diff --git a/pkgs/development/python-modules/pytest-instafail/default.nix b/pkgs/development/python-modules/pytest-instafail/default.nix
index 69b9a8b17c8e..256c3c582a29 100644
--- a/pkgs/development/python-modules/pytest-instafail/default.nix
+++ b/pkgs/development/python-modules/pytest-instafail/default.nix
@@ -1,6 +1,7 @@
-{ buildPythonPackage
+{ lib
+, buildPythonPackage
 , fetchPypi
-, lib
+, pytest
 , pytestCheckHook
 }:
 
@@ -13,8 +14,17 @@ buildPythonPackage rec {
     sha256 = "sha256-M6YG9+DI5kbcO/7g1eOkt7eO98NhaM+h89k698pwbJ4=";
   };
 
-  nativeCheckInputs = [ pytestCheckHook ];
-  pythonImportsCheck = [ "pytest_instafail" ];
+  buildInputs = [
+    pytest
+  ];
+
+  nativeCheckInputs = [
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [
+    "pytest_instafail"
+  ];
 
   meta = with lib; {
     description = "pytest plugin that shows failures and errors instantly instead of waiting until the end of test session";