diff --git a/nixos/tests/grafana/provision/default.nix b/nixos/tests/grafana/provision/default.nix
index 7ff7ed74a977..7ec1be6c4d1a 100644
--- a/nixos/tests/grafana/provision/default.nix
+++ b/nixos/tests/grafana/provision/default.nix
@@ -17,7 +17,7 @@ let
 
         security = {
           admin_user = "testadmin";
-          admin_password = "snakeoilpwd";
+          admin_password = "$__file{${pkgs.writeText "pwd" "snakeoilpwd"}}";
         };
       };
     };