diff --git a/pkgs/development/libraries/haskell/wl-pprint-extras/default.nix b/pkgs/development/libraries/haskell/wl-pprint-extras/default.nix
index 77670b4f117e..dd32750ffe91 100644
--- a/pkgs/development/libraries/haskell/wl-pprint-extras/default.nix
+++ b/pkgs/development/libraries/haskell/wl-pprint-extras/default.nix
@@ -1,10 +1,13 @@
-{ cabal, nats, semigroupoids, semigroups, text, utf8String }:
+{ cabal, HUnit, nats, semigroupoids, semigroups, testFramework
+, testFrameworkHunit, text, utf8String
+}:
 
 cabal.mkDerivation (self: {
   pname = "wl-pprint-extras";
-  version = "3.4";
-  sha256 = "17vxyckx2pj4sc2d1yw1rcsxn1rp4nzdjp0hgpy78xsp9plccgsy";
+  version = "3.5";
+  sha256 = "172xp23j3w8jbd7h0sna9g8p4d6xwy8154gqj93ycz2907r2kwb7";
   buildDepends = [ nats semigroupoids semigroups text utf8String ];
+  testDepends = [ HUnit testFramework testFrameworkHunit ];
   meta = {
     homepage = "http://github.com/ekmett/wl-pprint-extras/";
     description = "A free monad based on the Wadler/Leijen pretty printer";