1 files changed, 4 insertions, 5 deletions
diff --git a/spec/ruby/core/string/codepoints_spec.rb b/spec/ruby/core/string/codepoints_spec.rb
index 0b6cde82f7..4434eb66a5 100644
--- a/spec/ruby/core/string/codepoints_spec.rb
+++ b/spec/ruby/core/string/codepoints_spec.rb
@@ -1,7 +1,6 @@
-# -*- encoding: binary -*-
+# encoding: binary
 require_relative '../../spec_helper'
 require_relative 'shared/codepoints'
-require_relative 'shared/each_codepoint_without_block'
 
 describe "String#codepoints" do
   it_behaves_like :string_codepoints, :codepoints
@@ -11,8 +10,8 @@ describe "String#codepoints" do
   end
 
   it "raises an ArgumentError when no block is given if self has an invalid encoding" do
-    s = "\xDF".force_encoding(Encoding::UTF_8)
-    s.valid_encoding?.should be_false
-    -> { s.codepoints }.should raise_error(ArgumentError)
+    s = "\xDF".dup.force_encoding(Encoding::UTF_8)
+    s.valid_encoding?.should == false
+    -> { s.codepoints }.should.raise(ArgumentError)
   end
 end