diff --git a/pkgs/development/python-modules/idna/default.nix b/pkgs/development/python-modules/idna/default.nix
index 14b366b8eb5..9bb639f95d5 100644
--- a/pkgs/development/python-modules/idna/default.nix
+++ b/pkgs/development/python-modules/idna/default.nix
@@ -1,6 +1,7 @@
 { lib
 , buildPythonPackage
 , fetchPypi
+, pytestCheckHook
 }:
 
 buildPythonPackage rec {
@@ -12,6 +13,8 @@ buildPythonPackage rec {
     sha256 = "c5b02147e01ea9920e6b0a3f1f7bb833612d507592c837a6c49552768f4054e1";
   };
 
+  checkInputs = [ pytestCheckHook ];
+
   meta = {
     homepage = "https://github.com/kjd/idna/";
     description = "Internationalized Domain Names in Applications (IDNA)";