0f946683823bc786514e16fef Mon Sep 17 00:00:00 2001
From: Hiroshi SHIBATA <hsbt@r...>
Date: Fri, 8 May 2020 12:39:07 +0900
Subject: Revert "[rubygems/rubygems] Use a local temporary directory"

This reverts commit e98455f289047c43a733e61ac6317fb74b68de82.

diff --git a/lib/rubygems/test_case.rb b/lib/rubygems/test_case.rb
index e2a880e..cd74ec6 100644
--- a/lib/rubygems/test_case.rb
+++ b/lib/rubygems/test_case.rb
@@ -302,7 +302,6 @@ class Gem::TestCase < Minitest::Test https://github.com/ruby/ruby/blob/trunk/lib/rubygems/test_case.rb#L302
     ENV['GEM_VENDOR'] = nil
     ENV['GEMRC'] = nil
     ENV['SOURCE_DATE_EPOCH'] = nil
-    ENV["TMPDIR"] = File.expand_path("tmp")
 
     @current_dir = Dir.pwd
     @fetcher     = nil
-- 
cgit v0.10.2


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