diff --git a/nixos/tests/web-servers/unit-php.nix b/nixos/tests/web-servers/unit-php.nix
index 2a0a5bdaa5d5..033036ee7667 100644
--- a/nixos/tests/web-servers/unit-php.nix
+++ b/nixos/tests/web-servers/unit-php.nix
@@ -47,7 +47,7 @@ in {
     machine.wait_for_unit("unit.service")
 
     # Check so we get an evaluated PHP back
-    response = machine.succeed("curl -vvv -s http://127.0.0.1:9074/")
+    response = machine.succeed("curl -f -vvv -s http://127.0.0.1:9074/")
     assert "PHP Version ${pkgs.unit.usedPhp74.version}" in response, "PHP version not detected"
 
     # Check so we have database and some other extensions loaded