diff --git a/pkgs/development/python-modules/portend/default.nix b/pkgs/development/python-modules/portend/default.nix
index 7aa66c2a309..b7d730d6ae0 100644
--- a/pkgs/development/python-modules/portend/default.nix
+++ b/pkgs/development/python-modules/portend/default.nix
@@ -1,13 +1,13 @@
 { stdenv, buildPythonPackage, fetchPypi
-, pytest, setuptools_scm, tempora }:
+, pytest, setuptools_scm, tempora, pytest-black }:
 
 buildPythonPackage rec {
   pname = "portend";
-  version = "2.3";
+  version = "2.5";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "b7ce7d35ea262415297cbfea86226513e77b9ee5f631d3baa11992d663963719";
+    sha256 = "19dc27bfb3c72471bd30a235a4d5fbefef8a7e31cab367744b5d87a205e7bfd9";
   };
 
   postPatch = ''
@@ -18,7 +18,7 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [ tempora ];
 
-  checkInputs = [ pytest ];
+  checkInputs = [ pytest pytest-black ];
 
   checkPhase = ''
     py.test --deselect=test_portend.py::TestChecker::test_check_port_listening