1 files changed, 2 insertions, 2 deletions
diff --git a/spec/ruby/core/random/urandom_spec.rb b/spec/ruby/core/random/urandom_spec.rb
index 6f180e54ac..94e9423a06 100644
--- a/spec/ruby/core/random/urandom_spec.rb
+++ b/spec/ruby/core/random/urandom_spec.rb
@@ -2,7 +2,7 @@ require_relative '../../spec_helper'
 
 describe "Random.urandom" do
   it "returns a String" do
-    Random.urandom(1).should be_an_instance_of(String)
+    Random.urandom(1).should.instance_of?(String)
   end
 
   it "returns a String of the length given as argument" do
@@ -12,7 +12,7 @@ describe "Random.urandom" do
   it "raises an ArgumentError on a negative size" do
     -> {
       Random.urandom(-1)
-    }.should raise_error(ArgumentError)
+    }.should.raise(ArgumentError)
   end
 
   it "returns a binary String" do