Index: b/rio-orphans.cabal
===================================================================
--- a/rio-orphans.cabal
+++ b/rio-orphans.cabal
@@ -51,7 +51,7 @@ test-suite rio-orphans-test
       Paths_rio_orphans
   hs-source-dirs:
       test
-  ghc-options: -threaded -rtsopts -with-rtsopts=-N
+  ghc-options: -threaded -rtsopts
   build-depends:
       base >=4.9 && <10
     , exceptions
