1 files changed, 6 insertions, 0 deletions
diff --git a/test/ruby/test_string.rb b/test/ruby/test_string.rb
index 06a92c5957..1387feccf5 100644
--- a/test/ruby/test_string.rb
+++ b/test/ruby/test_string.rb
@@ -2243,6 +2243,12 @@ class TestString < Test::Unit::TestCase
       })
     end
   end
+
+  def test_frozen_strings_are_deduplicated
+    a = "hello"f
+    b = "hello"f
+    assert_equal a.object_id, b.object_id
+  end
 end
 
 class TestString2 < TestString