From fd6d5c803a78e389a643c65ae8ac3761817c4341 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Sun, 24 Jan 2021 23:33:52 +0900
Subject: [PATCH] Clear each test own temporary directories

---
 lib/rubygems/test_case.rb | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/lib/rubygems/test_case.rb b/lib/rubygems/test_case.rb
index 83a3c446a7..79bd3e2a60 100644
--- a/lib/rubygems/test_case.rb
+++ b/lib/rubygems/test_case.rb
@@ -301,9 +301,7 @@ class Gem::TestCase < Minitest::Test
 
   def setup
     @orig_env = ENV.to_hash
-    @tmp = File.expand_path("tmp")
-
-    FileUtils.mkdir_p @tmp
+    @tmp = Dir.mktmpdir("tmp", Dir.pwd)
 
     ENV['GEM_VENDOR'] = nil
     ENV['GEMRC'] = nil
@@ -451,6 +449,7 @@ class Gem::TestCase < Minitest::Test
     Dir.chdir @current_dir
 
     FileUtils.rm_rf @tempdir
+    FileUtils.rm_rf @tmp
 
     ENV.replace(@orig_env)