diff --git a/test/stdlib/Enumerable_test.rb b/test/stdlib/Enumerable_test.rb
index 73dce253b..10cf0c009 100644
--- a/test/stdlib/Enumerable_test.rb
+++ b/test/stdlib/Enumerable_test.rb
@@ -134,7 +134,7 @@ def each
     end
   end
 
-  testing "::Enumerable[String, TestEnumerable]"
+  testing "::Enumerable[String]"
 
   def test_inject
     assert_send_type "(String init, Symbol method) -> untyped", TestEnumerable.new, :inject, '', :<<