diff --git a/nixos/tests/ferm.nix b/nixos/tests/ferm.nix
index a73c9ce739cf..112b5f19a7de 100644
--- a/nixos/tests/ferm.nix
+++ b/nixos/tests/ferm.nix
@@ -56,6 +56,7 @@ import ./make-test-python.nix ({ pkgs, ...} : {
       start_all()
 
       client.wait_for_unit("network-online.target")
+      server.wait_for_unit("network-online.target")
       server.wait_for_unit("ferm.service")
       server.wait_for_unit("nginx.service")
       server.wait_until_succeeds("ss -ntl | grep -q 80")