diff --git a/pkgs/by-name/mu/mujoco/package.nix b/pkgs/by-name/mu/mujoco/package.nix
index c0bea6fdd240..50bf731bdeae 100644
--- a/pkgs/by-name/mu/mujoco/package.nix
+++ b/pkgs/by-name/mu/mujoco/package.nix
@@ -184,6 +184,7 @@ stdenv.mkDerivation (finalAttrs: {
     };
     tests = {
       pythonMujoco = python3Packages.mujoco;
+      pythonMujocoMjx = python3Packages.mujoco-mjx;
     };
   };