diff --git a/nixos/tests/morty.nix b/nixos/tests/morty.nix
index 64c5a27665d..ff30b7c072b 100644
--- a/nixos/tests/morty.nix
+++ b/nixos/tests/morty.nix
@@ -24,7 +24,7 @@ import ./make-test-python.nix ({ pkgs, ... }:
     ''
       mortyProxyWithKey.wait_for_unit("default.target")
       mortyProxyWithKey.wait_for_open_port(3001)
-      mortyProxyWithKey.succeed("curl -L 127.0.0.1:3001 | grep MortyProxy")
+      mortyProxyWithKey.succeed("curl -fL 127.0.0.1:3001 | grep MortyProxy")
     '';
 
 })