diff --git a/nixos/tests/limesurvey.nix b/nixos/tests/limesurvey.nix
index 7228fcb83315..dad807fb7330 100644
--- a/nixos/tests/limesurvey.nix
+++ b/nixos/tests/limesurvey.nix
@@ -20,7 +20,7 @@ import ./make-test-python.nix ({ pkgs, ... }: {
 
     machine.wait_for_unit("phpfpm-limesurvey.service")
     assert "The following surveys are available" in machine.succeed(
-        "curl http://example.local/"
+        "curl -f http://example.local/"
     )
   '';
 })