1 files changed, 5 insertions, 5 deletions
diff --git a/spec/ruby/core/kernel/dup_spec.rb b/spec/ruby/core/kernel/dup_spec.rb
index fe0a269d69..99de5e3732 100644
--- a/spec/ruby/core/kernel/dup_spec.rb
+++ b/spec/ruby/core/kernel/dup_spec.rb
@@ -25,14 +25,14 @@ describe "Kernel#dup" do
     end
 
     dup = instance.dup
-    dup.class.should equal klass
+    dup.class.should.equal? klass
   end
 
   it "does not copy frozen state from the original" do
     @obj.freeze
     dup = @obj.dup
 
-    dup.frozen?.should == false
+    dup.should_not.frozen?
   end
 
   it "copies instance variables" do
@@ -44,7 +44,7 @@ describe "Kernel#dup" do
   it "does not copy singleton methods" do
     def @obj.special() :the_one end
     dup = @obj.dup
-    -> { dup.special }.should raise_error(NameError)
+    -> { dup.special }.should.raise(NameError)
   end
 
   it "does not copy modules included in the singleton class" do
@@ -53,7 +53,7 @@ describe "Kernel#dup" do
     end
 
     dup = @obj.dup
-    -> { dup.repr }.should raise_error(NameError)
+    -> { dup.repr }.should.raise(NameError)
   end
 
   it "does not copy constants defined in the singleton class" do
@@ -62,6 +62,6 @@ describe "Kernel#dup" do
     end
 
     dup = @obj.dup
-    -> { class << dup; CLONE; end }.should raise_error(NameError)
+    -> { class << dup; CLONE; end }.should.raise(NameError)
   end
 end