Skip 2 specs on Ruby 2.3 that fail in CI due to base64 gem with wrong…

… required_ruby_version

spec/rails_integration_spec.rb

@@ -257,7 +257,7 @@ def o.puts(*) end
     sin_get('/nest_inputs').must_equal '0 <form action="/baz"> 1 <p>FBB</p> 2 n1 <fieldset class="inputs"> n2 <input id="first" name="first" type="text" value="foo"/> <input id="last" name="last" type="text" value="bar"/> n3 </fieldset> n4 <fieldset class="inputs"><legend>Foo</legend><input id="first" name="first" type="text" value="foo"/><input id="last" name="last" type="text" value="bar"/></fieldset> n5 3 </form>4'
   end
 
-  unless defined?(JRUBY_VERSION) && JRUBY_VERSION =~ /\A9\.0/ && defined?(ActionPack::VERSION::STRING) && ActionPack::VERSION::STRING >= '5.1'
+  unless (defined?(JRUBY_VERSION) && JRUBY_VERSION =~ /\A9\.0/ && defined?(ActionPack::VERSION::STRING) && ActionPack::VERSION::STRING >= '5.1') || RUBY_VERSION =~ /\A2\.3/
     it "#form should correctly handle situation Sequel integration with subforms where multiple templates are used with same form object" do
       sin_get('/nest_seq').sub(%r{<input name="authenticity_token" type="hidden" value="([^"]+)"/>}, '<input name="authenticity_token" type="hidden" value="csrf"/>').must_equal '0 <form action="/baz" class="forme album" method="post"><input name="authenticity_token" type="hidden" value="csrf"/> 1 <input id="album_artist_attributes_id" name="album[artist_attributes][id]" type="hidden" value="2"/><fieldset class="inputs"><legend>Foo</legend><label>Name: <input id="album_artist_attributes_name" maxlength="255" name="album[artist_attributes][name]" type="text" value="A"/></label></fieldset> 2 n1 <input id="album_artist_attributes_id" name="album[artist_attributes][id]" type="hidden" value="2"/><fieldset class="inputs"><legend>Artist</legend> n2 <label>Name2: <input id="album_artist_attributes_name2" name="album[artist_attributes][name2]" type="text" value="A2"/></label> n3 </fieldset> n4 <input id="album_artist_attributes_id" name="album[artist_attributes][id]" type="hidden" value="2"/><fieldset class="inputs"><legend>Bar</legend><label>Name3: <input id="album_artist_attributes_name3" name="album[artist_attributes][name3]" type="text" value="A3"/></label></fieldset> n5 3 </form>4'
     end