1 files changed, 15 insertions, 3 deletions
diff --git a/test/ruby/test_pipe.rb b/test/ruby/test_pipe.rb
index c3b4d29c0a..efca8f28c1 100644
--- a/test/ruby/test_pipe.rb
+++ b/test/ruby/test_pipe.rb
@@ -1,7 +1,6 @@
+# frozen_string_literal: false
 require 'test/unit'
-$:.replace([File.dirname(File.expand_path(__FILE__))] | $:)
-require 'ut_eof'
-require 'envutil'
+require_relative 'ut_eof'
 
 class TestPipe < Test::Unit::TestCase
   include TestEOF
@@ -15,4 +14,17 @@ class TestPipe < Test::Unit::TestCase
       r.close
     end
   end
+  class WithConversion < self
+    def open_file(content)
+      r, w = IO.pipe
+      w << content
+      w.close
+      r.set_encoding("us-ascii:utf-8")
+      begin
+        yield r
+      ensure
+        r.close
+      end
+    end
+  end
 end