diff --git a/pkgs/development/python-modules/extras/default.nix b/pkgs/development/python-modules/extras/default.nix
index d73a0c050ea7..a7fd5bbdb958 100644
--- a/pkgs/development/python-modules/extras/default.nix
+++ b/pkgs/development/python-modules/extras/default.nix
@@ -2,24 +2,36 @@
   lib,
   buildPythonPackage,
   fetchPypi,
+  setuptools,
+  pytestCheckHook,
+  testtools,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "extras";
   version = "1.0.0";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchPypi {
-    inherit pname version;
-    sha256 = "132e36de10b9c91d5d4cc620160a476e0468a88f16c9431817a6729611a81b4e";
+    inherit (finalAttrs) pname version;
+    hash = "sha256-Ey423hC5yR1dTMYgFgpHbgRoqI8WyUMYF6ZylhGoG04=";
   };
 
-  # error: invalid command 'test'
-  doCheck = false;
+  build-system = [ setuptools ];
+
+  preCheck = ''
+    substituteInPlace extras/tests/test_extras.py \
+        --replace-fail "assertEquals(" "assertEqual("
+  '';
+
+  nativeCheckInputs = [
+    pytestCheckHook
+    testtools
+  ];
 
   meta = {
     description = "Useful extra bits for Python - things that should be in the standard library";
     homepage = "https://github.com/testing-cabal/extras";
     license = lib.licenses.mit;
   };
-}
+})