diff --git a/pkgs/development/python-modules/mkdocs-rss-plugin/default.nix b/pkgs/development/python-modules/mkdocs-rss-plugin/default.nix
index a76954b7744b..d21f09234b2e 100644
--- a/pkgs/development/python-modules/mkdocs-rss-plugin/default.nix
+++ b/pkgs/development/python-modules/mkdocs-rss-plugin/default.nix
@@ -7,6 +7,7 @@
   gitpython,
   jsonfeed,
   mkdocs,
+  pytest-cov-stub,
   pytestCheckHook,
   pythonOlder,
   setuptools,
@@ -27,10 +28,6 @@ buildPythonPackage rec {
     hash = "sha256-Qa8EgjucJaxvKivE45kXSUgTx5RnLEpYCNZJRTO2E1Q=";
   };
 
-  postPatch = ''
-    sed -i "/--cov/d" setup.cfg
-  '';
-
   build-system = [ setuptools ];
 
   dependencies = [
@@ -42,6 +39,7 @@ buildPythonPackage rec {
   nativeCheckInputs = [
     feedparser
     jsonfeed
+    pytest-cov-stub
     pytestCheckHook
     validator-collection
   ];