diff --git a/pkgs/development/python-modules/pypugjs/default.nix b/pkgs/development/python-modules/pypugjs/default.nix
index 3950a03a62f8..218f00110ff0 100644
--- a/pkgs/development/python-modules/pypugjs/default.nix
+++ b/pkgs/development/python-modules/pypugjs/default.nix
@@ -49,7 +49,7 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
-  pytestCheckFlags = [ "pypugjs/testsuite" ];
+  pytestFlags = [ "pypugjs/testsuite" ];
 
   pythonImportsCheck = [
     "pypugjs"