diff --git a/pkgs/development/python-modules/grip/default.nix b/pkgs/development/python-modules/grip/default.nix
index d163b0bd5dc..c11bcaa5baa 100644
--- a/pkgs/development/python-modules/grip/default.nix
+++ b/pkgs/development/python-modules/grip/default.nix
@@ -33,7 +33,7 @@ buildPythonPackage rec {
     })
   ];
 
-  buildInputs = [ pytest responses ];
+  checkInputs = [ pytest responses ];
 
   propagatedBuildInputs = [ docopt flask markdown path-and-address pygments requests tabulate ];