1 files changed, 5 insertions, 1 deletions
diff --git a/spec/ruby/core/regexp/encoding_spec.rb b/spec/ruby/core/regexp/encoding_spec.rb
index 6ce6f8b3ca..fb4fdba064 100644
--- a/spec/ruby/core/regexp/encoding_spec.rb
+++ b/spec/ruby/core/regexp/encoding_spec.rb
@@ -3,7 +3,7 @@ require_relative '../../spec_helper'
 
 describe "Regexp#encoding" do
   it "returns an Encoding object" do
-    /glar/.encoding.should be_an_instance_of(Encoding)
+    /glar/.encoding.should.instance_of?(Encoding)
   end
 
   it "defaults to US-ASCII if the Regexp contains only US-ASCII character" do
@@ -55,4 +55,8 @@ describe "Regexp#encoding" do
     /foo/.encoding.should_not == Encoding::EUC_JP
     Encoding.default_internal = old_internal
   end
+
+  it "allows otherwise invalid characters if NOENCODING is specified" do
+    Regexp.new('([\x00-\xFF])', Regexp::IGNORECASE | Regexp::NOENCODING).encoding.should == Encoding::BINARY
+  end
 end