diff --git a/pkgs/development/python-modules/testresources/default.nix b/pkgs/development/python-modules/testresources/default.nix
index 4a9d43d6246d..724a6c364358 100644
--- a/pkgs/development/python-modules/testresources/default.nix
+++ b/pkgs/development/python-modules/testresources/default.nix
@@ -1,24 +1,42 @@
-{ lib, buildPythonPackage, fetchPypi, python
-, pbr, fixtures, testtools }:
+{ lib
+, buildPythonPackage
+, fetchPypi
+, setuptools
+, pbr
+, fixtures
+, testtools
+, unittestCheckHook
+}:
 
 buildPythonPackage rec {
   pname = "testresources";
   version = "2.0.1";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
     sha256 = "ee9d1982154a1e212d4e4bac6b610800bfb558e4fb853572a827bc14a96e4417";
   };
 
-  propagatedBuildInputs = [ pbr ];
-
-  nativeCheckInputs = [ fixtures testtools ];
-
-  checkPhase = ''
-    ${python.interpreter} -m testtools.run discover
+  postPatch = ''
+    substituteInPlace testresources/tests/test_resourced_test_case.py \
+      --replace "failIf" "assertFalse"
   '';
 
+  nativeBuildInputs = [
+    setuptools
+  ];
+
+  propagatedBuildInputs = [
+    pbr
+  ];
+
+  nativeCheckInputs = [
+    fixtures
+    testtools
+    unittestCheckHook
+  ];
+
   meta = with lib; {
     description = "Pyunit extension for managing expensive test resources";
     homepage = "https://launchpad.net/testresources";