diff --git a/test/ruby/test_marshal.rb b/test/ruby/test_marshal.rb
index 19f41de27e..361d18dd4b 100644
--- a/test/ruby/test_marshal.rb
+++ b/test/ruby/test_marshal.rb
@@ -922,7 +922,7 @@ class TestMarshal < Test::Unit::TestCase
     end
 
     def test_modules_and_classes_are_not_frozen
-      objects = Marshal.load(encode([Object, Kernel]), freeze: true)
+      _objects = Marshal.load(encode([Object, Kernel]), freeze: true)
       refute_predicate Object, :frozen?
       refute_predicate Kernel, :frozen?
     end