1 files changed, 9 insertions, 4 deletions
diff --git a/spec/ruby/library/tempfile/initialize_spec.rb b/spec/ruby/library/tempfile/initialize_spec.rb
index 79f33e3e98..0e882a3f0c 100644
--- a/spec/ruby/library/tempfile/initialize_spec.rb
+++ b/spec/ruby/library/tempfile/initialize_spec.rb
@@ -1,4 +1,4 @@
-require File.expand_path('../../../spec_helper', __FILE__)
+require_relative '../../spec_helper'
 require 'tempfile'
 
 describe "Tempfile#initialize" do
@@ -12,7 +12,7 @@ describe "Tempfile#initialize" do
 
   it "opens a new tempfile with the passed name in the passed directory" do
     @tempfile.send(:initialize, "basename", tmp(""))
-    File.exist?(@tempfile.path).should be_true
+    File.should.exist?(@tempfile.path)
 
     tmpdir = tmp("")
     path = @tempfile.path
@@ -24,11 +24,11 @@ describe "Tempfile#initialize" do
     end
 
     path[0, tmpdir.length].should == tmpdir
-    path.should include("basename")
+    path.should.include?("basename")
   end
 
   platform_is_not :windows do
-    it "sets the permisssions on the tempfile to 0600" do
+    it "sets the permissions on the tempfile to 0600" do
       @tempfile.send(:initialize, "basename", tmp(""))
       File.stat(@tempfile.path).mode.should == 0100600
     end
@@ -38,4 +38,9 @@ describe "Tempfile#initialize" do
     @tempfile.send(:initialize, ['shiftjis', 'yml'], encoding: 'SHIFT_JIS')
     @tempfile.external_encoding.should == Encoding::Shift_JIS
   end
+
+  it "does not try to modify the arguments" do
+    @tempfile.send(:initialize, ['frozen'.freeze, 'txt'.freeze], encoding: Encoding::IBM437)
+    @tempfile.external_encoding.should == Encoding::IBM437
+  end
 end