diff --git a/pkgs/development/python-modules/formulaic/default.nix b/pkgs/development/python-modules/formulaic/default.nix
index 457d2eab2c0b..3cfe44c55d53 100644
--- a/pkgs/development/python-modules/formulaic/default.nix
+++ b/pkgs/development/python-modules/formulaic/default.nix
@@ -48,7 +48,7 @@ buildPythonPackage rec {
 
   pythonImportsCheck = [ "formulaic" ];
 
-  checkInputs = [ pytestCheckHook ];
+  nativeCheckInputs = [ pytestCheckHook ];
 
   disabledTestPaths = [
     "tests/transforms/test_poly.py"