1 files changed, 3 insertions, 3 deletions

diff --git a/spec/ruby/core/integer/rationalize_spec.rb b/spec/ruby/core/integer/rationalize_spec.rb
index 09d741af33..272eca6911 100644
--- a/spec/ruby/core/integer/rationalize_spec.rb
+++ b/spec/ruby/core/integer/rationalize_spec.rb
@@ -12,7 +12,7 @@ describe "Integer#rationalize" do
 
   it "returns a Rational object" do
     @numbers.each do |number|
-      number.rationalize.should be_an_instance_of(Rational)
+      number.rationalize.should.instance_of?(Rational)
     end
   end
 
@@ -33,7 +33,7 @@ describe "Integer#rationalize" do
   end
 
   it "raises ArgumentError when passed more than one argument" do
-    -> { 1.rationalize(0.1, 0.1) }.should raise_error(ArgumentError)
-    -> { 1.rationalize(0.1, 0.1, 2) }.should raise_error(ArgumentError)
+    -> { 1.rationalize(0.1, 0.1) }.should.raise(ArgumentError)
+    -> { 1.rationalize(0.1, 0.1, 2) }.should.raise(ArgumentError)
   end
 end