diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index e94da936af31..9513b3e8f10a 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -17797,17 +17797,25 @@ in {
 
   pyscss = buildPythonPackage rec {
     name = "pyScss-${version}";
-    version = "1.3.4";
+    version = "1.3.5";
 
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/p/pyScss/${name}.tar.gz";
-      sha256 = "03lcp853kgr66aqrw2jd1q9jhs9h049w7zlwp7bfmly7xh832cnh";
+    src = pkgs.fetchFromGitHub {
+      sha256 = "0lfsan74vcw6dypb196gmbprvlbran8p7w6czy8hyl2b1l728mhz";
+      rev = "v1.3.5";
+      repo = "pyScss";
+      owner = "Kronuz";
     };
 
+    checkInputs = with self; [ pytest ];
+
     propagatedBuildInputs = with self; [ six ]
       ++ (optionals (pythonOlder "3.4") [ enum34 pathlib ])
       ++ (optionals (pythonOlder "2.7") [ ordereddict ]);
 
+    checkPhase = ''
+      py.test
+    '';
+
     meta = {
       description = "A Scss compiler for Python";
       homepage = http://pyscss.readthedocs.org/en/latest/;