diff --git a/spec/ruby/library/socket/constants/constants_spec.rb b/spec/ruby/library/socket/constants/constants_spec.rb
index da66f681c7..710af12828 100644
--- a/spec/ruby/library/socket/constants/constants_spec.rb
+++ b/spec/ruby/library/socket/constants/constants_spec.rb
@@ -89,12 +89,7 @@ describe "Socket::Constants" do
 
   platform_is_not :windows do
     it 'defines SCM options' do
-      platform_is :darwin, :freebsd, :solaris do
-        Socket::Constants.should have_constant('SCM_CREDS')
-      end
-      platform_is_not :darwin, :freebsd, :solaris do
-        Socket::Constants.should have_constant('SCM_CREDENTIALS')
-      end
+      Socket::Constants.should have_constant('SCM_RIGHTS')
     end
 
     it 'defines error options' do