diff --git a/nixos/tests/corerad.nix b/nixos/tests/corerad.nix
index 950c9abc899..741fa448f68 100644
--- a/nixos/tests/corerad.nix
+++ b/nixos/tests/corerad.nix
@@ -17,7 +17,7 @@ import ./make-test-python.nix (
             configFile = pkgs.writeText "corerad.toml" ''
               [[interfaces]]
               name = "eth1"
-              send_advertisements = true
+              advertise = true
                 [[interfaces.prefix]]
                 prefix = "::/64"
             '';