diff --git a/nixos/tests/mesos.nix b/nixos/tests/mesos.nix
index 3ceb1d8125b..2e6dc0eda06 100644
--- a/nixos/tests/mesos.nix
+++ b/nixos/tests/mesos.nix
@@ -33,6 +33,7 @@ import ./make-test.nix ({ pkgs, ...} : rec {
 
   simpleDocker = pkgs.dockerTools.buildImage {
     name = "echo";
+    tag = "latest";
     contents = [ pkgs.stdenv.shellPackage pkgs.coreutils ];
     config = {
       Env = [