diff --git a/core/string/fixtures/utf-8-encoding.rb b/core/string/fixtures/utf-8-encoding.rb
deleted file mode 100644
index fd243ec522..0000000000
--- a/core/string/fixtures/utf-8-encoding.rb
+++ /dev/null
@@ -1,7 +0,0 @@
-# -*- encoding: utf-8 -*-
-module StringSpecs
-  class UTF8Encoding
-    def self.source_encoding; __ENCODING__; end
-    def self.egrave; "é"; end
-  end
-end
diff --git a/core/string/rindex_spec.rb b/core/string/rindex_spec.rb
index 45ff13a006..f6271b270d 100644
--- a/core/string/rindex_spec.rb
+++ b/core/string/rindex_spec.rb
@@ -1,7 +1,6 @@
 # -*- encoding: utf-8 -*-
 require_relative '../../spec_helper'
 require_relative 'fixtures/classes'
-require_relative 'fixtures/utf-8-encoding'
 
 describe "String#rindex with object" do
   it "raises a TypeError if obj isn't a String or Regexp" do