diff --git a/pkgs/development/python-modules/actdiag/default.nix b/pkgs/development/python-modules/actdiag/default.nix
index cf84a064b54f..84fe61584547 100644
--- a/pkgs/development/python-modules/actdiag/default.nix
+++ b/pkgs/development/python-modules/actdiag/default.nix
@@ -3,7 +3,6 @@
   blockdiag,
   buildPythonPackage,
   fetchFromGitHub,
-  nose,
   pytestCheckHook,
   pythonOlder,
   setuptools,
@@ -23,17 +22,13 @@ buildPythonPackage rec {
     hash = "sha256-WmprkHOgvlsOIg8H77P7fzEqxGnj6xaL7Df7urRkg3o=";
   };
 
+  patches = [ ./fix_test_generate.patch ];
+
   build-system = [ setuptools ];
 
   propagatedBuildInputs = [ blockdiag ];
 
-  # tests rely on nose
-  doCheck = pythonOlder "3.12";
-
-  nativeCheckInputs = [
-    nose
-    pytestCheckHook
-  ];
+  nativeCheckInputs = [ pytestCheckHook ];
 
   pytestFlagsArray = [ "src/actdiag/tests/" ];
 
diff --git a/pkgs/development/python-modules/actdiag/fix_test_generate.patch b/pkgs/development/python-modules/actdiag/fix_test_generate.patch
new file mode 100644
index 000000000000..95dbf5887268
--- /dev/null
+++ b/pkgs/development/python-modules/actdiag/fix_test_generate.patch
@@ -0,0 +1,22 @@
+diff --git a/src/actdiag/tests/test_generate_diagram.py b/src/actdiag/tests/test_generate_diagram.py
+index c5ee3d5..a74a151 100644
+--- a/src/actdiag/tests/test_generate_diagram.py
++++ b/src/actdiag/tests/test_generate_diagram.py
+@@ -16,16 +16,6 @@
+ import os
+ 
+ from blockdiag.tests.test_generate_diagram import (get_diagram_files,
+-                                                   testcase_generator)
++                                                   test_generate_with_separate)
+ 
+-import actdiag.command
+ 
+-
+-def test_generate():
+-    mainfunc = actdiag.command.main
+-    basepath = os.path.dirname(__file__)
+-    files = get_diagram_files(basepath)
+-    options = []
+-
+-    for testcase in testcase_generator(basepath, mainfunc, files, options):
+-        yield testcase