diff --git a/pkgs/development/libraries/haskell/testpack/default.nix b/pkgs/development/libraries/haskell/testpack/default.nix
index 35b619166a4f..bb729ef31201 100644
--- a/pkgs/development/libraries/haskell/testpack/default.nix
+++ b/pkgs/development/libraries/haskell/testpack/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "testpack";
-  version = "2.1.1";
-  sha256 = "1z8g3xhvy901h7kr7q4wcms5b23xniskrgxfpq42w4b34acwvhmg";
+  version = "2.1.2";
+  sha256 = "12dhl8svy0wmdwlvkp0p0j6wr6vgv4hrjcpdv48kc5rcwjvh8xif";
   buildDepends = [ HUnit mtl QuickCheck random ];
   meta = {
     homepage = "http://hackage.haskell.org/cgi-bin/hackage-scripts/package/testpack";