diff --git a/pkgs/development/python-modules/Mako/default.nix b/pkgs/development/python-modules/Mako/default.nix
index 1144ca2a27f..85493f2760a 100644
--- a/pkgs/development/python-modules/Mako/default.nix
+++ b/pkgs/development/python-modules/Mako/default.nix
@@ -4,20 +4,20 @@
 , markupsafe
 , nose
 , mock
-, pytest_3
+, pytest
 , isPyPy
 }:
 
 buildPythonPackage rec {
   pname = "Mako";
-  version = "1.0.10";
+  version = "1.0.12";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "7165919e78e1feb68b4dbe829871ea9941398178fa58e6beedb9ba14acf63965";
+    sha256 = "0cfa65de3a835e87eeca6ac856b3013aade55f49e32515f65d999f91a2324162";
   };
 
-  checkInputs = [ markupsafe nose mock pytest_3 ];
+  checkInputs = [ markupsafe nose mock pytest ];
   propagatedBuildInputs = [ markupsafe ];
 
   doCheck = !isPyPy;  # https://bitbucket.org/zzzeek/mako/issue/238/2-tests-failed-on-pypy-24-25