1 files changed, 16 insertions, 0 deletions
diff --git a/spec/ruby/core/module/attr_writer_spec.rb b/spec/ruby/core/module/attr_writer_spec.rb
index e4b193a9d8..59d8b7bf53 100644
--- a/spec/ruby/core/module/attr_writer_spec.rb
+++ b/spec/ruby/core/module/attr_writer_spec.rb
@@ -61,4 +61,20 @@ describe "Module#attr_writer" do
   it "is a public method" do
     Module.should have_public_instance_method(:attr_writer, false)
   end
+
+  ruby_version_is ""..."3.0" do
+    it "returns nil" do
+      Class.new do
+        (attr_writer :foo, 'bar').should == nil
+      end
+    end
+  end
+
+  ruby_version_is "3.0" do
+    it "returns an array of defined methods names as symbols" do
+      Class.new do
+        (attr_writer :foo, 'bar').should == [:foo=, :bar=]
+      end
+    end
+  end
 end