1 files changed, 4 insertions, 6 deletions
diff --git a/nixpkgs/pkgs/development/python-modules/pyfakefs/default.nix b/nixpkgs/pkgs/development/python-modules/pyfakefs/default.nix
index fdd7982a7898..c588607f5c12 100644
--- a/nixpkgs/pkgs/development/python-modules/pyfakefs/default.nix
+++ b/nixpkgs/pkgs/development/python-modules/pyfakefs/default.nix
@@ -9,18 +9,19 @@
 
 # tests
 , pytestCheckHook
+, undefined
 }:
 
 buildPythonPackage rec {
   pname = "pyfakefs";
-  version = "5.3.2";
+  version = "5.3.5";
   pyproject = true;
 
   disabled = pythonOlder "3.5";
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-qDd2o8EEbU0QPy9TACmqbN/18Dht/9WcFe4WkmE1STw=";
+    hash = "sha256-fNxQCzWiFMt6YU4ZQFQ6zGZQ5pqUrHbjDzPJNzvZz5A=";
   };
 
   postPatch = ''
@@ -46,12 +47,9 @@ buildPythonPackage rec {
 
   nativeCheckInputs = [
     pytestCheckHook
+    undefined
   ];
 
-  # https://github.com/jmcgeheeiv/pyfakefs/issues/581 (OSError: [Errno 9] Bad file descriptor)
-  #disabledTests = [ "test_open_existing_pipe" ];
-
-
   meta = with lib; {
     description = "Fake file system that mocks the Python file system modules";
     homepage = "http://pyfakefs.org/";