diff --git a/spec/ruby/optional/capi/constants_spec.rb b/spec/ruby/optional/capi/constants_spec.rb
index d663ecda30..096332971c 100644
--- a/spec/ruby/optional/capi/constants_spec.rb
+++ b/spec/ruby/optional/capi/constants_spec.rb
@@ -25,8 +25,10 @@ describe "C-API constant" do
     @s.rb_mComparable.should == Comparable
   end
 
-  specify "rb_cData references the Data class" do
-    @s.rb_cData.should == Data
+  ruby_version_is ""..."2.5" do
+    specify "rb_cData references the Data class" do
+      @s.rb_cData.should == Data
+    end
   end
 
   specify "rb_mEnumerable references the Enumerable module" do