diff --git a/pkgs/development/python-modules/testscenarios/default.nix b/pkgs/development/python-modules/testscenarios/default.nix
index 61e2ce5a81e9..6fddc17af322 100644
--- a/pkgs/development/python-modules/testscenarios/default.nix
+++ b/pkgs/development/python-modules/testscenarios/default.nix
@@ -6,13 +6,19 @@
 
 buildPythonPackage rec {
   pname = "testscenarios";
-  version = "0.4";
+  version = "0.5.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1671jvrvqlmbnc42j7pc5y6vc37q44aiwrq0zic652pxyy2fxvjg";
+    sha256 = "c257cb6b90ea7e6f8fef3158121d430543412c9a87df30b5dde6ec8b9b57a2b6";
   };
 
+  postPatch = ''
+    substituteInPlace setup.cfg \
+      --replace "buffer = 1" "" \
+      --replace "catch = 1" ""
+  '';
+
   propagatedBuildInputs = [ testtools ];
 
   meta = with stdenv.lib; {