1 files changed, 6 insertions, 0 deletions
diff --git a/test/ruby/test_gc.rb b/test/ruby/test_gc.rb
index 7410516c7a..d43f8b8693 100644
--- a/test/ruby/test_gc.rb
+++ b/test/ruby/test_gc.rb
@@ -79,6 +79,12 @@ class TestGc < Test::Unit::TestCase
     assert_equal(count[:FREE], stat[:heap_free_slot])
   end
 
+  def test_stat_single
+    stat = GC.stat
+    assert_equal stat[:count], GC.stat(:count)
+    assert_raise(ArgumentError){ GC.stat(:invalid) }
+  end
+
   def test_gc_reason
     GC.start
     GC.stat[:heap_free_slot].times{ "a" + "b" }