diff --git a/pkgs/development/libraries/expat/default.nix b/pkgs/development/libraries/expat/default.nix
index 83038918e3a2..a05f3b71fb46 100644
--- a/pkgs/development/libraries/expat/default.nix
+++ b/pkgs/development/libraries/expat/default.nix
@@ -45,6 +45,7 @@ stdenv.mkDerivation rec {
 
   passthru.tests = {
     inherit python3;
+    inherit (python3.pkgs) xmltodict;
     inherit (haskellPackages) hexpat;
     inherit (perlPackages) XMLSAXExpat XMLParser;
     inherit (luaPackages) luaexpat;