1 files changed, 4 insertions, 4 deletions
diff --git a/spec/ruby/core/string/bytes_spec.rb b/spec/ruby/core/string/bytes_spec.rb
index 859b346550..e6019fb987 100644
--- a/spec/ruby/core/string/bytes_spec.rb
+++ b/spec/ruby/core/string/bytes_spec.rb
@@ -9,7 +9,7 @@ describe "String#bytes" do
   end
 
   it "returns an Array when no block is given" do
-    @utf8.bytes.should be_an_instance_of(Array)
+    @utf8.bytes.should.instance_of?(Array)
   end
 
   it "yields each byte to a block if one is given, returning self" do
@@ -23,8 +23,8 @@ describe "String#bytes" do
   end
 
   it "returns bytes as Integers" do
-    @ascii.bytes.to_a.each {|b| b.should be_an_instance_of(Integer)}
-    @utf8_ascii.bytes { |b| b.should be_an_instance_of(Integer) }
+    @ascii.bytes.to_a.each {|b| b.should.instance_of?(Integer)}
+    @utf8_ascii.bytes { |b| b.should.instance_of?(Integer) }
   end
 
   it "agrees with #unpack('C*')" do
@@ -50,6 +50,6 @@ describe "String#bytes" do
   end
 
   it "is unaffected by #force_encoding" do
-    @utf8.force_encoding('ASCII').bytes.to_a.should == @utf8.bytes.to_a
+    @utf8.dup.force_encoding('ASCII').bytes.to_a.should == @utf8.bytes.to_a
   end
 end