diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 620709e67969..0c088dc7fc5d 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -18081,7 +18081,7 @@ in {
     # to force it a little.
     installFlags = [ "--ignore-installed" ];
 
-    buildInputs = with self; [ mock scripttest virtualenv pretend pytest ];
+    checkInputs = with self; [ mock scripttest virtualenv pretend pytest ];
     # Pip wants pytest, but tests are not distributed
     doCheck = false;