1 files changed, 4 insertions, 19 deletions
diff --git a/spec/ruby/core/string/uminus_spec.rb b/spec/ruby/core/string/uminus_spec.rb
index 53e73b7e67..46d88f6704 100644
--- a/spec/ruby/core/string/uminus_spec.rb
+++ b/spec/ruby/core/string/uminus_spec.rb
@@ -1,21 +1,6 @@
-require File.expand_path('../../../spec_helper', __FILE__)
+require_relative '../../spec_helper'
+require_relative 'shared/dedup'
 
-ruby_version_is "2.3" do
-  describe 'String#-@' do
-    it 'returns self if the String is frozen' do
-      input  = 'foo'.freeze
-      output = -input
-
-      output.equal?(input).should == true
-      output.frozen?.should == true
-    end
-
-    it 'returns a frozen copy if the String is not frozen' do
-      input  = 'foo'
-      output = -input
-
-      output.frozen?.should == true
-      output.should == 'foo'
-    end
-  end
+describe 'String#-@' do
+  it_behaves_like :string_dedup, :-@
 end