diff --git a/pkgs/development/python-modules/pyscss/default.nix b/pkgs/development/python-modules/pyscss/default.nix
index e4e7791fa79..bbf4ee712c6 100644
--- a/pkgs/development/python-modules/pyscss/default.nix
+++ b/pkgs/development/python-modules/pyscss/default.nix
@@ -26,6 +26,9 @@ buildPythonPackage rec {
     ++ (lib.optionals (pythonOlder "3.4") [ enum34 pathlib ])
     ++ (lib.optionals (pythonOlder "2.7") [ ordereddict ]);
 
+  # Test suite is broken.
+  # See https://github.com/Kronuz/pyScss/issues/415
+  doCheck = false;
   checkPhase = ''
     py.test
   '';