python3Packages.cssselect2: remove superfluous dependencies

pkgs/development/python-modules/cssselect2/default.nix

@@ -3,11 +3,7 @@
 , pythonOlder
 , fetchPypi
 , tinycss2
-, pytest
-, pytest-runner
-, pytest-cov
-, pytest-flake8
-, pytest-isort
+, pytestCheckHook
 }:
 
 buildPythonPackage rec {
@@ -20,9 +16,15 @@ buildPythonPackage rec {
     sha256 = "93fbb9af860e95dd40bf18c3b2b6ed99189a07c0f29ba76f9c5be71344664ec8";
   };
 
+  postPatch = ''
+    sed -i '/^addopts/d' pyproject.toml
+  '';
+
   propagatedBuildInputs = [ tinycss2 ];
 
-  checkInputs = [ pytest pytest-runner pytest-cov pytest-flake8 pytest-isort ];
+  checkInputs = [ pytestCheckHook ];
+
+  pythonImportsCheck = [ "cssselect2" ];
 
   meta = with lib; {
     description = "CSS selectors for Python ElementTree";