diff --git a/ext/psych/extconf.rb b/ext/psych/extconf.rb
index be33d35a5e..6d8390ebe5 100644
--- a/ext/psych/extconf.rb
+++ b/ext/psych/extconf.rb
@@ -1,5 +1,5 @@
 # -*- coding: us-ascii -*-
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'mkmf'
 require 'fileutils'
 
diff --git a/ext/psych/lib/psych.rb b/ext/psych/lib/psych.rb
index 9959320a7f..e93ac8f406 100644
--- a/ext/psych/lib/psych.rb
+++ b/ext/psych/lib/psych.rb
@@ -1,11 +1,15 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/versions'
 case RUBY_ENGINE
 when 'jruby'
   require 'psych_jars'
   org.jruby.ext.psych.PsychLibrary.new.load(JRuby.runtime, false)
 else
-  require 'psych.so'
+  begin
+    require "#{RUBY_VERSION[/\d+\.\d+/]}/psych.so"
+  rescue LoadError
+    require 'psych.so'
+  end
 end
 require 'psych/nodes'
 require 'psych/streaming'
diff --git a/ext/psych/lib/psych/class_loader.rb b/ext/psych/lib/psych/class_loader.rb
index ba756f7ea7..cfca86845a 100644
--- a/ext/psych/lib/psych/class_loader.rb
+++ b/ext/psych/lib/psych/class_loader.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/omap'
 require 'psych/set'
 
diff --git a/ext/psych/lib/psych/coder.rb b/ext/psych/lib/psych/coder.rb
index 26005f57b4..96a9c3fbad 100644
--- a/ext/psych/lib/psych/coder.rb
+++ b/ext/psych/lib/psych/coder.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Psych
   ###
   # If an object defines +encode_with+, then an instance of Psych::Coder will
diff --git a/ext/psych/lib/psych/core_ext.rb b/ext/psych/lib/psych/core_ext.rb
index 1232abf3d9..81055cc501 100644
--- a/ext/psych/lib/psych/core_ext.rb
+++ b/ext/psych/lib/psych/core_ext.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 class Object
   def self.yaml_tag url
     Psych.add_tag(url, self)
diff --git a/ext/psych/lib/psych/exception.rb b/ext/psych/lib/psych/exception.rb
index 83c3d7fa82..fac0c42b9f 100644
--- a/ext/psych/lib/psych/exception.rb
+++ b/ext/psych/lib/psych/exception.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Psych
   class Exception < RuntimeError
   end
diff --git a/ext/psych/lib/psych/handler.rb b/ext/psych/lib/psych/handler.rb
index 1ab5f73e95..1074c18f9e 100644
--- a/ext/psych/lib/psych/handler.rb
+++ b/ext/psych/lib/psych/handler.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Psych
   ###
   # Psych::Handler is an abstract base class that defines the events used
diff --git a/ext/psych/lib/psych/handlers/document_stream.rb b/ext/psych/lib/psych/handlers/document_stream.rb
index c43b39ebc5..67da794093 100644
--- a/ext/psych/lib/psych/handlers/document_stream.rb
+++ b/ext/psych/lib/psych/handlers/document_stream.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/tree_builder'
 
 module Psych
diff --git a/ext/psych/lib/psych/handlers/recorder.rb b/ext/psych/lib/psych/handlers/recorder.rb
index 341b81dec4..a8fc7b1144 100644
--- a/ext/psych/lib/psych/handlers/recorder.rb
+++ b/ext/psych/lib/psych/handlers/recorder.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/handler'
 
 module Psych
diff --git a/ext/psych/lib/psych/json/ruby_events.rb b/ext/psych/lib/psych/json/ruby_events.rb
index 478eb667c7..17b7ddc386 100644
--- a/ext/psych/lib/psych/json/ruby_events.rb
+++ b/ext/psych/lib/psych/json/ruby_events.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Psych
   module JSON
     module RubyEvents # :nodoc:
diff --git a/ext/psych/lib/psych/json/stream.rb b/ext/psych/lib/psych/json/stream.rb
index 83b7e13655..2ebd3d7a66 100644
--- a/ext/psych/lib/psych/json/stream.rb
+++ b/ext/psych/lib/psych/json/stream.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/json/ruby_events'
 require 'psych/json/yaml_events'
 
diff --git a/ext/psych/lib/psych/json/tree_builder.rb b/ext/psych/lib/psych/json/tree_builder.rb
index 2f94b8c252..5c2ee8ca25 100644
--- a/ext/psych/lib/psych/json/tree_builder.rb
+++ b/ext/psych/lib/psych/json/tree_builder.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/json/yaml_events'
 
 module Psych
diff --git a/ext/psych/lib/psych/json/yaml_events.rb b/ext/psych/lib/psych/json/yaml_events.rb
index 07f64737c5..eb973f5361 100644
--- a/ext/psych/lib/psych/json/yaml_events.rb
+++ b/ext/psych/lib/psych/json/yaml_events.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Psych
   module JSON
     module YAMLEvents # :nodoc:
diff --git a/ext/psych/lib/psych/nodes.rb b/ext/psych/lib/psych/nodes.rb
index 01573b509b..5842c2e3e5 100644
--- a/ext/psych/lib/psych/nodes.rb
+++ b/ext/psych/lib/psych/nodes.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/nodes/node'
 require 'psych/nodes/stream'
 require 'psych/nodes/document'
diff --git a/ext/psych/lib/psych/nodes/alias.rb b/ext/psych/lib/psych/nodes/alias.rb
index 716a00d62f..8131a4befb 100644
--- a/ext/psych/lib/psych/nodes/alias.rb
+++ b/ext/psych/lib/psych/nodes/alias.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Psych
   module Nodes
     ###
diff --git a/ext/psych/lib/psych/nodes/document.rb b/ext/psych/lib/psych/nodes/document.rb
index 7234fef1d8..3cd418eaf3 100644
--- a/ext/psych/lib/psych/nodes/document.rb
+++ b/ext/psych/lib/psych/nodes/document.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Psych
   module Nodes
     ###
diff --git a/ext/psych/lib/psych/nodes/mapping.rb b/ext/psych/lib/psych/nodes/mapping.rb
index 4c11df8cd6..b921ddc862 100644
--- a/ext/psych/lib/psych/nodes/mapping.rb
+++ b/ext/psych/lib/psych/nodes/mapping.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Psych
   module Nodes
     ###
diff --git a/ext/psych/lib/psych/nodes/node.rb b/ext/psych/lib/psych/nodes/node.rb
index e3621dc451..1c7672164d 100644
--- a/ext/psych/lib/psych/nodes/node.rb
+++ b/ext/psych/lib/psych/nodes/node.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'stringio'
 require 'psych/class_loader'
 require 'psych/scalar_scanner'
diff --git a/ext/psych/lib/psych/nodes/scalar.rb b/ext/psych/lib/psych/nodes/scalar.rb
index ee5570518e..b448858831 100644
--- a/ext/psych/lib/psych/nodes/scalar.rb
+++ b/ext/psych/lib/psych/nodes/scalar.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Psych
   module Nodes
     ###
diff --git a/ext/psych/lib/psych/nodes/sequence.rb b/ext/psych/lib/psych/nodes/sequence.rb
index 1096469567..77c2c602b9 100644
--- a/ext/psych/lib/psych/nodes/sequence.rb
+++ b/ext/psych/lib/psych/nodes/sequence.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Psych
   module Nodes
     ###
diff --git a/ext/psych/lib/psych/nodes/stream.rb b/ext/psych/lib/psych/nodes/stream.rb
index 559b0846e7..2474fe62c4 100644
--- a/ext/psych/lib/psych/nodes/stream.rb
+++ b/ext/psych/lib/psych/nodes/stream.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Psych
   module Nodes
     ###
diff --git a/ext/psych/lib/psych/omap.rb b/ext/psych/lib/psych/omap.rb
index 233b945c4a..29cde0be50 100644
--- a/ext/psych/lib/psych/omap.rb
+++ b/ext/psych/lib/psych/omap.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Psych
   class Omap < ::Hash
   end
diff --git a/ext/psych/lib/psych/parser.rb b/ext/psych/lib/psych/parser.rb
index 242512f89f..39bc8289be 100644
--- a/ext/psych/lib/psych/parser.rb
+++ b/ext/psych/lib/psych/parser.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Psych
   ###
   # YAML event parser class.  This class parses a YAML document and calls
diff --git a/ext/psych/lib/psych/scalar_scanner.rb b/ext/psych/lib/psych/scalar_scanner.rb
index 67c0cc3d4e..29c156c212 100644
--- a/ext/psych/lib/psych/scalar_scanner.rb
+++ b/ext/psych/lib/psych/scalar_scanner.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'strscan'
 
 module Psych
diff --git a/ext/psych/lib/psych/set.rb b/ext/psych/lib/psych/set.rb
index f35be15e6f..760d217098 100644
--- a/ext/psych/lib/psych/set.rb
+++ b/ext/psych/lib/psych/set.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Psych
   class Set < ::Hash
   end
diff --git a/ext/psych/lib/psych/stream.rb b/ext/psych/lib/psych/stream.rb
index 2f63d7d552..24e45afc3b 100644
--- a/ext/psych/lib/psych/stream.rb
+++ b/ext/psych/lib/psych/stream.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Psych
   ###
   # Psych::Stream is a streaming YAML emitter.  It will not buffer your YAML,
diff --git a/ext/psych/lib/psych/streaming.rb b/ext/psych/lib/psych/streaming.rb
index 260f8a8008..eb19792ad0 100644
--- a/ext/psych/lib/psych/streaming.rb
+++ b/ext/psych/lib/psych/streaming.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Psych
   module Streaming
     module ClassMethods
diff --git a/ext/psych/lib/psych/syntax_error.rb b/ext/psych/lib/psych/syntax_error.rb
index db293b9fb2..1598e6ff36 100644
--- a/ext/psych/lib/psych/syntax_error.rb
+++ b/ext/psych/lib/psych/syntax_error.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/exception'
 
 module Psych
diff --git a/ext/psych/lib/psych/tree_builder.rb b/ext/psych/lib/psych/tree_builder.rb
index d359c933af..b10fd5c5cd 100644
--- a/ext/psych/lib/psych/tree_builder.rb
+++ b/ext/psych/lib/psych/tree_builder.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/handler'
 
 module Psych
diff --git a/ext/psych/lib/psych/versions.rb b/ext/psych/lib/psych/versions.rb
index 3d61c8b015..49f8820246 100644
--- a/ext/psych/lib/psych/versions.rb
+++ b/ext/psych/lib/psych/versions.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Psych
   # The version is Psych you're using
   VERSION = '3.0.0.beta2'
diff --git a/ext/psych/lib/psych/visitors.rb b/ext/psych/lib/psych/visitors.rb
index 5dee4ebd7a..e2b084daee 100644
--- a/ext/psych/lib/psych/visitors.rb
+++ b/ext/psych/lib/psych/visitors.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/visitors/visitor'
 require 'psych/visitors/to_ruby'
 require 'psych/visitors/emitter'
diff --git a/ext/psych/lib/psych/visitors/depth_first.rb b/ext/psych/lib/psych/visitors/depth_first.rb
index 2d74a212d6..b4ff9e40e7 100644
--- a/ext/psych/lib/psych/visitors/depth_first.rb
+++ b/ext/psych/lib/psych/visitors/depth_first.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Psych
   module Visitors
     class DepthFirst < Psych::Visitors::Visitor
diff --git a/ext/psych/lib/psych/visitors/emitter.rb b/ext/psych/lib/psych/visitors/emitter.rb
index f2ff9fdb28..e3b92b7d03 100644
--- a/ext/psych/lib/psych/visitors/emitter.rb
+++ b/ext/psych/lib/psych/visitors/emitter.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Psych
   module Visitors
     class Emitter < Psych::Visitors::Visitor
diff --git a/ext/psych/lib/psych/visitors/json_tree.rb b/ext/psych/lib/psych/visitors/json_tree.rb
index f2f0215cd2..9912cb1362 100644
--- a/ext/psych/lib/psych/visitors/json_tree.rb
+++ b/ext/psych/lib/psych/visitors/json_tree.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/json/ruby_events'
 
 module Psych
diff --git a/ext/psych/lib/psych/visitors/to_ruby.rb b/ext/psych/lib/psych/visitors/to_ruby.rb
index d1318b3ca0..74a52df866 100644
--- a/ext/psych/lib/psych/visitors/to_ruby.rb
+++ b/ext/psych/lib/psych/visitors/to_ruby.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/scalar_scanner'
 require 'psych/class_loader'
 require 'psych/exception'
diff --git a/ext/psych/lib/psych/visitors/visitor.rb b/ext/psych/lib/psych/visitors/visitor.rb
index d97bf550f6..3f4ba64e57 100644
--- a/ext/psych/lib/psych/visitors/visitor.rb
+++ b/ext/psych/lib/psych/visitors/visitor.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Psych
   module Visitors
     class Visitor
diff --git a/ext/psych/lib/psych/visitors/yaml_tree.rb b/ext/psych/lib/psych/visitors/yaml_tree.rb
index e197a30611..cfed8f1814 100644
--- a/ext/psych/lib/psych/visitors/yaml_tree.rb
+++ b/ext/psych/lib/psych/visitors/yaml_tree.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/tree_builder'
 require 'psych/scalar_scanner'
 require 'psych/class_loader'
@@ -321,7 +321,7 @@ module Psych
           end
           @emitter.scalar o, nil, tag, plain, quote, style
         else
-          maptag = '!ruby/string'
+          maptag = '!ruby/string'.dup
           maptag << ":#{o.class}" unless o.class == ::String
 
           register o, @emitter.start_mapping(nil, maptag, false, Nodes::Mapping::BLOCK)
@@ -378,14 +378,18 @@ module Psych
 
       def visit_Array o
         if o.class == ::Array
-          register o, @emitter.start_sequence(nil, nil, true, Nodes::Sequence::BLOCK)
-          o.each { |c| accept c }
-          @emitter.end_sequence
+          visit_Enumerator o
         else
           visit_array_subclass o
         end
       end
 
+      def visit_Enumerator o
+        register o, @emitter.start_sequence(nil, nil, true, Nodes::Sequence::BLOCK)
+        o.each { |c| accept c }
+        @emitter.end_sequence
+      end
+
       def visit_NilClass o
         @emitter.scalar('', nil, 'tag:yaml.org,2002:null', true, false, Nodes::Scalar::ANY)
       end
@@ -411,15 +415,9 @@ module Psych
       end
 
       private
-      # FIXME: Remove the index and count checks in Psych 3.0
-      NULL         = "\x00"
-      BINARY_RANGE = "\x00-\x7F"
-      WS_RANGE     = "^ -~\t\r\n"
 
       def binary? string
-        (string.encoding == Encoding::ASCII_8BIT && !string.ascii_only?) ||
-          string.index(NULL) ||
-          string.count(BINARY_RANGE, WS_RANGE).fdiv(string.length) > 0.3
+        string.encoding == Encoding::ASCII_8BIT && !string.ascii_only?
       end
 
       def visit_array_subclass o
diff --git a/ext/psych/lib/psych/y.rb b/ext/psych/lib/psych/y.rb
index 82e05a783c..e857953c04 100644
--- a/ext/psych/lib/psych/y.rb
+++ b/ext/psych/lib/psych/y.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 module Kernel
   ###
   # An alias for Psych.dump_stream meant to be used with IRB.
diff --git a/ext/psych/psych.gemspec b/ext/psych/psych.gemspec
index c0ec5c5334..06073735dd 100644
--- a/ext/psych/psych.gemspec
+++ b/ext/psych/psych.gemspec
@@ -1,4 +1,5 @@
 # -*- encoding: utf-8 -*-
+# frozen_string_literal: true
 
 Gem::Specification.new do |s|
   s.name = "psych"
@@ -17,7 +18,25 @@ DESCRIPTION
   s.require_paths = ["lib"]
 
   # for ruby core repository. It was generated by `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
-  s.files = [".gitignore", ".travis.yml", "CHANGELOG.rdoc", "Gemfile", "Mavenfile", "README.md", "Rakefile", "bin/console", "bin/setup", "ext/psych/.gitignore", "ext/psych/depend", "ext/psych/extconf.rb", "ext/psych/psych.c", "ext/psych/psych.h", "ext/psych/psych_emitter.c", "ext/psych/psych_emitter.h", "ext/psych/psych_parser.c", "ext/psych/psych_parser.h", "ext/psych/psych_to_ruby.c", "ext/psych/psych_to_ruby.h", "ext/psych/psych_yaml_tree.c", "ext/psych/psych_yaml_tree.h", "ext/psych/yaml/LICENSE", "ext/psych/yaml/api.c", "ext/psych/yaml/config.h", "ext/psych/yaml/dumper.c", "ext/psych/yaml/emitter.c", "ext/psych/yaml/loader.c", "ext/psych/yaml/parser.c", "ext/psych/yaml/reader.c", "ext/psych/yaml/scanner.c", "ext/psych/yaml/writer.c", "ext/psych/yaml/yaml.h", "ext/psych/yaml/yaml_private.h", "lib/psych.rb", "lib/psych/class_loader.rb", "lib/psych/coder.rb", "lib/psych/core_ext.rb", "lib/psych/exception.rb", "lib/psych/handler.rb", "lib/psych/handlers/document_stream.rb", "lib/psych/handlers/recorder.rb", "lib/psych/json/ruby_events.rb", "lib/psych/json/stream.rb", "lib/psych/json/tree_builder.rb", "lib/psych/json/yaml_events.rb", "lib/psych/nodes.rb", "lib/psych/nodes/alias.rb", "lib/psych/nodes/document.rb", "lib/psych/nodes/mapping.rb", "lib/psych/nodes/node.rb", "lib/psych/nodes/scalar.rb", "lib/psych/nodes/sequence.rb", "lib/psych/nodes/stream.rb", "lib/psych/omap.rb", "lib/psych/parser.rb", "lib/psych/scalar_scanner.rb", "lib/psych/set.rb", "lib/psych/stream.rb", "lib/psych/streaming.rb", "lib/psych/syntax_error.rb", "lib/psych/tree_builder.rb", "lib/psych/versions.rb", "lib/psych/visitors.rb","lib/psych/visitors/depth_first.rb", "lib/psych/visitors/emitter.rb", "lib/psych/visitors/json_tree.rb", "lib/psych/visitors/to_ruby.rb", "lib/psych/visitors/visitor.rb", "lib/psych/visitors/yaml_tree.rb", "lib/psych/y.rb", "psych.gemspec"]
+  s.files = [
+    ".gitignore", ".travis.yml", "CHANGELOG.rdoc", "Gemfile", "Mavenfile", "README.md", "Rakefile", "bin/console",
+    "bin/setup", "ext/psych/.gitignore", "ext/psych/depend", "ext/psych/extconf.rb", "ext/psych/psych.c", "ext/psych/psych.h",
+    "ext/psych/psych_emitter.c", "ext/psych/psych_emitter.h", "ext/psych/psych_parser.c", "ext/psych/psych_parser.h",
+    "ext/psych/psych_to_ruby.c", "ext/psych/psych_to_ruby.h", "ext/psych/psych_yaml_tree.c", "ext/psych/psych_yaml_tree.h",
+    "ext/psych/yaml/LICENSE", "ext/psych/yaml/api.c", "ext/psych/yaml/config.h", "ext/psych/yaml/dumper.c",
+    "ext/psych/yaml/emitter.c", "ext/psych/yaml/loader.c", "ext/psych/yaml/parser.c", "ext/psych/yaml/reader.c",
+    "ext/psych/yaml/scanner.c", "ext/psych/yaml/writer.c", "ext/psych/yaml/yaml.h", "ext/psych/yaml/yaml_private.h",
+    "lib/psych.rb", "lib/psych/class_loader.rb", "lib/psych/coder.rb", "lib/psych/core_ext.rb", "lib/psych/exception.rb",
+    "lib/psych/handler.rb", "lib/psych/handlers/document_stream.rb", "lib/psych/handlers/recorder.rb",
+    "lib/psych/json/ruby_events.rb", "lib/psych/json/stream.rb", "lib/psych/json/tree_builder.rb",
+    "lib/psych/json/yaml_events.rb", "lib/psych/nodes.rb", "lib/psych/nodes/alias.rb", "lib/psych/nodes/document.rb",
+    "lib/psych/nodes/mapping.rb", "lib/psych/nodes/node.rb", "lib/psych/nodes/scalar.rb", "lib/psych/nodes/sequence.rb",
+    "lib/psych/nodes/stream.rb", "lib/psych/omap.rb", "lib/psych/parser.rb", "lib/psych/scalar_scanner.rb",
+    "lib/psych/set.rb", "lib/psych/stream.rb", "lib/psych/streaming.rb", "lib/psych/syntax_error.rb",
+    "lib/psych/tree_builder.rb", "lib/psych/versions.rb", "lib/psych/visitors.rb","lib/psych/visitors/depth_first.rb",
+    "lib/psych/visitors/emitter.rb", "lib/psych/visitors/json_tree.rb", "lib/psych/visitors/to_ruby.rb",
+    "lib/psych/visitors/visitor.rb", "lib/psych/visitors/yaml_tree.rb", "lib/psych/y.rb", "psych.gemspec"
+  ]
 
   s.rdoc_options = ["--main", "README.md"]
   s.extra_rdoc_files = ["CHANGELOG.rdoc", "README.md"]
@@ -31,11 +50,15 @@ DESCRIPTION
 
   if RUBY_ENGINE == 'jruby'
     s.platform = 'java'
-    s.files.concat ["ext/java/PsychEmitter.java", "ext/java/PsychLibrary.java", "ext/java/PsychParser.java", "ext/java/PsychToRuby.java", "ext/java/PsychYamlTree.java", "lib/psych_jars.rb", "lib/psych.jar"]
+    s.files.concat [
+      "ext/java/PsychEmitter.java", "ext/java/PsychLibrary.java", "ext/java/PsychParser.java", "ext/java/PsychToRuby.java",
+      "ext/java/PsychYamlTree.java", "lib/psych_jars.rb", "lib/psych.jar"
+    ]
     s.requirements = "jar org.yaml:snakeyaml, 1.18"
     s.add_dependency 'jar-dependencies', '>= 0.1.7'
     s.add_development_dependency 'ruby-maven'
   else
     s.extensions = ["ext/psych/extconf.rb"]
+    s.add_development_dependency 'rake-compiler-dock', ">= 0.6.1"
   end
 end
diff --git a/test/psych/handlers/test_recorder.rb b/test/psych/handlers/test_recorder.rb
index 17c7c6d0a0..d9d379ea9a 100644
--- a/test/psych/handlers/test_recorder.rb
+++ b/test/psych/handlers/test_recorder.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/helper'
 require 'psych/handlers/recorder'
 
diff --git a/test/psych/helper.rb b/test/psych/helper.rb
index 7b564bd2d7..9348457958 100644
--- a/test/psych/helper.rb
+++ b/test/psych/helper.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'minitest/autorun'
 require 'stringio'
 require 'tempfile'
diff --git a/test/psych/json/test_stream.rb b/test/psych/json/test_stream.rb
index 519c114b29..90a770c1b7 100644
--- a/test/psych/json/test_stream.rb
+++ b/test/psych/json/test_stream.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/helper'
 
 module Psych
diff --git a/test/psych/nodes/test_enumerable.rb b/test/psych/nodes/test_enumerable.rb
index 2f4e1f3bd0..76b36856f1 100644
--- a/test/psych/nodes/test_enumerable.rb
+++ b/test/psych/nodes/test_enumerable.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/helper'
 
 module Psych
diff --git a/test/psych/test_alias_and_anchor.rb b/test/psych/test_alias_and_anchor.rb
index ed009605ca..91c09dfdfa 100644
--- a/test/psych/test_alias_and_anchor.rb
+++ b/test/psych/test_alias_and_anchor.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 class ObjectWithInstanceVariables
diff --git a/test/psych/test_array.rb b/test/psych/test_array.rb
index 6306a049fc..f2bbdcab88 100644
--- a/test/psych/test_array.rb
+++ b/test/psych/test_array.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
@@ -15,6 +15,12 @@ module Psych
       @list = [{ :a => 'b' }, 'foo']
     end
 
+    def test_enumerator
+      x = [1, 2, 3, 4]
+      y = Psych.load Psych.dump x.to_enum
+      assert_equal x, y
+    end
+
     def test_another_subclass_with_attributes
       y = Y.new.tap {|o| o.val = 1}
       y << "foo" << "bar"
diff --git a/test/psych/test_boolean.rb b/test/psych/test_boolean.rb
index b2803a6550..a4b80fc13d 100644
--- a/test/psych/test_boolean.rb
+++ b/test/psych/test_boolean.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
diff --git a/test/psych/test_class.rb b/test/psych/test_class.rb
index 4e1fd4a1d6..71f7ec31fd 100644
--- a/test/psych/test_class.rb
+++ b/test/psych/test_class.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
diff --git a/test/psych/test_coder.rb b/test/psych/test_coder.rb
index e578d55f2d..5ea8cab966 100644
--- a/test/psych/test_coder.rb
+++ b/test/psych/test_coder.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
diff --git a/test/psych/test_date_time.rb b/test/psych/test_date_time.rb
index 3c8b436098..f73f34628f 100644
--- a/test/psych/test_date_time.rb
+++ b/test/psych/test_date_time.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 require 'date'
 
diff --git a/test/psych/test_deprecated.rb b/test/psych/test_deprecated.rb
index eab230231d..624f4379a6 100644
--- a/test/psych/test_deprecated.rb
+++ b/test/psych/test_deprecated.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
diff --git a/test/psych/test_document.rb b/test/psych/test_document.rb
index 97de2e15ec..a88dd32f0d 100644
--- a/test/psych/test_document.rb
+++ b/test/psych/test_document.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
diff --git a/test/psych/test_emitter.rb b/test/psych/test_emitter.rb
index 23e68b324e..52d5e9d1c1 100644
--- a/test/psych/test_emitter.rb
+++ b/test/psych/test_emitter.rb
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# frozen_string_literal: false
+# frozen_string_literal: true
 
 require_relative 'helper'
 
@@ -7,7 +7,7 @@ module Psych
   class TestEmitter < TestCase
     def setup
       super
-      @out = StringIO.new('')
+      @out = StringIO.new(''.dup)
       @emitter = Psych::Emitter.new @out
     end
 
diff --git a/test/psych/test_encoding.rb b/test/psych/test_encoding.rb
index 13ca5dbc74..a4f9f036fd 100644
--- a/test/psych/test_encoding.rb
+++ b/test/psych/test_encoding.rb
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# frozen_string_literal: false
+# frozen_string_literal: true
 
 require_relative 'helper'
 
diff --git a/test/psych/test_exception.rb b/test/psych/test_exception.rb
index fa80fdbeb2..3040bfb7a2 100644
--- a/test/psych/test_exception.rb
+++ b/test/psych/test_exception.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
diff --git a/test/psych/test_hash.rb b/test/psych/test_hash.rb
index b449ce49e3..e93aa73249 100644
--- a/test/psych/test_hash.rb
+++ b/test/psych/test_hash.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
diff --git a/test/psych/test_json_tree.rb b/test/psych/test_json_tree.rb
index 8bb850b138..3c59a8dbda 100644
--- a/test/psych/test_json_tree.rb
+++ b/test/psych/test_json_tree.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
diff --git a/test/psych/test_marshalable.rb b/test/psych/test_marshalable.rb
index 544947a521..b1f4a837f5 100644
--- a/test/psych/test_marshalable.rb
+++ b/test/psych/test_marshalable.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 require 'delegate'
 
diff --git a/test/psych/test_merge_keys.rb b/test/psych/test_merge_keys.rb
index 76245ca7b5..1bc3dd1cb6 100644
--- a/test/psych/test_merge_keys.rb
+++ b/test/psych/test_merge_keys.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
diff --git a/test/psych/test_nil.rb b/test/psych/test_nil.rb
index 3d4fa88eaa..910a2e697d 100644
--- a/test/psych/test_nil.rb
+++ b/test/psych/test_nil.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
diff --git a/test/psych/test_null.rb b/test/psych/test_null.rb
index d8ccb7056f..9d92d74150 100644
--- a/test/psych/test_null.rb
+++ b/test/psych/test_null.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
diff --git a/test/psych/test_numeric.rb b/test/psych/test_numeric.rb
index 9d8b74f7ca..db99a2a0d6 100644
--- a/test/psych/test_numeric.rb
+++ b/test/psych/test_numeric.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 require 'bigdecimal'
 
diff --git a/test/psych/test_object.rb b/test/psych/test_object.rb
index ed1ccd9bf8..f1c61451d0 100644
--- a/test/psych/test_object.rb
+++ b/test/psych/test_object.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
diff --git a/test/psych/test_object_references.rb b/test/psych/test_object_references.rb
index 1300bfc1db..ca69c7d288 100644
--- a/test/psych/test_object_references.rb
+++ b/test/psych/test_object_references.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
diff --git a/test/psych/test_omap.rb b/test/psych/test_omap.rb
index 80791aa918..98636ded97 100644
--- a/test/psych/test_omap.rb
+++ b/test/psych/test_omap.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
diff --git a/test/psych/test_parser.rb b/test/psych/test_parser.rb
index 26aba0543b..6b554cedf0 100644
--- a/test/psych/test_parser.rb
+++ b/test/psych/test_parser.rb
@@ -1,5 +1,5 @@
 # coding: utf-8
-# frozen_string_literal: false
+# frozen_string_literal: true
 
 require_relative 'helper'
 
diff --git a/test/psych/test_psych.rb b/test/psych/test_psych.rb
index 24030d55bc..d0de95627e 100644
--- a/test/psych/test_psych.rb
+++ b/test/psych/test_psych.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 require 'stringio'
@@ -84,7 +84,7 @@ class TestPsych < Psych::TestCase
 
   def test_dump_io
     hash = {'hello' => 'TGIF!'}
-    stringio = StringIO.new ''
+    stringio = StringIO.new ''.dup
     assert_equal stringio, Psych.dump(hash, stringio)
     assert_equal Psych.dump(hash), stringio.string
   end
diff --git a/test/psych/test_safe_load.rb b/test/psych/test_safe_load.rb
index b69c54c199..f3fdb9b9a2 100644
--- a/test/psych/test_safe_load.rb
+++ b/test/psych/test_safe_load.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/helper'
 
 module Psych
diff --git a/test/psych/test_scalar.rb b/test/psych/test_scalar.rb
index 4353ec33fa..e2f9ec791d 100644
--- a/test/psych/test_scalar.rb
+++ b/test/psych/test_scalar.rb
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# frozen_string_literal: false
+# frozen_string_literal: true
 
 require_relative 'helper'
 
@@ -8,5 +8,10 @@ module Psych
     def test_utf_8
       assert_equal "日本語", Psych.load("--- 日本語")
     end
+
+    def test_some_bytes # Ticket #278
+      x = "\xEF\xBF\xBD\x1F"
+      assert_cycle x
+    end
   end
 end
diff --git a/test/psych/test_scalar_scanner.rb b/test/psych/test_scalar_scanner.rb
index e51fc69c4a..ebe8daf672 100644
--- a/test/psych/test_scalar_scanner.rb
+++ b/test/psych/test_scalar_scanner.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 require 'date'
 
diff --git a/test/psych/test_serialize_subclasses.rb b/test/psych/test_serialize_subclasses.rb
index be209edf2f..8e1d0d354d 100644
--- a/test/psych/test_serialize_subclasses.rb
+++ b/test/psych/test_serialize_subclasses.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
diff --git a/test/psych/test_set.rb b/test/psych/test_set.rb
index 0eb999cb2f..5690957eff 100644
--- a/test/psych/test_set.rb
+++ b/test/psych/test_set.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
diff --git a/test/psych/test_stream.rb b/test/psych/test_stream.rb
index 1b054289ea..3bd557cb68 100644
--- a/test/psych/test_stream.rb
+++ b/test/psych/test_stream.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
diff --git a/test/psych/test_string.rb b/test/psych/test_string.rb
index 4aa6016a59..973f38b9c2 100644
--- a/test/psych/test_string.rb
+++ b/test/psych/test_string.rb
@@ -1,5 +1,5 @@
 # encoding: UTF-8
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
@@ -166,7 +166,7 @@ string: &70121654388580 !ruby/string
     end
 
     def test_nonascii_string_as_binary
-      string = "hello \x80 world!"
+      string = "hello \x80 world!".dup
       string.force_encoding 'ascii-8bit'
       yml = Psych.dump string
       assert_match(/binary/, yml)
@@ -174,7 +174,7 @@ string: &70121654388580 !ruby/string
     end
 
     def test_binary_string_null
-      string = "\x00"
+      string = "\x00\x92".b
       yml = Psych.dump string
       assert_match(/binary/, yml)
       assert_equal string, Psych.load(yml)
@@ -187,8 +187,8 @@ string: &70121654388580 !ruby/string
       assert_equal string, Psych.load(yml)
     end
 
-    def test_non_binary_string
-      string = binary_string(0.29)
+    def test_ascii_only_binary_string
+      string = "non bnry string".b
       yml = Psych.dump string
       refute_match(/binary/, yml)
       assert_equal string, Psych.load(yml)
@@ -202,7 +202,7 @@ string: &70121654388580 !ruby/string
     end
 
     def test_string_with_ivars
-      food = "is delicious"
+      food = "is delicious".dup
       ivar = "on rock and roll"
       food.instance_variable_set(:@we_built_this_city, ivar)
 
@@ -220,9 +220,9 @@ string: &70121654388580 !ruby/string
     end
 
     def binary_string percentage = 0.31, length = 100
-      string = ''
+      string = ''.b
       (percentage * length).to_i.times do |i|
-        string << "\b"
+        string << "\x92".b
       end
       string << 'a' * (length - string.length)
       string
diff --git a/test/psych/test_struct.rb b/test/psych/test_struct.rb
index b7968d3189..721df44216 100644
--- a/test/psych/test_struct.rb
+++ b/test/psych/test_struct.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 class PsychStructWithIvar < Struct.new(:foo)
diff --git a/test/psych/test_symbol.rb b/test/psych/test_symbol.rb
index a98881cf4b..36416ffe29 100644
--- a/test/psych/test_symbol.rb
+++ b/test/psych/test_symbol.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
diff --git a/test/psych/test_tainted.rb b/test/psych/test_tainted.rb
index 870583323d..dcf150b138 100644
--- a/test/psych/test_tainted.rb
+++ b/test/psych/test_tainted.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
@@ -90,7 +90,7 @@ module Psych
     end
 
     def assert_taintedness string
-      @parser.parse string.taint
+      @parser.parse string.dup.taint
     end
   end
 
diff --git a/test/psych/test_tree_builder.rb b/test/psych/test_tree_builder.rb
index 09f1ee30c9..3e35788e35 100644
--- a/test/psych/test_tree_builder.rb
+++ b/test/psych/test_tree_builder.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 
 module Psych
diff --git a/test/psych/test_yaml.rb b/test/psych/test_yaml.rb
index cfba770ee1..5fa759c981 100644
--- a/test/psych/test_yaml.rb
+++ b/test/psych/test_yaml.rb
@@ -1,5 +1,5 @@
 # -*- coding: us-ascii; mode: ruby; ruby-indent-level: 4; tab-width: 4 -*-
-# frozen_string_literal: false
+# frozen_string_literal: true
 #												vim:sw=4:ts=4
 # $Id$
 #
diff --git a/test/psych/test_yamldbm.rb b/test/psych/test_yamldbm.rb
index 71ee04f863..1f9ba15cde 100644
--- a/test/psych/test_yamldbm.rb
+++ b/test/psych/test_yamldbm.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 require 'tmpdir'
 
diff --git a/test/psych/test_yamlstore.rb b/test/psych/test_yamlstore.rb
index a9ce652ced..d1e927cefe 100644
--- a/test/psych/test_yamlstore.rb
+++ b/test/psych/test_yamlstore.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require_relative 'helper'
 require 'yaml/store'
 require 'tmpdir'
diff --git a/test/psych/visitors/test_depth_first.rb b/test/psych/visitors/test_depth_first.rb
index 8072c26b57..f8305e15ec 100644
--- a/test/psych/visitors/test_depth_first.rb
+++ b/test/psych/visitors/test_depth_first.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/helper'
 
 module Psych
diff --git a/test/psych/visitors/test_emitter.rb b/test/psych/visitors/test_emitter.rb
index 9317855bbb..70adbb9ca0 100644
--- a/test/psych/visitors/test_emitter.rb
+++ b/test/psych/visitors/test_emitter.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/helper'
 
 module Psych
diff --git a/test/psych/visitors/test_to_ruby.rb b/test/psych/visitors/test_to_ruby.rb
index 8878ea22b2..f342bf0a1a 100644
--- a/test/psych/visitors/test_to_ruby.rb
+++ b/test/psych/visitors/test_to_ruby.rb
@@ -1,5 +1,5 @@
 # coding: US-ASCII
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/helper'
 
 module Psych
diff --git a/test/psych/visitors/test_yaml_tree.rb b/test/psych/visitors/test_yaml_tree.rb
index 8fc18f2fe6..01f1aecd08 100644
--- a/test/psych/visitors/test_yaml_tree.rb
+++ b/test/psych/visitors/test_yaml_tree.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/helper'
 
 module Psych
@@ -37,7 +37,7 @@ module Psych
       end
 
       def test_binary_formatting
-        gif = "GIF89a\f\x00\f\x00\x84\x00\x00\xFF\xFF\xF7\xF5\xF5\xEE\xE9\xE9\xE5fff\x00\x00\x00\xE7\xE7\xE7^^^\xF3\xF3\xED\x8E\x8E\x8E\xE0\xE0\xE0\x9F\x9F\x9F\x93\x93\x93\xA7\xA7\xA7\x9E\x9E\x9Eiiiccc\xA3\xA3\xA3\x84\x84\x84\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9!\xFE\x0EMade with GIMP\x00,\x00\x00\x00\x00\f\x00\f\x00\x00\x05,  \x8E\x810\x9E\xE3@\x14\xE8i\x10\xC4\xD1\x8A\b\x1C\xCF\x80M$z\xEF\xFF0\x85p\xB8\xB01f\r\e\xCE\x01\xC3\x01\x1E\x10' \x82\n\x01\x00;"
+        gif = "GIF89a\f\x00\f\x00\x84\x00\x00\xFF\xFF\xF7\xF5\xF5\xEE\xE9\xE9\xE5fff\x00\x00\x00\xE7\xE7\xE7^^^\xF3\xF3\xED\x8E\x8E\x8E\xE0\xE0\xE0\x9F\x9F\x9F\x93\x93\x93\xA7\xA7\xA7\x9E\x9E\x9Eiiiccc\xA3\xA3\xA3\x84\x84\x84\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9\xFF\xFE\xF9!\xFE\x0EMade with GIMP\x00,\x00\x00\x00\x00\f\x00\f\x00\x00\x05,  \x8E\x810\x9E\xE3@\x14\xE8i\x10\xC4\xD1\x8A\b\x1C\xCF\x80M$z\xEF\xFF0\x85p\xB8\xB01f\r\e\xCE\x01\xC3\x01\x1E\x10' \x82\n\x01\x00;".b
         @v << gif
         scalar = @v.tree.children.first.children.first
         assert_equal Psych::Nodes::Scalar::LITERAL, scalar.style