diff --git a/test/stdlib/Encoding_test.rb b/test/stdlib/Encoding_test.rb
index 3172fa5eb..3015f95b5 100644
--- a/test/stdlib/Encoding_test.rb
+++ b/test/stdlib/Encoding_test.rb
@@ -73,8 +73,4 @@ def test_name
   def test_names
     Encoding::UTF_8.names
   end
-
-  def test_replicate
-    Encoding::UTF_8.replicate("a")
-  end
 end