1 files changed, 12 insertions, 0 deletions
diff --git a/spec/ruby/core/warning/element_set_spec.rb b/spec/ruby/core/warning/element_set_spec.rb
index f439ffde0a..d59a7d4c9e 100644
--- a/spec/ruby/core/warning/element_set_spec.rb
+++ b/spec/ruby/core/warning/element_set_spec.rb
@@ -17,6 +17,18 @@ describe "Warning.[]=" do
     end
   end
 
+  ruby_version_is '3.3' do
+    it "enables or disables performance warnings" do
+      original = Warning[:performance]
+      begin
+        Warning[:performance] = !original
+        Warning[:performance].should == !original
+      ensure
+        Warning[:performance] = original
+      end
+    end
+  end
+
   it "raises for unknown category" do
     -> { Warning[:noop] = false }.should raise_error(ArgumentError, /unknown category: noop/)
   end