diff --git a/pkgs/development/python-modules/nevow/default.nix b/pkgs/development/python-modules/nevow/default.nix
index 1adfe13dd13b..fa11ab3fb907 100644
--- a/pkgs/development/python-modules/nevow/default.nix
+++ b/pkgs/development/python-modules/nevow/default.nix
@@ -12,6 +12,8 @@ buildPythonPackage rec {
 
   propagatedBuildInputs = [ twisted ];
 
+  checkInputs = [ twisted ];
+
   checkPhase = ''
     trial formless nevow
   '';