diff --git a/pkgs/development/python-modules/async-upnp-client/default.nix b/pkgs/development/python-modules/async-upnp-client/default.nix
index 6697cb5d13e8..5f6d68b9ca53 100644
--- a/pkgs/development/python-modules/async-upnp-client/default.nix
+++ b/pkgs/development/python-modules/async-upnp-client/default.nix
@@ -1,6 +1,6 @@
 { lib, buildPythonPackage, fetchFromGitHub, pythonOlder
 , voluptuous, aiohttp, async-timeout, python-didl-lite, defusedxml
-, pytest_6, pytest-asyncio }:
+, pytestCheckHook, pytest-asyncio }:
 
 buildPythonPackage rec {
   pname = "async-upnp-client";
@@ -23,7 +23,7 @@ buildPythonPackage rec {
   ];
 
   checkInputs = [
-    pytest_6
+    pytestCheckHook
     pytest-asyncio
   ];
 
diff --git a/pkgs/development/python-modules/werkzeug/default.nix b/pkgs/development/python-modules/werkzeug/default.nix
index 7f35dd124d86..73bebd8366ec 100644
--- a/pkgs/development/python-modules/werkzeug/default.nix
+++ b/pkgs/development/python-modules/werkzeug/default.nix
@@ -25,5 +25,6 @@ buildPythonPackage rec {
     homepage = "https://palletsprojects.com/p/werkzeug/";
     description = "A WSGI utility library for Python";
     license = licenses.bsd3;
+    maintainers = [ ];
   };
 }
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 326f26331fc6..2c38be653050 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -526,7 +526,9 @@ in {
 
   async-timeout = callPackage ../development/python-modules/async_timeout { };
 
-  async-upnp-client = callPackage ../development/python-modules/async-upnp-client { };
+  async-upnp-client = callPackage ../development/python-modules/async-upnp-client {
+    pytestCheckHook = self.pytestCheckHook.override { pytest = self.pytest_6_1; };
+  };
 
   asyncwhois = callPackage ../development/python-modules/asyncwhois { };
 
@@ -8524,7 +8526,13 @@ in {
 
   webthing = callPackage ../development/python-modules/webthing { };
 
-  werkzeug = callPackage ../development/python-modules/werkzeug { };
+  werkzeug = callPackage ../development/python-modules/werkzeug {
+    pytestCheckHook = self.pytestCheckHook.override { pytest = self.pytest_6_1; };
+    pytest-timeout = self.pytest-timeout.override {
+      pytest = self.pytest_6_1;
+      pytestCheckHook = self.pytestCheckHook.override { pytest = self.pytest_6_1; };
+    };
+  };
 
   west = callPackage ../development/python-modules/west { };