diff --git a/pkgs/development/python-modules/devpi-common/default.nix b/pkgs/development/python-modules/devpi-common/default.nix
index 21bb275918dd..21beec5b440e 100644
--- a/pkgs/development/python-modules/devpi-common/default.nix
+++ b/pkgs/development/python-modules/devpi-common/default.nix
@@ -26,6 +26,7 @@ buildPythonPackage rec {
   ];
 
   checkInputs = [
+    py
     pytestCheckHook
   ];