Try fix CI

bundler/spec/realworld/edgecases_spec.rb

@@ -4,9 +4,9 @@
   def rubygems_version(name, requirement)
     ruby <<-RUBY
       require "#{spec_dir}/support/artifice/vcr"
-      require "#{entrypoint}"
-      require "#{entrypoint}/source/rubygems/remote"
-      require "#{entrypoint}/fetcher"
+      require "bundler"
+      require "bundler/source/rubygems/remote"
+      require "bundler/fetcher"
       rubygem = Bundler.ui.silence do
         source = Bundler::Source::Rubygems::Remote.new(Bundler::URI("https://rubygems.org"))
         fetcher = Bundler::Fetcher.new(source)
@@ -64,7 +64,7 @@ def rubygems_version(name, requirement)
   it "is able to update a top-level dependency when there is a conflict on a shared transitive child" do
     # from https://github.com/rubygems/bundler/issues/5031
 
-    system_gems "bundler-1.99.0"
+    pristine_system_gems "bundler-1.99.0"
 
     gemfile <<-G
       source "https://rubygems.org"