diff --git a/pkgs/development/python-modules/qtconsole/default.nix b/pkgs/development/python-modules/qtconsole/default.nix
index 07b5a316961..810cffa5cc6 100644
--- a/pkgs/development/python-modules/qtconsole/default.nix
+++ b/pkgs/development/python-modules/qtconsole/default.nix
@@ -21,7 +21,7 @@ buildPythonPackage rec {
     sha256 = "1b03n1ixzscm0jw97l4dq5iy4fslnqxq5bb8287xb7n2a1gs26xw";
   };
 
-  buildInputs = [ nose ] ++ lib.optionals isPy27 [mock];
+  checkInputs = [ nose ] ++ lib.optionals isPy27 [mock];
   propagatedBuildInputs = [traitlets jupyter_core jupyter_client pygments ipykernel pyqt5];
 
   # : cannot connect to X server