diff --git a/nixos/tests/unbound.nix b/nixos/tests/unbound.nix
index e24c3ef6c99..fcfa222299c 100644
--- a/nixos/tests/unbound.nix
+++ b/nixos/tests/unbound.nix
@@ -192,7 +192,6 @@ import ./make-test-python.nix ({ pkgs, lib, ... }:
 
     testScript = { nodes, ... }: ''
       import typing
-      import json
 
       zone = "example.local."
       records = [("AAAA", "abcd::eeff"), ("A", "1.2.3.4")]