diff --git a/tests/nginx/simple-webapp/default.nix b/tests/nginx/simple-webapp/default.nix
index e217b2b..226d0dd 100644
--- a/tests/nginx/simple-webapp/default.nix
+++ b/tests/nginx/simple-webapp/default.nix
@@ -13,7 +13,9 @@ testService {
 
   tests = {instanceName, instance, ...}:
     ''
+      # fmt: off
       machine.succeed("curl --fail http://localhost:${toString instance.port} | grep 'Hello world from ${instance.from}!'")
+      # fmt: on
     '';
 
   inherit processManagers profiles;